Danfoss Series 51 and 51-1 Bent Axis Variable Displ. Motors User guide

Technical Information

Bent Axis Variable Displ. Motors

Series 51 and 51-1

powersolutions.danfoss.com

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Revision history Table of revisions

Date Changed Rev

October 2017 Modified theor. corner power ratings and updated to Engineering Tomorrow 0401

March 2015 Major update. Corrected DITA CMS structure, layout, colors and all tables. CA

Jan 2014 Converted to Danfoss layout - DITA CMS BA

Jun 2005 First version AA

2 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Series 51 general information

Series 51 and 51-1 variable displacement motors are bent axis design units, incorporating spherical pistons.

These motors are designed primarily to be combined with other products in closed circuit systems to transfer and control hydraulic power. Series 51 and 51-1 motors have a large maximum / minimum displacement ratio (5:1) and high output speed capabilities. SAE, cartridge, and DIN flange configurations are available.

A complete family of controls and regulators is available to fulfill the requirements of a wide range of applications.

Motors normally start at maximum displacement. This provides maximum starting torque for high acceleration.

The controls may utilize internally supplied servo pressure. They may be overridden by a pressure compensator which functions when the motor is operating in motor and pump modes. A defeat option is available to disable the pressure compensator override when the motor is running in pump mode.

The pressure compensator option features a low pressure rise (short ramp) to ensure optimal power utilization throughout the entire displacement range of the motor. The pressure compensator is also available as a stand-alone regulator.

The series 51 and 51-1 motors – Advanced technology

•

The most technically advanced hydraulic units in the industry

•

SAE, cartridge, and DIN flange motors

•

Cartridge motors designed for direct installation in compact planetary drives

•

Large displacement ratio (5:1)

•

Complete family of control systems

•

Proven reliability and performance

•

Optimum product configurations

•

Compact, lightweight

•

6 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

3

7

1

5

121094 8

P001196

11

2

6

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Series 51 general information

Sectional view of Series 51, proportional control

Series 51 with electric proportional control

Legend:

1 – Piston 2 – Flange 3 – Servo piston 4 – Electric proportional control 5 – Synchronizing shaft 6 – Speed sensor 7 – Charge pressure relief valve 8 – Minimum displacement limiter 9 – Valve segment 10 – Bearing plate 11 – Speed pickup ring 12 – Tapered roller bearings

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 7

P001831

3

7

1

5

12109

4

8

11

2

6

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Series 51 general information

Sectional view of Series 51-1, two-position control

Series 51 with electrohydraulic two-position control

Legend:

1 – Piston 2 – Flange 3 – Servo piston 4 – Electrohydraulic two-position control 5 – Synchronizing shaft 6 – Speed sensor 7 – Charge pressure relief valve 8 – Minimum displacement limiter 9 – Valve segment 10 – Bearing plate 11 – Speed pickup ring 12 – Tapered roller bearings

8 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Multi-function valve

Synchronizing shaft

Pump swashplate

Servo control cylinder

Reversible variable displacement pump

Input shaft

Heat exchanger

Loop flushing valve

Charge pump

Orificed check valve

Multi-function valve

Charge pressure relief valve

Servo pressure relief valves

to pump case

P001 175E

Control handle

Displacement control valve

Heat exchanger Bypass valve

Reservoir

Vacuum gauge

Hydraulic two-position control

Bent axis variable displacement motor

Output shaft

Case drain fluid

Working loop (High pressure)

Working loop (Low pressure)

Loop flushing relief valve

Servo pressure

Suction

to motor case

max. disp.

T1

T7 T8

T2

T3

M

M7

Signal pressure supply

X1

L1

BB

L2

M2

M1

M4

M5

M3

L2

M4

M3

N

M1

M5

M2

A A

S

n

P001833E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Series 51 general information

Pictorial diagram

System circuit diagram

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 9

Above schematic shows the function of a hydrostatic transmission using a Series 90 Axial Piston Variable Displacement Pump with manual displacement control (MA) and a Series 51 Bent Axis Variable Displacement Motor with hydraulic two-position control (HZ).

Made in Germany

Serial No.

Model Code

Model No./Ident. No.

Neumünster/Germany

Place of manufacture

Ident number

Serial number

Model code

Barcode serial number

P001 832E

5084092

51V080 RS1N L1B1 WB31 ADA 051AAF0 D400

N982211215

508 4092

Made in Germany

Serial No.

Model Code

Model No./Ident. No.

Neumünster/Germany

Place of manufacture

Ident number

Serial number

Model code

Barcode serial number

P001 832E

511685

51D110-1-RD4N E1B1 NNU2 ADD 030AAA3 0000

N973212355

511 685

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Series 51 general information

Series 51/51-1 name plates

Series 51 name plate

Series 51-1 name plate

10 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Technical specifications

General specifications

Most specifications for bent axis variable displacement motors are listed on these pages. For definitions of the various specifications, see the related pages in this publication. Not all hardware options are available for all configurations; consult the series 51 and 51-1 model code supplement or price book for more information.

General specifications

Design

Direction of rotation

Recommended installation

Other system requirements

Specific data

Physical properties

Features Unit

Maximum

Displacement

Minimum

Theor. flow at max. displ.

Theor. corner power at rated speed and max. working pressure (Δp = 450 bar [6527 psi])

Theoretical torque

Mass moment of inertia of rotating components

Rated speed

Maximum

*

speed

*

Contact Danfoss representative for max. speed at displacements between max. and min. displacement.

at rated speed at max. speed

at max. displ.

at min. displ.

at max. displ.

at min. displ.

at max. displ.

at min. displ.

Axial piston motor with variable displacement, bent axis design

Clockwise and counter-clockwise (bi-directional)

Discretionary, the housing must always be filled with hydraulic fluid

Independet braking system, circuit overpressure protection, suitable reservoir

Size

060 080 110 160 250

cm3 [in3]

l/min [US gal/min]

kW [hp]

N•m/bar [lbf•in/1000 psi]

2

kg•m [slug•ft2]

min-1(rpm)

60.0 [3.66] 80.7 [4.92] 109.9 [6.71]

12 [0.73] 16.1 [0.98] 22 [1.34] 32.2 [1.96] 50.0 [3.05]

216 [57] 250 [66] 308 [81] 402 [106] 550 [145]

264 [71] 323 [85] 396 [105] 515 [136] 675 [178]

252 [338]

0.95

[583]

0.19

[117]

0.0046

[0.1092]

3600 3100 2800 2500 2200

5600 5000 4500 4000 3400

4400 4000 3600 3200 2700

7000 6250 5600 5000 4250

300 [402]

1.28 [784]

0.26 [156]

0.0071 [0.1685]

371 [498]

1.75 [1067]

0.35 [214]

0.0128 [0.3037]

160.9 [9.82]

480 [644]

2.56 [1563]

0.51 [313]

0.0234 [0.5553]

250 [15.26]

638 [856]

3.98 [2428]

0.80 [486]

0.0480 [1.1580]

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 11

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Technical specifications

System and case pressure

Parameter

Maximum delta

Fluid specifications

System pressure

Case pressure

Fluid specifications

Features Unit

Viscosity

Temperature range

Cleanliness and Filtration

1)

At the hottest point, normally case drain port.

2)

Minimum: cold start, short term t<3 min, p<50 bar, n<1000 rpm.

Maximum

Minimum low

Rated

Maximum (cold start)

Minimum (at rated speed)

Minimum intermittent

Recommended range

Maximum intermittent

Minimum

1)2)

Rated

Maximum intermittent

Required cleanliness per ISO 4406

Efficiency (charge pressure filtration)

Efficiency (suction / return line filtration)

Recommended inlet screen mesh size

Unit

bar [psi]

mm2/s [SUS]

°C [°F]

-

β-ratio

µm 100 – 125

All sizes

480 [7000]

510 [7400]

10 [145]

3 [44]

5 [73]

0.3 [4.35]

All sizes

7 [49]

12-80 [66-366]

1600 [7416]

-40 [-40]

104 [220]

115 [240]

22/18/13

β

= 75 (β10 ≥ 10)

15-20

β

= 75 (β10 ≥ 2)

35-45

12 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Vg • n

1000 •

v

Qe =

Vg • p •

mh

20 •

Me =

Qe • p •

t

600

=

Me • n

9550

Pe=

n =

Qe • 1000 •

v

V

g

Vg • n

231 •

v

Qe =

Vg • p •

mh

2 •

Me =

Vg • n • p •

t

396 000

Pe=

n =

Qe • 231 •

v

V

g

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Technical specifications

Determination of nominal motor size

Based on SI units Based on US units

Where:

Q

Input flow (l/min)

e

M

Output torque (N•m)

e

P

Output power (kW)

e

n Speed (min-1) V

Motor displacement per rev. (cm3/rev)

g

p

High pressure (bar)

high

p

Low pressure (bar)

low

∆p High pressure minus Low pressure (bar) η

Motor volumetric efficiency

v

η

Mechanical-hydraulic efficiency

mh

η

Motor total efficiency (ηv • ηmh)

t

Where:

Q

Input flow [US gal/min]

e

M

Output torque [lb•in]

e

P

Output power [hp]

e

n Speed [rpm] V

Motor displacement per rev. [in3/rev]

g

p

High pressure [psi]

high

p

Low pressure [psi]

low

∆p High pressure minus Low pressure [psi] η

Motor volumetric efficiency

v

η

Mechanical-hydraulic efficiency

mh

η

Motor total efficiency (ηv • ηmh)

t

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 13

W

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Case pressure

Under normal operating conditions, case pressure must not exceed the rated pressure. Momentary case pressure exceeding this rating is acceptable under cold start conditions, but still must stay below the maximum pressure rating.

The minimum pressure provides proper lubrication at high speeds. Operation with case pressure in excess of these limits may result in external leakage due to damage to

seals, gaskets, and/or housings.

Case pressure

Parameter

Rated

Case pressure

Speed range

Rated speed is the speed limit recommended at full power condition and is the highest value at which

normal life can be expected. Maximum speed is the highest operating speed permitted and cannot be exceeded without reduction

in the life of the product or risking immediate failure and loss of driveline power (which may create a safety hazard). In the range between rated and maximum speed please contact your Danfoss Power Solutions representative.

Maximum (cold start)

Minimum (at rated speed)

Unit

bar [psi]

All sizes

3 [44]

5 [73]

0.3 [4.35]

Warning

The loss of hydrostatic drive line power in any mode of operation (e.g., forward, reverse, or “neutral”) may cause the loss of hydrostatic braking capacity. A braking system, redundant to the hydrostatic transmission must, therefore, be provided which is adequate to stop and hold the system should the condition develop.

Speed limits

Features Unit

at max. displ.

Rated speed

at min. displ.

min-1(rpm)

at max. displ.

Maximum speed

at min. displ.

060 080 110 160 250

3600 3100 2800 2500 2200

5600 5000 4500 4000 3400

4400 4000 3600 3200 2700

7000 6250 5600 5000 4250

Size

14 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Rated speed at min. displacement

Rated speed at max. displacement

Acceptable operating range

Maximim speed at min. displacement

Maximum speed at max. displacement

Curve determined by rated flow

Min. displacement Max. displacement

P001 781E

Speed min

-1

(rpm)

Motor angle (degrees)

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Speed limits

For operation within the range above the acceptable range contact Danfoss Power Solutions representative.

Pressure limits

System pressure is the dominant operating variable affecting hydraulic unit life. High pressure, which results from high load, reduces expected life in a manner similar to the affects of high load on other mechanical assemblies such as engines and gear boxes. There are load-to-life relationships for the rotating group and for the shaft anti-friction bearings.

Continuous pressure is the pressure at which the hydrostatic system could operate continuously and still achieve acceptable hydrostatic life. This pressure level varies depending on operating speed, and on the life requirements for a particular application. While most mobile applications require system pressure to vary widely during operation, a “weighted average” pressure can be derived from a machine duty cycle. (A duty cycle is a means of quantifying the pressure and speed demands of a particular system on a percent time basis). Once a duty cycle has been determined or estimated for a specific application, contact your Danfoss representative for system life ratings for the application.

Maximum delta pressure is the highest intermittent pressure allowed, and is the relief valve setting. It is determined by the maximum machine load demand. For most systems, the load should move at this pressure.

Maximum pressure is assumed to occur a small percentage of operating time, usually less than 2 % of the total. Both the continuous and maximum pressure limits must be satisfied to achieve the expected life.

Minimum low pressure must maintained under all operating conditions to avoid cavitation.

System pressure range, input

Maximum delta pressure Minimum low pressure Maximum pressure

480 [7000 psi] 10 [145 psi] 510 [7400 psi]

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 15

W

Loop flushing relief valve

Loop flushing shuttle spool

P001 782E

A B

P001 830

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Loop flushing

An integral non-adjustable loop flushing valve is incorporated into all these motors. Installations that require fluid to be removed from the low pressure side of the system circuit because of cooling requirements or contamination removal will benefit from loop flushing.

The integral loop flushing valve is equipped with an orificed charge pressure relief valve designed with a cracking pressure of 16 bar [232 psi].

Valves are available with several orifice sizes to meet the flushing flow requirements of all system operating conditions.

The total system charge pump flow should be of sufficient volume to accommodate:

The number of motors in the system

•

System efficiency under worst case conditions

•

Pump control requirements

•

External needs

•

Although charge pump sizing requires the consideration of many system variables, the following table gives a recommendation of what charge pump displacement may be required to accommodate the flushing flow of each available charge relief valve orifice.

Recommended charge pump displacement

Loop flushing valve E4, E6 F0 F3 G0 G3 H0

Charge pump size (cm3) 8 11 14 17 or 20 26 34, 47 or 65

Warning

The loss of hydrostatic drive line power in any mode of operation (e.g., forward, reverse, or “neutral” mode) may cause the loss of hydrostatic braking capacity. A braking system, redundant to the hydrostatic transmission must, therefore, be provided which is adequate to stop and hold the system should the condition develop.

Loop flushing valve

Hydraulic schematic

16 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

0 5

[1.3]10[2.6]15[4.0]20[5.3]

Case flow l/min [US gal/min]

Low system pressure minus case pressure

bar [psi]

25

[6.6]30[8.0]35[9.2]40[10.6]

[508]

35

[363]

25

[218]

15

[73]

5

P001 860E

E4 E6 F0 F3 G0 G3 H0

C

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Case flow characteristic

Equation:

Where:

Q

– flushing flow per motor

Flush

Q

– charge flow at operating speed

Charge

kMo – number of motors feeded by one pump Q

– sum of external leakages

Leak

Minimum displacement limiter

Hydraulic fluids

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 17

Q

includes:

Leak

motor leakage

•

pump leakage + internal consumers:

•

8 l/min [2.11 US gal/min] for displacement control pumps or

‒

for non-feedback controlled pumps at 200 bar [2900 psi]

‒

external consumers:

•

e.g. brakes, cylinders, and other pumps

‒

All Series 51 and 51-1 motors incorporate mechanical displacement limiters. The minimum displacement of the motor is preset at the factory with a set screw in the motor housing. A

tamper-proof cap is provided.

Ratings and data are based on operating with hydraulic fluids containing oxidation, rust and foam inhibitors. These fluids must possess good thermal and hydrolytic stability to prevent wear, erosion and corrosion of the internal components.

Fire resistant fluids are also suitable at modified operating conditions. Please see Danfoss literature Technical Information Hydraulic Fluids and Lubricants for more information.

For more information contact your Danfoss representative.

Caution

It is not permissible to mix hydraulic fluids.

Suitable hydraulic fluids:

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Hydraulic fluids per DIN 51 524, part 2 (HLP)

•

Hydraulic fluids per DIN 51 524, part 3 (HVLP)

•

API CD, CE and CF engine fluids per SAE J183

•

M2C33F or G automatic transmission fluids (ATF)

•

Agricultural multi purpose oil (STOU)

•

Premium turbine oils (for Premium turbine oils contact your Danfoss representative).

•

Temperature and viscosity

Temperature and viscosity requirements must be concurrently satisfied. The data shown in the tables assume petroleum-based fluids, are used.

The high temperature limits apply at the hottest point in the transmission, which is normally the motor case drain. The system should generally be run at or below the rated temperature. The maximum temperature is based on material properties and should never be exceeded.

Cold oil will generally not affect the durability of the transmission components, but it may affect the ability to flow oil and transmit power; therefore temperatures should remain 16 °C [30 °F] above the pour point of the hydraulic fluid. The minimum temperature relates to the physical properties of component materials.

For maximum unit efficiency and bearing life the fluid viscosity should remain in the recommended operating range. The minimum viscosity should be encountered only during brief occasions of maximum ambient temperature and severe duty cycle operation. The maximum viscosity should be encountered only at cold start.

Heat exchangers should be sized to keep the fluid within these limits. Testing to verify that these temperature limits are not exceeded is recommended.

Filtration system

Viscosity and temperature range

Features Unit

Minimum intermittent

Viscosity

Temperature range

1)

At the hottest point, normally case drain port.

2)

Minimum: cold start, short term t<3 min, p<50 bar, n<1000 rpm.

Recommended range

Maximum intermittent

Minimum

1)2)

Rated

Maximum intermittent

mm2/s [SUS]

°C [°F]

All sizes

7 [49]

12-80 [66-366]

1600 [7416]

-40 [-40]

104 [220]

115 [240]

To prevent premature wear, ensure that only clean fluid enters the hydrostatic transmission circuit. A filter capable of controlling the fluid cleanliness to ISO 4406, class 22/18/13 (SAE J1165) or better, under normal operating conditions, is recommended.These cleanliness levels cannot be applied for hydraulic fluid residing in the component housing/case or any other cavity upon delivery from the factory.

The filter may be located on the pump (integral) or in another location (remote or suction). The integral filter has a filter bypass sensor to signal the machine operator when the filter requires changing. Filtration strategies include suction or pressure filtration. The selection of the filter strategy depends on a number of factors including the contaminant ingression rate, the generation of contaminants in the system, the required fluid cleanliness, and the desired maintenance interval. Filters are selected to meet the above requirements using rating parameters of efficiency and capacity.

Filter efficiency can be measured with a Beta ratio (βX). For simple suction-filtered closed circuit transmissions and open circuit transmissions with return line filtration, a filter with a β-ratio within the

18 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

C

W

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Fluid selection

range of β

= 75 (β10 ≥ 2) or better has been found to be satisfactory. For some open circuit systems,

35-45

and closed circuits with cylinders being supplied from the same reservoir, a higher filter efficiency is recommended. This also applies to systems with gears or clutches using a common reservoir. For these systems, a charge pressure or return filtration system with a filter β-ratio in the range of β

= 75 (β10 ≥

15-20

10) or better is typically required. Because each system is unique, only a thorough testing and evaluation program can fully validate the

filtration system. For more information, see Design Guidelines for Hydraulic Fluid Cleanliness, Technical Information BC00000095.

Filter βx-ratio is a measure of filter efficiency defined by ISO 4572. It is defined as the ratio of the number of particles greater than a given diameter (“x” in microns) upstream of the filter to the number of these particles downstream of the filter.

Filtration, cleanliness level and βx-ratio (recommended minimum)

Cleanliness per ISO 4406

Efficiency βx (charge pressure filtration)

Efficiency βx (suction and return line filtration)

Recommended inlet screen mesh size

22/18/13

β

= 75 (β10 ≥ 10)

15-20

β

= 75 (β10 ≥ 2)

35-45

100 – 125 µm

Ratings and performance data are based on operating with hydraulic fluids containing oxidation, rust and foam inhibitors. These fluids must possess good thermal and hydrolytic stability to prevent wear, erosion, and corrosion of motor components.

Reservoir

Independent braking system

Caution

Never mix hydraulic fluids of different types.

Fire resistant fluids are also suitable at modified operating conditions. For more information, see Hydraulic Fluids and Lubricants, Technical Information BC00000093.

The function of the reservoir is to remove air and to provide make up fluid for volume changes associated with fluid expansion or contraction, possible cylinder flow, and minor leakage.

The reservoir should be designed to accommodate maximum volume changes during all system operating modes and to promote deaeration of the fluid as it passes through the tank.

A minimum reservoir volume equal to 1/2 to 1 1/2 times charge pump flow/min is suggested. This allows 30 seconds fluid dwell for removing entrained air at the maximum return flow. This is usually adequate to allow for a closed reservoir (no breather) in most applications. The reservoir outlet to the charge pump inlet should be above the bottom of the reservoir to take advantage of gravity separation and prevent large foreign particles from entering the charge inlet line.

The reservoir inlet (fluid return) should be positioned so that the flow to the reservoir is discharged below the normal fluid level, and also directed into the interior of the reservoir for maximum dwell and efficient deaeration.

Warning

The loss of hydrostatic drive line power in any mode of operation (e.g., forward, reverse, or “neutral” mode) may cause the loss of hydrostatic braking capacity. A braking system, redundant to the hydrostatic transmission must, therefore, be provided which is adequate to stop and hold the system should the condition develop.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 19

L1 • 1500

n

2

L2 =

hours

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Motor bearing life

The rated motor bearing life L bearings, when operating at a speed of n = 1500 min-1 (rpm) with a charge pressure of 20 bar [290 psi] and without external shaft load.

h10

shown in the table below is based on a 90 % survival rate of shaft

The rated motor bearing life L

Frame Size Effective ∆ pressure

bar [psi]

140 [2030] 19 800 18 530 16 370

060

080

110

160

250

210 [3050] 6320 5960 5340 280 [4060] 2740 2600 2350 140 [2030] 14 420 13 580 12 120 210 [3050] 4610 4370 3960 280 [4060] 2000 1910 1750 140 [2030] 15 800 14 890 13 330 210 [3050] 5040 4790 4350 280 [4060] 2180 2090 1920 140 [2030] 15 670 14 770 13 200 210 [3050] 5005 4750 4300 280 [4060] 2170 2070 1900 140 [2030] 11 760 11 130 10 020 210 [3050] 3750 3580 3260 280 [4060] 1630 1560 1440

h10

(hours)

Motor angle

6° 15° 32°

Lifetimes for speeds other than 1500 min-1 (rpm) can be calculated from:

Where: Units:

L

==Rated L10 life at 1500 min-1 (rpm)

1

n

2

Operating speed

hours min-1 (rpm)

Contact your Danfoss Power Solutions representative for bearing life values at other pressure and angle.

20 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Fr

35°

Fr

A

X

1

A

SAE-Flange design per ISO 3019/1

DIN-Flange design per ISO 3019/2

Cartridge Flange design

35°

Fa

X

1

Fr

X

1

X2 < X

1

X2 > X

1

X2 < X

1

X2 > X

1

X2 < X

1

X2 > X

1

P001 166E

35°

Fr

35°

OPTIMUM LOAD ORIENTATION

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

External shaft loads

Series 51 and 51-1 motors are designed with bearings that can accept external radial and thrust loads. The external radial shaft load limits are a function of the load position, the load orientation, and operating

conditions of the unit.

External shaft load orientation

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 21

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Radial and thrust loads to the output shaft

The table below provides the following information:

•

The maximum allowable radial load (Fr) based on the distance (X1) from the mounting flange to the load.

•

The maximum allowable axial load (Fa).

•

The actual distance of Fr for a given application from the mounting flange to the load (X2).

•

The basic distance (A).

•

Fa/∆p ratio of allowable axial load, dependent upon the system pressure.

Radial and thrust loads to the output shaft

Feature Symbol Unit

Maximum allowable radial load

Max. allow. axial load at zero rpm, or running in the idle pressure

Max. allowable bending moment

Max. allowable axial load at pressure

Distance SAE mounting flange

Distance DIN mounting flange 57.2

Distance Cartridge mount. flange 117.6

Basic distance A 25.2

– = not available

060 080 110 160 250

Fr

Fa 1100

M

Fa/∆p

X

1

N [lb]

N•m [lb•in]

N/bar [lb/1000 psi]

mm [in]

10 000 [2248]

[247]

252 [2230]

10.4 [161]

33.6 [1.32]

[2.25]

[4.63]

[0.99]

12 000 [2698]

1400 [315]

307 [2717]

12.6 [195]

33.6 [1.32]

57.6 [2.27]

136.1 [5.36]

25.6 [1.01]

Frame Size

14 000 [3147]

1800 [405]

766 [6780]

15.2 [236]

62.7 [2.47]

94.7 [3.73]

177.5 [7.0]

54.7 [2.15]

18 000 [4047]

2500 [562]

805 [7125]

19.2 [298]

52.7 [2.07]

84.7 [3.33]

– –

44.7 [1.76]

26 000 [5845]

4500 [1012]

970 [8585]

26.4 [409]

45.3 [1.78]

–

37.3 [1.47]

The values in the table are maximum values and are not allowed under continuous load conditions.

Allowable external shaft load, when shaft load distance is different from standard

Use this formula to calculate maximum allowable radial load when max. shaft load distance X2 is different from X1:

Metric system: Inch system:

Metric or Inch system:

X2 > X1 Fr = Fr

max

N [lbf]

X2 is the actual distance of Fr from the mounting flange to the load for a given application. If X2< X1, Fr

could also be calculated by the first equation, but in addition the bearing life has to be checked.

Contact your Danfoss representative for load ratings of specific shafts or when the load orientation deviates more than 35° in either direction from the optimum.

22 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Efficiency

%

v

o

l

u

m

e

t

r

i

c

e

f

i

c

i

e

n

c

y

η

v

=

2

1

0

b

a

r

[

3

0

5

0

p

s

i

]

100

95

90

85

80

0

25

50

75

100

Speed % of rated speed

P001 155E

η

t

=

4

2

0

b

a

r

[

6

0

9

0

p

s

i

]

t

o

t

a

l

e

f

i

c

i

e

n

c

y

η

t

=

2

1

0

b

a

r

[

3

0

5

0

p

s

i

]

η

v

=

4

2

0

b

a

r

[

6

0

9

0

p

s

i

]

Speed% of rated speed

0

System pressure bar [psi]

420

[6090]

280

[4060]

140

[2030]

0

25

50

75

100

74.5%

84.5%

90.5%

93.5%

94.5%

P001 137E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Efficiency graphs and maps

This graph provides the volumetric and overall efficiencies for a typical Series 51 and 51-1 motor operating at maximum displacement, system pressures of 210 and 420 bar [3050 and 6090 psi], and a fluid viscosity of 8.2 mm²/s [53 SUS]. These efficiencies can be used for all frame sizes.

Overall and volumetric efficiency at maximum displacement

This graph shows typical overall efficiencies for Series 51 and 51-1 motors operating at maximum displacement and system pressures up to 420 bar [6090 psi], and a fluid viscosity of 8.2 mm²/s [53 SUS]. These efficiencies can be used for all frame sizes.

Overall efficiency at maximum displacement

This graph shows typical overall efficiencies for Series 51 and 51-1 motors operating at 30% of maximum displacement and system pressures up to 420 bar [6090 psi], and a fluid viscosity of 8.2 mm²/s (53 SUS). These efficiencies can be used for all frame sizes.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 23

80

η

v

=

4

2

0

b

a

r

[

6

0

9

0

p

s

i

]

v

o

l

u

m

e

t

r

i

c

e

f

fi

c

i

e

n

c

y

η

v

=

2

1

0

b

a

r

[

3

0

5

0

p

s

i

]

η

t

=

4

2

0

b

a

r

[

6

0

9

0

p

s

i

]

25 50

75

1000

60

65

70

75

85

90

95

100

Efficiency %

Speed % of rated speed

o

v

e

r

a

l

e

f

fi

c

i

e

n

c

y

η

t

=

2

1

0

b

a

r

[

3

0

5

0

p

s

i

]

P001 156E

Speed % of rated speed

0

System pressure bar [psi]

420

[6090]

280

[4060]

140

[2030]

0

25

50

75

100

P001 138E

61%

71%

77%

80%

81%

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Overall and volumetric efficiency at 30% of maximum displacement

This graph shows typical overall efficiencies for Series 51 and 51-1 motors operating at 30% of maximum displacement and system pressures up to 420 bar [6090 psi], and a fluid viscosity of 8.2 mm²/s (53 SUS). These efficiencies can be used for all frame sizes.

Overall efficiency at 30% of maximum displacement

24 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

P001 492

Turck Eurofast Connector

4 pin

(Supplied connector)

IP Rating (DIN 40 050) IP 67

Mating connector

straight right angle

No.: K14956 No.: K14957

Id.-No.: 500724 Id.-No.: 500725

P001 755E

1

2

3

4

Keyway (Ref)

Red White Black Green

P002 108E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Speed sensor

An optional speed sensor for direct measurement of speed is available. This sensor may also be used to sense the direction of rotation. A special magnetic speed pick-up ring is pressed onto the outside diameter of the shaft and a Hall effect sensor is located in the motor housing. The sensor accepts supply voltage and outputs a digital pulse signal in response to the speed of the ring. The output changes its high/low state as the north and south poles of the permanently magnetized speed ring pass by the face of the sensor. The digital signal is generated at frequencies suitable for microprocessor based controls. The sensor is available with different connectors (see below). The SAE and DIN flange motors use a flat end speed sensor. The cartridge flange motors use a conical end speed sensor.

Data magnetic speed pick-up ring

Frame size

Pulze/Rev 45 49 54 61 71

Speed sensor technical data

Supply voltage Supply voltage regulated Required current Maximum current Maximum frequency Voltage "high" Voltage "low" Temperature range

1)

It is not acceptable to energize the 4.5-8.5 VDC speed sensor with 12 VDC battery voltage; it must be energized by a regulated power supply. If it is desirable to energize the sensor with battery voltage, contact your Danfoss representative for an optional speed sensor.

1)

060 080 110 160 250

4.5 – 8.5 V

15 VDC max.

12 mA at 5 VDC (no load)

20 mA at 5 VDC and 1 Hz

15 kHz

Supply voltage -0.5 VDC min.

0.5 VDC max.

-40 to 110 °C [-40 to 230 °F]

DC

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 25

Speed sensor with Turck Eurofast 4-pin connector

Pin 1 or A: Supply voltage Pin 2 or B: Direction of rotation Pin 3 or C: Speed signal, digital Pin 4 or D: Ground common

Speed sensor with Packard Weather-Pack 4-pin connector

A B C

D

Packard Weather-Pack

4 pin

(Supplied Connector)

Mating Connector

No.: K03379

Id.-No.: 505341

P001 758E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General technical specifications

Contact your Danfoss representative for more information.

Typical control and regulator applications

Application Control / Regulators

without PCOR with PCOR with PCOR and BPD

N1 HZ E1, E2, E7 EP, EQ F1, F2 L1, L2, L7 TA T1, T2 TH HS TA T1, T2 EP, EQ D7, D8 HS

Wheel loader

Roller compactor

Paver wheeled

Paver tracked

Sweeper

Trencher

Excavator wheeled

Fork lift truck

Agricultural

Forestry

Telehandler

Railroad

Snow groomer

Snow blower

Crane

1)

2)

3)

Suitable configuration

1)

Propel function

2)

Blow drive function

3)

Winch function

The table above is provided to assist in selecting controls and regulators for various applications. These recommendations are based on experience with a wide range of applications.

Contact your Danfoss Power Solutions representative for more information on control selection.

26 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

X1

(M3)

M5

B

M4

L1

N

L2

A

P001 779E

n

min.

disp.

T3

T2

System pressure bar [psi]

Servo pressure bar [psi]

0

200

[2900]

100

[1450]

10

[145]

20

[290]

30

[435]

300

[4350]

400

[5800]

minimum servo pressure under all conditions

P001 877E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Option N1NN – hydraulic two-position control for 51-1 (frame size: 060, 080, 110)

A, B = Main pressure lines L1, L2 = Drain lines M4 = Gauge port servo pressure M5 = Gauge port servo supply pressure X1 (M3) = Control pressure T1, T2, T3 = Optional orifices N = Speed sensor

Displacement changes from maximum displacement to minimum displacement position, under load, as control pressure at port X1 (M3) is equal to low pressure or higher.

Control pressure on port X1 (M3)

No pressure on port = maximum displacement Control pressure on port = minimum displacement Maximum control pressure = 50 bar [725 psi]

The graph shows the necessary external and internal (= low system pressure) control pressure X1, which is needed to stroke the motor depending on high system pressure.

Control N1NN necessary control pressure

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 27

P001 875E

min

max

Control pressure

Displacement

T8T3T7

T1

T2

max. disp.

M2

X1

M7

B

M5

L1

M1

M4L2

A

M3 N

P100 177E

n

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Control operation N1NN

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

Option HZB1 – hydraulic two-position control for 51 (frame size: 160, 250)

A, B = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for A and B M3, M4 = Servo pressure M5 = Gauge port servo supply pressure internal M7 = Gauge port control pressure X1 = Control pressure T1, T2, T3, T7, T8 = Optional orifices N = Speed sensor

Displacement can be changed hydraulically under load from minimum displacement to maximum displacement and vice versa by control pressure to port X1. For proportional control see Option HZB1 –

hydraulic proportional control for 51 (all frame sizes) on page 62

Control pressure on port X1

28 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

P100 179E

Control pressure Δ bar [psi]

0

3

[44]

min

max

Displacement

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

No pressure on port = maximum displacement Control pressure on port = minimum displacement Maximum control pressure = 50 bar [725 psi] The standard control start point setting = 3 bar [44 psi]

Control operation HZB1

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 29

M3

T3

M3 with Electric brake pressure defeat

with Hydraulic brake pressure defeat

without Brake pressure defeat

XB

XA

T3

M3

T3

min. disp.

n

B

A

L1

M4

L2

N

P001 834E

min max

Displacement

Ramp < 10 bar

[145 psi]

Regulator start

Setting range

130

[1890]

370

[5370]

System pressure Δ p bar [psi]

P001 173E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options TA** – pressure compensator control for 51-1 (frame size: 060, 080, 110)

Circuit diagram–motor with pressure compensator control TA**

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M3, M4 = Servo pressure XA, XB = Control pressure port brake pressure defeat (BPD) T3 = Orifice N = Speed sensor

Displacement is regulated automatically between minimum and maximum displacement in response to system pressure.

Regulator start = minimum displacement Regulator end = maximum displacement Regulator start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi]. Pressure ramp from regulator start pressure (with motor at minimum displacement) until maximum

displacement is reached is less than 10 bar [145 psi]. This ensures optimal power utilization throughout the entire displacement range of the motor.

Control operation TA**

30 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

A B

P001752

2 1

P001751

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Option TACA: pressure compensator configuration with hydraulic Brake Pressure Defeat

A shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down. Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls.

The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, based on the following table:

Motor rotation High pressure port Control pressure on port*PCOR function

CW A XA yes CW A XB no CCW B XA no CCW B XB yes

*

Differencial control pressure between port XA/XB:

∆p

= 0.5 bar [7 psi]

min

∆p

= 50 bar [725 psi]

max

Options TAD1, TAD2, TAD7: pressure compensator configuration with electric BPD

A solenoid-switched valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down.

The solenoid valve must be controlled by an external electric signal, based on direction of motor rotation, see the following table:

Motor rotation High pressure port Solenoid PCOR function

CW A energized yes CW A non energized no CCW B energized no CCW B non energized yes

TAD* solenoid connectors

Configuration Voltage / Electric power

TAD1 12 VDC / 34 W

TAD2 24 VDC / 34 W

TAD7 12 VDC / 34 W

Solenoid plug face for DIN 46350 Mating connector No.: K09129 Id. No.: 514117

AMP Junior Timer two-pin Mating connector No.: K19815 Id. No.: 508388

Connector (supplied)

Option TAC2: pressure compensator configuration without Brake Pressure Defeat

Pressure compensator functions when the motor is running in motor mode as well as in pump (deceleration) mode.

Configuration option High pressure port PCOR function

TAC2 A and B yes

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 31

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

32 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

n

max. disp.

T7 T8

T2

T1

T3

B

M2

(X3)

M5

L1

with Brake pressure defeat

without Brake pressure defeat

M1

N

M3M4

L2

A

P001 836E

XB

XA

X4 X4

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options TA** – pressure compensator controls for 51 (frame size 160, 250)

Circuit Diagram–Motor with Pressure Compensator Control TA**

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for A and B M3, M4 = Gauge port servo pressure M5 (X3) = Gauge port servo supply XA, XB = Control pressure ports, brake pressure defeat X4 = Gauge port pressure compensator T1, T2, T3, T7, T8 = Optional orifices N = Speed sensor

Displacement is regulated automatically between minimum and maximum displacement in response to system pressure.

Regulator start = minimum displacement Regulator end = maximum displacement

Regulator start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi]. Pressure ramp from regulator start pressure (with motor at minimum displacement) until maximum

displacement is reached is less than 10 bar [145 psi]. This ensures optimal power utilization throughout the entire displacement range of the motor.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 33

min max

Displacement

Ramp < 10 bar

[145 psi]

Regulator start

Setting range

130

[1890]

370

[5370]

System pressure Δ p bar [psi]

P001 173E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Control operation TA**

Option TAC0: pressure compensator configuration with hydraulic Brake Pressure Defeat

A shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down.

Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls.

The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, see the following table.

Motor rotation High pressure port Control pressure on port*PCOR function

CW A XA no CW A XB yes CCW B XA yes CCW B XB no

*

Differencial control pressure between port XA/XB:

∆p

= 0.5 bar [7 psi]

min

∆p

= 50 bar [725 psi]

max

Option TAC2: pressure compensator configuration without Brake Pressure Defeat

Pressure compensator functions when the motor is running in motor mode as well as in pump (deceleration) mode.

Configuration option High pressure port PCOR function

TAC2 A and B yes

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

34 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

n

min.

disp.

B

M4

L1

N

L2

A

P001 835E

T3

M3

X1

T3

M3

XB

XA

X1

T3

M3

X1

with Electric brake pressure defeat

with Hydraulic brake pressure defeat

without Brake pressure defeat

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options TH** – hydraulic two-position control for 51-1 (frame size: 060, 080, 110)

Circuit diagram – motor with two-position control TH**

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for A and B M3, M4 = Gauge port servo pressure M5 (X3) = Gauge port servo supply XA, XB = Control pressure ports, brake pressure defeat X1 = Hydraulic two-position signal X4 = Gauge port pressure compensator T1, T2, T3, T7, T8 = Optional orifices N = Speed sensor

Displacement can be changed hydraulically under load from minimum displacement to maximum displacement and vice versa.

Pressure on port X1 must be equal to the pressure of the motor case ± 0.2 bar [3.0 psi] this keeps the motor at minimum displacement.

Pressure from 10 bar [145 psi] to 35 bar [510 psi] above case pressure on port X1 strokes the motor to maximum displacement.

Pressure Compensator OverRide (PCOR)

The control can be overridden by PCOR using high loop pressure. When the PCOR activates, the motor displacement increases toward maximum. Pressure ramp from

PCOR start pressure (with motor at minimum displacement) until maximum displacement is reached is less than 10 bar [145 psi]. This ensures optimal power utilization throughout the entire displacement range of the motor.

PCOR start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi].

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 35

min.

[145 psi] min. 10 bar

[510 psi] max. 35 bar

max.

Displacement

Hydraulic two-positioncontrol

PCOR start

setting range

Ramp < 10

[145]

130

[1890]

370 [5370]

Pressure compensator override bar, [psi]

P001 776E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Control operation TH**

Option THCA: pressure compensator configuration with hydraulic Brake Pressure Defeat

A shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down. Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls. The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, based on the following table:

Pressure compensator operation

Motor rotation High pressure port Control pressure on port*PCOR function

CW A XA yes CW A XB no CCW B XA no CCW B XB yes

*

Differencial control pressure between port XA / XB: ∆p ∆p

Options THD1, THD2, THD7: pressure compensator configuration with electric BPD

A solenoid-switched valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down. The solenoid valve must be controlled by an external electric signal, based on direction of motor rotation, see the following table:

Motor rotation High pressure port Solenoid PCOR function

CW A energized yes CW A non energized no CCW B energized no CCW B non energized yes

= 0.5 bar [7 psi];

min

= 50 bar [725 psi]

max

36 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

A B

P001752

2 1

P001751

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

THD* solenoid connectors

Configuration Voltage / Electric power

THD1

THD2 24 VDC / 34 W

THD7 12 VDC / 34 W

12 VDC / 34 W

Solenoid plug face for DIN 46350 Mating connector No.: K09129 Id. No.: 514117

AMP Junior Timer two-pin Mating connector No.: K19815 Id. No.: 508388

Connector (supplied)

Option THC2: pressure compensator configuration without Brake Pressure Defeat

Pressure compensator functions when the motor is running in motor mode as well as in pump (deceleration) mode.

Configuration option High pressure port PCOR function

THC2 A and B yes

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 37

max. disp.

A

L2

M4

M3

N

M1

L1

X1X1

M2

B

(X3)

M5

P001 837E

n

T8

T1

T2 T3

T7

XB

XA

X4

with Brake pressure defeat

without Brake pressure defeat

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options TH** – hydraulic two-position control for 51 (frame size 160, 250)

Circuit diagram – motor with two-position control TH**

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for A and B M3, M4 = Gauge port servo pressure M5 (X3) = Gauge port servo supply XA, XB = Control pressure ports, brake pressure defeat X1 = Hydraulic two-position signal X4 = Gauge port pressure compensator T1, T2, T3, T7, T8 = Optional orifices N = Speed sensor

Pressure Compensator OverRide (PCOR)

The control can be overridden by PCOR using high loop pressure. When the PCOR activates, the motor displacement increases toward maximum. Pressure ramp from

PCOR start pressure (with motor at minimum displacement) until maximum displacement is reached is less than 10 bar [145 psi]. This ensures optimal power utilization throughout the entire displacement range of the motor.

PCOR start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi].

38 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

min.

[145 psi] min. 10 bar

[510 psi] max. 35 bar

max.

Displacement

Hydraulic two-positioncontrol

PCOR start

setting range

Ramp < 10

[145]

130

[1890]

370 [5370]

Pressure compensator override bar, [psi]

P001 776E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Control operation TH**

Option THC0: pressure compensator configuration with hydraulic BPD

A shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down. Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls.

The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, see the following table:

Pressure compensator operation

Motor rotation High pressure port Control pressure on port*PCOR function

CW A XA no CW A XB yes CCW B XA yes CCW B XB no

*

Differencial control pressure between port XA / XB:

∆p

= 0.5 bar [7 psi]

min

∆p

= 50 bar [725 psi]

max

Option THC2: pressure compensator configuration without Brake Pressure Defeat

Pressure compensator functions when the motor is running in motor mode as well as in pump (deceleration) mode.

Configuration option High pressure port PCOR function

THC2 A and B yes

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 39

n

min.

disp.

T3

T2

M4

B

M3

M5

L1

N

L2

A

P001 780E

min

12V /24V

max

Displacement

Control voltage

P001 870E

Electrohydraulic

two-position control

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options E1B1, E2B1, E7B1 – electrohydraulic two-position control for 51-1 (frame size 060, 080, 110)

Circuit diagram – motor with EH two-position control E1B1, E2B1, E7B1

A, B = Main pressure lines L1, L2 = Drain lines M3, M4 = Servo pressure M5 = Gauge port servo supply pressure internal T2, T3 = Optional orifices N = Speed sensor

Displacement can be changed electrohydraulically under load from maximum displacement to minimum displacement and vice versa, by using a built-in solenoid valve.

Control operation E1B1, E2B1, E7B1

Options:

Solenoid off = max. displacement Solenoid on = min. displacement

Pilot pressure for solenoid:

internal = low pressure The graph shows the necessary servo pressure (= low pressure), which is needed to stroke the motor,

depending on high system pressure and the pump or motor mode.

40 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

System pressure bar [psi]

Servo pressure bar [psi]

0

200

[2900]

100

[1450]

10

[145]

20

[290]

30

[435]

300

[4350]

400

[5800]

min. pilot pressure in pump mode to shift from min to max angle

min. pilot pressure at all other conditions motor and pump mode in both directions

P001 878E

A B

P001752

2 1

P001751

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Control E*B1 necessary low system pressure

E1B1, E2B1, E7B1 solenoid connectors

Configuration Voltage / Electric power

E1B1 12 VDC / 34 W

Solenoid plug face for DIN 46350 Mating connector No.: K09129

E2B1 24 VDC / 34 W

Id. No.: 514117

AMP Junior Timer two-pin

E7B1 12 VDC / 34 W

Mating connector No.: K19815 Id. No.: 508388

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

Connector (supplied)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 41

n

max. disp.

T3

T2

T1

T7 T8

P100 180E

B

M8

M7

M2

L1

M1

N

M3

M4

L2

A

M5

min

12V /24V

max

Displacement

Control voltage

P001 870E

Electrohydraulic

two-position control

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options E1A5, E2A5 – electrohydraulic two-position control for 51 (frame size 160, 250)

Circuit diagram – motor with control options: E1A5, E2A5

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for A and B M3, M4 = Gauge port servo pressure M5 = Gauge port servo supply pressure, internal M7, M8 = Gauge port control pressure, internal T1, T2, T3, T7, T8 = Optional orifices N = Speed sensor

Displacement can be changed electrohydraulically under load from maximum displacement to minimum displacement and vice versa, by using a built-in solenoid valve.

Control operation E1A5, E2A5

Options:

Solenoid off = max. displacement Solenoid on = min. displacement

Pilot pressure for solenoid:

42 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

A B

P001752

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

internal = low pressure

E1A5, E2A5 solenoid connectors

Configuration Voltage / Electric power

E1A5 12 VDC / 14.7 W

E2A5 24 VDC / 14.7 W

Solenoid plug face for DIN 46350 Mating connector No.: K09129 Id. No.: 514117

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

Connector (Supplied)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 43

n

min. disp.

T3

T2

M4

B

M3M5

L1

N

L2

A

P001 867E

min

12V /24V

max

Displacement

Control voltage

Electrohydraulic

two-position control

P001 871E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options F1B1, F2B1 – electrohydraulic two-position control for 51-1 (frame size 060, 080, 110)

Circuit diagram – motor with control options: F1B1, F2B1

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M3, M4 = Servo pressure M5 = Gauge port servo supply pressure internal T2, T3 = Optional orifices N = Speed sensor

Displacement can be changed electrohydraulically under load from maximum displacement to minimum displacement and vice versa, by using a built-in solenoid valve.

Control operation F1B1, F2B1

Options:

Solenoid off = min. displacement Solenoid on = max. displacement

Pilot pressure for solenoid:

internal = low pressure The graph shows the necessary servo pressure (= low pressure), which is needed to stroke the motor,

depending on high system pressure and the pump or motor mode.

44 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

System pressure bar [psi]

Servo pressure bar [psi]

0

200

[2900]

100

[1450]

10

[145]

20

[290]

30

[435]

300

[4350]

400

[5800]

min. pilot pressure in pump mode to shift from min to max angle

min. pilot pressure at all other conditions motor and pump mode in both directions

P001 879E

A B

P001752

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Control F1B1, F2B1 necessary low system pressure

F1B1, F2B1 solenoid connectors

Configuration Voltage / Electric power

F1B1 12 VDC / 14.7 W

Solenoid plug face for DIN 46350 Mating connector No.: K09129

F2B1 24 VDC / 14.7 W

Id. No.: 514117

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

Connector (Supplied)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 45

n

max. disp.

T2T1T3

T7 T8

P001 874E

L2

M4

M3

N

M1

L1

M2

M7M8

B

A

M5

min

12V /24V

max

Displacement

Control voltage

Electrohydraulic

two-position control

P001 871E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options F1A5, F2A5 – electrohydraulic two-position control for 51 (frame size 160, 250)

Circuit diagram – motor with control options: F1A5, F2A5

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for A and B M3, M4 = Gauge port servo pressure M5 = Gauge port servo supply pressure, internal M7, M8 = Gauge port control pressure, internal T1, T2, T3, T7, T8 = Optional orifices N = Speed sensor

Displacement can be changed electrohydraulically under load from maximum displacement to minimum displacement and vice versa, by using a built-in solenoid valve.

Control operation F1A5, F2A5

Options:

Solenoid off = min. displacement Solenoid on = max. displacement

Pilot pressure for solenoid:

46 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

A B

P001752

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

internal = low pressure

F1A5, F2A5 solenoid connectors

Configuration Voltage / Electric power

F1A5 12 VDC / 14.7 W

F2A5 24 VDC / 14.7 W

Solenoid plug face for DIN 46350 Mating connector No.: K09129 Id. No.: 514117

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

Connector (Supplied)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 47

n

T3

min. disp.

M4

L1

N

L2

A

B

M3

T3

M3

T3

M3

P001 784E

XB

XA

with Electric brake pressure defeat

with Hydraulic brake pressure defeat

without Brake pressure defeat

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options T1, T2, T7** – electrohydraulic two-position control for 51-1 (frame size 060, 080, 110)

Circuit diagram – motor with electrohydraulic two-position control T1**, T2**, T7**

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M3, M4 = Gauge port servo pressure XA, XB = Control pressure ports, brake pressure defeat T3 = Optional orifices N = Speed sensor

Displacement can be changed electrohydraulically under load from minimum displacement to maximum displacement and vice versa, by using a solenoid. When the solenoid is energized the motor has maximum displacement and the pressure compensator does not function.

Solenoid not energized = minimum displacement Solenoid energized = maximum displacement

Pressure Compensator Override (PCOR)

The control can be overridden by PCOR using high loop pressure. When the PCOR activates, the motor displacement increases toward maximum. Pressure ramp from PCOR start pressure (with motor at minimum displacement) until maximum displacement is reached is less than 10 bar [145 psi]. This ensures optimal power utilization throughout the entire displacement range of the motor.

PCOR start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi].

48 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

min.

12V/24V

max.

Displacement

Electrohydraulic two-positioncontrol

PCOR start

setting range

Ramp <

10 [145]

130

[1890]

370 [5 370]

Pressure compensator override bar, [psi]

P001 872E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Control operation T1**, T2**, T7**

Option T*CA: pressure compensator configuration with hydraulic Brake Pressure Defeat

A shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down.

Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls.

The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, see the following table:

Motor rotation High pressure port Control pressure on port*PCOR function

CW A XA yes CW A XB no CCW B XA no CCW B XB yes

*

Differencial control pressure between port XA/XB:

∆p

= 0.5 bar [7 psi]

min

∆p

= 50 bar [725 psi]

max

Options TD1, TD2, T* D7: pressure compensator configuration with electric BPD

A solenoid-switched valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down.

The solenoid valve must be controlled by an external electric signal, based on direction of motor rotation, see the following table:

Motor rotation High pressure port Solenoid PCOR function

CW A energized yes CW A non energized no CCW B energized no CCW B non energized yes

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 49

A B

P001752

2 1

P001751

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

T1D1, T2D2, T7D7 solenoid connectors

Configuration Voltage / Electric power

T1D1 12 VDC / 34 W

24 VDC / 34 W

T2D2

T7D7 12 VDC / 34 W

Solenoid plug face for DIN 46350 Mating connector No.: K09129 Id. No.: 514117

AMP Junior Timer two-pin Mating connector No.: K19815 Id. No.: 508388

Connector (Supplied)

Option T*C2: pressure compensator configuration without Brake Pressure Defeat

Pressure compensator functions when the motor is running in motor mode as well as in pump (deceleration) mode.

Configuration option High pressure port PCOR function

T*C2 A and B yes

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

50 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

n

T3T2

T1 T7 T8

max. disp.

B

L2 M4 M3

N

M1

L1

M2

M5

A

P001 785E

X4

XB

XA

X4

with Brake pressure defeat

without Brake pressure defeat

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options T1, T2 – electrohydraulic two-position control for 51 (frame size 160, 250)

Circuit diagram – motor with electrohydraulic two-position control T1**, T2**

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for A and B M3, M4 = Gauge port servo pressure M5 = Gauge port servo supply XA, XB = Control pressure ports, brake pressure defeat T1, T2, T3, T7, T8 = Optional orifices N = Speed sensor

Displacement can be changed electrohydraulically under load from minimum displacement to maximum displacement and vice versa, by using a solenoid. When the solenoid is energized the motor has maximum displacement and the pressure compensator does not function.

Solenoid not energized = minimum displacement Solenoid energized = maximum displacement

Pressure Compensator OverRide (PCOR)

The control can be overridden by PCOR using high loop pressure. When the PCOR activates, the motor displacement increases toward maximum. Pressure ramp from PCOR start pressure (with motor at minimum displacement) until maximum displacement is reached is less than 10 bar [145 psi]. This ensures optimal power utilization throughout the entire displacement range of the motor.

PCOR start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi].

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 51

min.

12V/24V

max.

Displacement

Electrohydraulic two-positioncontrol

PCOR start

setting range

Ramp <

10 [145]

130

[1890]

370 [5 370]

Pressure compensator override bar, [psi]

P001 872E

A B

P001752

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Control operation T1**, T2**

Option T*C0: pressure compensator configuration with hydraulic Brake Pressure Defeat

A shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down. Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls.

The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, see the following table:

Motor rotation High pressure port Control pressure on port*PCOR function

CW A XA no CW A XB yes CCW B XA yes CCW B XB no

*

Differencial control pressure between port XA/XB: ∆p

= 0.5 bar [7 psi]

min

∆p

= 50 bar [725 psi]

max

Option T*C2: pressure compensator configuration without Brake Pressure Defeat

Pressure compensator functions when the motor is running in motor mode as well as in pump (deceleration) mode.

Configuration option High pressure port PCOR function

T*C2 A and B yes

T1C2, T2C2 solenoid connectors

Configuration Voltage / Electric power

T1C2 12 VDC / 14.7 W

T2C2 24 VDC / 14.7 W

Solenoid plug face for DIN 46350 Mating connector No.: K09129 Id. No.: 514117

Connector (Supplied)

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

52 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

n

T3

T7T1 T8

T2

max. disp.

A

L2 M4

M3

N

M1

L1

M2

M8

M7

X1

M5

B

WITH BRAKE PRESSURE DEFEAT

WITHOUT BRAKE PRESSURE DEFEAT

P001 786E

T4

T6

U6

U7

T5

XA

XB

U6

U7

T5

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options EP, EQ – electrohydraulic proportional control for 51 (all frame sizes)

Circuit diagram – motor with electrohydraulic proportional control EP**, EQ**

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for A and B M3, M4 = Gauge port servo pressure M5 = Gauge port servo supply pressure internal M7, M8 = Gauge port control pressure internal X1 = Port for control supply pressure external XA, XB = Control pressure ports, BPD T1, T2, T3,T4, T5, T6,T7, T8, U6, U7 = Optional orifices N = Speed sensor

Displacement can be changed under load in response to an electrical signal between maximum displacement and minimum displacement and vice versa.

Control start = maximum displacement Control end = minimum displacement

Control supply pressure (port X1)

p

= 20 bar [290 psi]

min

p

max allowable

= 70 bar [1015 psi]

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 53

Control start

setting range

Ramp

min

max

50

158550

Current mA

Displacement

J

K

Proportional

control

PCOR start

setting range

Ramp < 10 bar

[145 psi]

370 [5370]

130

[1890]

High pressure Dp bar [psi]

Pressure compensator

override

Control start

version

P001 172E

A

B

D C

MS Connector

MS3102C-14S-2P

(Supplied Connector)

Mating Connector

No.: K08106

Id.-No.: 615062

P001 753E

Packard Weather-Pack

4 pin

(Supplied Connector)

Mating Connector

No.: K03384

Id.-No.: 712208

A B C D

P001 759E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Control operation EP**, EQ**

Control setting options

Type

JY JW 95 mA KY KW 95 mA

*

Max. current = 250 mA

**

from max. to min. displacement; full stroke current.

Start current (adjustable)*Standard setting: control

15 to 50 mA 30 = 30 mA

50 to 85 mA 70 = 70 mA

start

Ramp

70 mA

**

Coil wiring

Single Coil resistance = 26 Ω

Connectors

Wiring (maximum to minimum displacement)

Coil wiring Positive voltage on pin Ground on pin

Single coil B A Single coil (alt.) D C

Pressure Compensator Override (PCOR)

The control can be overridden by PCOR using high loop pressure.

54 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

When the PCOR activates, the motor displacement increases to maximum. Pressure ramp from PCOR start pressure (with motor at minimum displacement) until maximum

displacement is reached is less than 10 bar [145 psi] . This ensures optimal power utilization throughout the entire displacement range of the motor.

PCOR start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi].

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Configuration option PCOR at port BPD function

EPA1/EQA1 A and B with EPA2/EQA2 A and B without

Options EPA1, EQA1: pressure compensator configuration with Brake Pressure Defeat

A shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down.

Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls.

The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, see the following table:

Pressure compensator operation

Motor rotation High pressure port Control pressure on port*PCOR function

CW A XA no CW A XB yes CCW B XA yes CCW B XB no

*

Differencial control pressure between port XA/XB:

∆p

= 0.5 bar [7 psi]

min

∆p

= 50 bar [725 psi]

max

Options EPA2, EQA2: pressure compensator configuration without Brake Pressure Defeat

The pressure compensator override functions when the motor is running in motor mode as well as in pump (deceleration) mode.

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 55

n

T1

T2

T3

T7 T8

max.

disp.

P001 787E

B

A

L2 M4

M3

N

M1

M5

L1

M2

1290

440

0

645

220

0 20% min

100% max

Control current (mA)

Displacement

Electrohydraulic proportional control

L7**

L8**

P001 777E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options L1B1, L2B1, L7B1 – electrohydraulic proportional control for 51 (all frame sizes)

Circuit diagram – motor with electrohydraulic propor. control L1B1, L2B1, L7B1

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for A and B M3, M4 = Gauge port servo pressure M5 = Gauge port servo supply pressure internal T1, T2, T3,T7, T8 = Optional orifices N = Speed sensor

Displacement can be changed electrohydraulically under load in response to an electrical signal from minimum displacement to maximum displacement and vice versa. The displacement changes proportional to the electrical signal. The electrical signal must be a pulse-width modulated (PWM) signal, (f = 100...200 Hz).

Control start = maximum displacement Control end = minimum displacement

Control operation L1**, L2**, L7**

56 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

A B

P001752

2 1

P001751

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

L1B1, L2B1, L7B1 solenoid connectors

Solenoid plug face DIN 46350 (Supplied) AMP Junior Timer two-pin (Supplied)

Mating connector No.: K09129

Id. No.: 514117

Mating connector No.: K19815

Id. No.: 508388

Solenoid data

Configuration Voltage Nominal

L1B1 L7B1 AMP Junior Timer L2B1 24 V

12 V

resistance 20 °C

5.7 Ω 440 mA 1290 mA 1500 mA

DC

21.3 Ω 220 mA 645 mA 750 mA DIN 46350

DC

Start End Max.

Control current Connector

DIN 46350

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 57

n

T4

T6

T2

T3

T1

T7 T8

U7

max. disp.

B

XB

XA

M7

A

L2

M4 M3

N

M1

L1

M2

(M5)

X3

P001 869E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options D7M1, D8M1 – electrohydraulic proportional control with PCOR and hydraulic BPD for 51 (all frame sizes)

Circuit diagram – motor with EH prop. control D7M1, D8M1

Ports:

A, B = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for A and B M3, M4 = Gauge port servo pressure X3 (M5) = Servo pressure supply M7 = Gauge port control pressure XA, XB = Control pressure ports, hydraulic BPD T1, T2, T3,T4, T6,T7, T8, U7 = Optional orifices N = Speed sensor

Displacement can be changed electrohydraulically under load in response to an electrical signal from minimum displacement to maximum displacement and vice versa. The displacement changes proportional to the electrical signal. The electrical signal must be a pulse-width modulated (PWM) signal, (f = 100...200 Hz).

Solenoid not energized = maximum displacement Solenoid energized = minimum displacement Servo pressure supply = external pressure at port X3 Min. pressure = 25 bar [360 psi]

Max. pressure = 50 bar [725 psi]

Pressure Compensator Override (PCOR)

The control can be overridden by PCOR using high loop pressure. When the PCOR activates, the motor displacement increases to maximum. Pressure ramp from PCOR start

pressure (with motor at minimum displacement) until maximum displacement is reached is less than 10 bar [145 psi]. This ensures optimal power utilization throughout the entire displacement range of the motor.

PCOR start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi].

58 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Ramp

(ratio 5:1)

min

max

start-current

end-current

320 640

594

D8M1 D7M1

1188

Displacement

Electrohydr.

prop. control

PCOR start

setting range

Pressure compensator override

370 bar [5370 psi]

130 bar [1890 psi]

Ramp < 10 bar

[145 psi]

Control current (mA)

P001 873E

A B

P001752

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Control operation D7M1, D8M1

Options D7M1, D8M1: pressure compensator configuration with hydraulic Brake Pressure Defeat

A shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down.

Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls.

The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, see the following table:

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 59

Motor rotation High pressure port Control pressure on port*PCOR function

CW A XA no CW A XB yes CCW B XA yes CCW B XB no

*

Differencial control pressure between port XA/XB:

∆p

= 0.5 bar [7 psi]

min

∆p

= 50 bar [725 psi]

max

D7M1, D8M1 solenoid connector

Solenoid connector

Plug face DIN 46350 (Supplied) Mating connector No.: K09129 Id. No.: 514117

Configuration Voltage Nominal

D7M1 12 V D8M1 24 V

resistance 20 °C

5.7 Ω 640 mA 1188 mA 1500 mA

DC

21.2 Ω 320 mA 594 mA 750 mA

DC

Start End Max.

Control current Connector

AMP Junior Timer two-pin

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

T4

T6

U6

U7

T5

XA

XB

with Brake pressure defeat

without Brake pressure defeat

U6

U7

T5

n

T3

T7T1 T8

T2

max.

disp.

A

L2 M4

M3

N

M1

L1

M2

P001 788E

M5

B

M7

X1

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Options HS** – hydraulic proportional control for 51 (all frame sizes)

Circuit diagram – motor with hydraulic proportional control HS**

A, B = Main pressure lines M7 = Gauge port control pressure L1, L2 = Drain lines X1 = Port for control supply pressure external M1, M2 = Gauge port for A and B XA, XB = Control pressure ports, BPD M3, M4 = Gauge port servo pressure T1, T2, T3,T4, T5, T6,T7, T8, U6, U7 = Optional orifices M5 = Gauge port servo supply pressure N = Speed sensor

Displacement can be changed in response to a hydraulic signal under load between maximum displacement and minimum displacement and vice versa.

Control start = maximum displacement Control end = minimum displacement

Control pressure (Port X1)

External = absolute pressure

Control start setting range (pressure above case pressure)

p

start

P

max allowable

Control ramp

From 100% to 20% displacement 7 bar [102 psi] From 100% to 20% displacement 14 bar [203 psi]

3 to 5 bar [44 to 73 psi] 5 to 12 bar [73 to 175 psi] 12 to 30 bar [175 to 435 psi] control start pressure + 50 bar [725 psi]

60 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Pressure Compensator OverRide (PCOR)

The control can be overridden by PCOR using high loop pressure. When the PCOR activates, the motor displacement increases to maximum. Pressure ramp from PCOR start pressure (with motor at minimum displacement) until maximum displacement is reached is less than 10 bar [145 psi] . This ensures optimal

Control start

setting range

Ramp

min

Control pressure D bar [psi]

Displacement

A

Proportional

control

PCOR start

setting range

Ramp < 10 bar

[145 psi]

370 [5370]

130

[1890]

High pressure D p bar [psi]

Pressure compensator

override

Control start

version

5 [73]

12 [175]

30 [435]

3 [44]

5 [73]

12 [175]

B C

max

P001 171E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

power utilization throughout the entire displacement range of the motor. PCOR start pressure is adjustable from 130 to 370 bar [1890 to 5370 psi].

Control Operation HS**

Configuration PCOR at port BPD function

HSA1 A and B with HSA2 A and B without

Option HSA1: pressure compensator configuration with Brake Pressure Defeat

A shuttle valve ahead of the pressure compensator prevents operation in the deceleration direction (when motor is running in pump mode). This is designed to prevent rapid or uncontrolled deceleration while the vehicle/machine is slowing down. Pressure compensator override with brake pressure defeat is mainly used in systems with pumps having electric or hydraulic proportional controls or automotive controls.

The shuttle valve must be controlled by a 2-line external signal, based on direction of motor rotation, see the following table:

Motor rotation High pressure port Control pressure on port*PCOR function

CW A XA no CW A XB yes CCW B XA yes CCW B XB no

*

Differencial control pressure between port XA/XB:

∆p

= 0.5 bar [7 psi]

min

∆p

= 50 bar [725 psi]

max

Option HSA2: pressure compensator configuration without Brake Pressure Defeat

The pressure compensator override functions when the motor is running in motor mode as well as in pump (deceleration) mode.

Not all control options are shown in this Technical Information.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 61

Contact your Danfoss representative for special control functions.

T2

T3

T7 T8

T1

max. disp.

M2

X1

M7

B

M5

L1

M1

M4L2

A

M3

N

P001 880E

n

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Option HZB1 – hydraulic proportional control for 51 (all frame sizes)

Circuit diagram – motor with hydraulic propor. control HZB1

A, B = Main pressure lines L1, L2 = Drain lines M1, M2 = Gauge port for A and B M3, M4 = Gauge port servo pressure M5 = Gauge port servo supply pressure internal M7 = Gauge port control pressure X1 = Control pressure port T1, T2, T3, T7, T8 = Optional orifices N = Speed sensor

Displacement can be changed in response to a hydraulic signal under load between maximum displacement and minimum displacement and vice versa.

Control start = maximum displacement Control end = minimum displacement

Control pressure on port X1

External = absolute pressure

62 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Control start

Setting range

Ramp

min

max

Control pressure D bar [psi]

Displacement

A

Proportional

control

Control start

version

5 [73]

12 [175]

30 [435]

3 [44]

5 [73]

12 [175]

B C

P001 881E

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Controls circuit diagram – nomenclature – description

Control Operation HZB1

Control start setting range (pressure above case pressure)

p

start

P

max allowable

3 to 5 bar [44 to 73 psi] 5 to 12 bar [73 to 175 psi] 12 to 30 bar [175 to 435 psi] control start pressure + 50 bar [725 psi]

Control ramp

From 100% to 20% displacement 7 bar [102 psi] From 100% to 20% displacement 14 bar [203 psi]

Not all control options are shown in this Technical Information. Contact your Danfoss representative for special control functions.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 63

P001 790E

88.5

[3.48]

88.5

[3.48]

40.0

[1.57].

19°

Loop flushing shuttle valve

Charge pressure relief valve

min. angle stop adjustment

215.0 [8.45]

260.1 max.

[10.24 max.]

74.5

[2.93]

74.5

[2.93]

208.5

[8.21]

98.3

[3.87]

Split flange boss “A”+”B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

A

B

M4

70.0 [2.76]

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

50.8

[2.00]

23.8 [0.94]

Gauge port “M1” System pressure “A”

0.875-14UNF-2B [7/8 -14UNF-2B]

Gauge port “M2” System pressure “B”

0.875-14UNF-2B [7/8 -14UNF-2B]

49.0

[1.94]

103.0

[4.05]

242.0 [9.53]

121.0 [4.77]

A

B

M4

47.0 [1.85]

50.8

[2.00]

73.0

[2.87]

73.0 [2.87]

47.0 [1.85]

23.8 [0.94]

Gauge ports “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Split flange boss “A” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Split flange boss “B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Y

X

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 060

SAE flange design per ISO 3019/1

51V060-1 Two Position Control, N1NN (Side port on top, Axial port below)

64 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

A

M3

M1

M5

L1

L2

L1

L2

263.0

[10.35]

121.0

[4.77]

P001 965E

56.0

[2.22]

103.0

[4.05]

Y

X

88.5

[3.48]

88.5

[3.48]

294.0

[11.56]

74.5

[2.93]

74.5

[2.93]

172

[6.77]

96

[3.77]

41

[1.60]

217

[8.53]

19°

50.80

[2.00]

Y

23.90 [0.94]

X

U

98 max.

[3.87] max.

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

45.0 [1.77]

70.0 [2.76]

50.80

[2.00]

B

A

M5

M3

M4

23.80 [0.94]

Y

Split flange boss “A” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Split flange boss “B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

66

[2.60]

66

[2.60]

Y

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control mounting surface

Split flange boss “A”+”B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

min. angle stop adjustment

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control start adjustment

Loop flushing

shuttle valve Charge pressure relief valve

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 060

51V060 Proportional and Two Position Control, HZB1 (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 65

Ø126.975 ± 0.025

[4.999 ± 0.001]

Ø80.0

[3.15]

Ø44.45

[1.75]

ØG

ØD

ØA

Ø103.4

[4.07]

H

F

Mounting flange surface flange 127-4 (SAE "C")

per ISO 3019/1

E

B

C

Coupling may not protrude beyond this surface

12.45 [0.49]

18.0

[0.71]

P001 809E

57.25 ± 0.2

[2.25 ± 0.01]

57.25 ± 0.2

[2.25 ± 0.01]

57.25 ± 0.2

[2.25 ± 0.01]

4x Ø14.3 ± 0.2 [0.56 ± 0.01]

57.25 ± 0.2

[2.25 ± 0.01]

146.0 ± 1.6

[5.75 ± 0.06]

146.0 ± 1.6

[5.75 ± 0.06]

Speed pick-up

Ø19.5 [0.77] other side max

screw head space

R3.0

[0.12]

Control pressure port “X1(M3)” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

O-ring 3.00x116.00 FPM [0.12x4.57]

X

Z

Series 51 with

HZB1-control

Z

Series 51-1 with

N1NN-control

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 060

Shaft options – 51V060-1 and 51V060

Shaft spline data - mm [in]

Shaft option S1 C6

Number of teeth 14 21 Pitch 12/24 16/32 Pitch Ø 29.633 [1.167] 33.337 [1.312] Ø A 31.15 [1.23] 34.43 [1.36] Ø D 25.8 [1.02] 30.0 [1.18] Pressure angle 30° B 37.5 [1.476] C 47.5±0.5 [1.87] E 50.3±1.2 [1.98] F 55.5±0.7 [2.19] H 28.0 [1.1] Spline ANSI B92.1-1970, class 5, flat root side fit Ø G 0.4375-14UNC-2B [7/16-14UNC-2B]; allowed torque in thread max. 91 N•m

[805 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

66 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

P001 791E

49.0

[1.94]

94.0

[3.70]

218.0 [8.57]

87.0

[3.41]

90.0

[3.54]

59.0

[2.32]

40.0

[1.57]

19°

190.0 [7.49]

234.1 max. [9.22 max.]

77.5

[3.05]

75.5

[2.97]

208.5

[8.21]

98.9

[3.89]

23.8 [0.94]

A

B

M4

47.0 [1.85]

50.8

[2.00]

73.0

[2.87]

73.0 [2.87]

47.0 [1.85]

23.8 [0.94]

Split flange boss “A” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Split flange boss “B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

A

B

M4

70.0 [2.76]

Gauge port “M1” System pressure “A”

0.875-14UNF-2B [7/8 -14UNF-2B]

Gauge port “M2” System pressure “B”

0.875-14UNF-2B [7/8 -14UNF-2B]

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Loop flushing shuttle valve

Charge pressure relief valve

min. angle stop adjustment

Split flange boss “A”+”B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Y

X

Y

X

Gauge ports “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

50.8

[2.00]

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 060

DIN flange design per ISO 3019/2

51D060-1 two position control, N1NN (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 67

A

M3

M1

M5

L1

L2

45.0 [1.77]

50.80

[2.00]

70.0 [2.76]

Y

Split flange boss “A” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Split flange boss “B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

238.0 [9.39]

56.0

[2.22]

94.0

[3.70]

87.0

[3.45]

Y

X

90.0

[3.54]

59.0

[2.32]

Control start adjustment

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control mounting surface

P001 966E

Loop flushing shuttle valve

270.0

[10.64]

77.5

[3.05]

75.5

[2.97]

172.0

[6.77]

96.0

[3.77]

41.0

[1.60]

192.0 [7.56]

19°

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

50.80

[2.00]

Y

23.90 [0.94]

X

U

Split flange boss “A”+”B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

99.0

[3.89]

min. angle stop adjustment

Charge pressure relief valve

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

66.0 [2.60]

Y

L1

L2

A

B

M3

M5

M4

23.80 [0.94]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 060

51D060 proportional and two position control, HZB1 (Side port on top, Axial port below)

68 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Ø125.0 -

0.063

[4.921

- 0.002

]

Ø44.45

[1.75]

ØG

ØA

Ø85.0

[3.35]

ØD

H

F

E

B

C

17.0

[0.67]

32.5

[1.28]

9.0

[0.35]

6.0

[0.24]

P001 810E

56.57

[2.23]

56.57 [2.23]

56.57

[2.23]

56.57

[2.23]

150.0 ± 1.6

[5.91 ± 0.06]

150.0 ± 1.6

[5.91 ± 0.06]

Ø110.0

[4.33]

R1.6

[0.06]

Mounting flange surface flange 125 B4 HL

per ISO 3019/2

Coupling may not protrude beyond this surface

Ø14.0 ± 0.2 [0.55 ± 0.01]

Speed pick-up

Ø19.5 [0.77] other side max.

screw head space

Control pressure port “X1(M3)” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

X

Z

Series 51with

HZB1-control

Z

Series 51-1with

N1NN-control

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 060

Shaft options – 51D060-1 and 51D060

Shaft spline data - mm [in]

Shaft option D1 D2

Number of teeth 14 16 Spline W30x2x30x14x9g, side fit DIN 5480 W35x2x30x16x9g side fit DIN 5480 Pitch Ø 28.0 [1.102] 32.0 [1.260] Ø A 29.6 [1.17] 34.6 [1.36] B 27.0 [1.06] 32.0 [1.260] C 35.0±0.5 [1.38] 40.0±0.5 [1.58] Ø D 25.0 [0.98] 30.0 [1.18] E 37.5±1.1 [1.48] 42.5±1.1 [1.67] F 67.5±0.6 [2.66] 72.5±0.6 [2.85] H 25.0 [0.98] 25.0 [0.98] Ø G M10x1.5 allowed torque in thread max. 67 N•m [593 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 69

Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

70

[2.76]

70

[2.76]

A

B

M4

50.0

[1.97]

40.0

[1.57]

130.0 [5.13]

174.3 max.

[6.86 max.]

39.0

[1.54]

39.0

[1.54]

208.5

[8.21]

99.4

[3.91]

50.8

[2.00]

23.8 [0.94]

L1

P001 792E

47.0 [1.85]

50.8

[2.00]

73.0 [2.87]

47.0 [1.85]

A

B

M4

23.8 [0.94]

49.0

[1.94]

158.0 [6.21]

L1

19°

Split flange boss “A” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Split flange boss “B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Y

X

Gauge port “M1” System pressure “A”

0.875-14UNF-2B [7/8 -14UNF-2B]

Gauge port “M2” System pressure “B”

0.875-14UNF-2B [7/8 -14UNF-2B]

Loop flushing shuttle valve

Charge pressure relief valve

min. angle stop adjustment

Split flange boss “A”+”B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Y

X

Speed pick-up

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 060

Cartridge flange

51C060-1 two-position control, N1NN (Side port on top, Axial port below)

70 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

N

L2

A

L1

M3

M1

M5

45.0 [1.77]

50.80

[2.00]

70.0

[2.76 ]

70.0

[2.76 ]

23.80 [0.94]

Split flange boss “A” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Split flange boss “B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

179.0

[7.03]

P001 967E

56.0

[2.22]

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

66.0 [2.60]

50.0

[1.97]

Control Start Adjustment

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control mounting surface

209.0 [8.24]

39.0

[1.54]

39.0

[1.54]

172.0

[6.77]

96.0

[3.77]

41.0

[1.60]

132.0 [5.21]

19°

Case drain port “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

50.80

[2.00]

23.90 [0.94]

Split flange boss “A”+”B” DN 19 typ II 40 MPa series

per ISO 6162 [SAE 0.75] 4 thread: 0.375-16UNC-2B [3/8 -16UNC-2B] 19 [0.75] min. full thread depth

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

99.0

[3.89]

min. angle stop adjustment

Charge pressure relief valve

Alternate position Case drain port “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Loop Flushing shuttle valve

L2

N

L1

M3

B

A

M5

M4

Y

X

U

Y

X

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 060

51C060 proportional and two-position control, HZB1 (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 71

P001 811E

100.0 [3.94]

Clearance

min. Ø242.0

[9.53]

Ø18.0 ± 0.3

[0.71 ± 0.01]

236.9 max.

[9.33] max.

ØG

ØA

Ø90.0

[3.54]

Ø106.0

[4.17]

Ø134.0

[5.28]

79.5

[3.13]

74.5

[2.93]

H

56.0

[2.20]

B

E

F

C

12.6

[0.50]

91.8

[3.61]

20.0

[0.79]

20.0

[0.79]

ØD

Ø160.0

- 0.025

[6.299

- 0.001

]

R1.6

[0.06]

M3

Ø44.45

[1.75]

Z

X

Mounting flange surface cartridge flange

Alternate position Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B] Coupling may not protrude beyond this surface

Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

O-ring 3.00x150.00 FPM [0.12x5.90]

Ø30.0 [1.18] other side max

screen head space

Control pressure port “X1(M3)” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Series 51 with

HZB1-control

Z

Series 51-1 with

N1NN-control

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 060

Shaft options – 51C060-1 and 51C060

Shaft spline data - mm [in]

Shaft option D1 D2

Number of teeth 14 16 Spline W30x2x30x14x9g, side fit DIN 5480 W35x2x30x16x9g side fit DIN 5480 Pitch Ø 28.0 [1.102] 32.0 [1.26] Ø A 29.6 [1.17] 34.6 [1.36] B 27.0 [1.06] 32.0 [1.26] C 35.0±0.5 [1.38] 40.0±0.5 [1.58] Ø D 25.0 [0.98] 30.0 [1.18] E 36.8±1.4 [1.45] 41.8±1.4 [1.65] F 127.2±0.6 [5.0] 132.2±0.6 [5.21] H 25.0 [0.98] 25.0 [0.98] Ø G M10x1.5 allowed torque in thread max. 67 N•m [593 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

72 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

P001 793E

57.12

[2.25]

50.0 [1.97]

79.0 [3.11]

50.0 [1.97]

A

B

M4

27.76 [1.09]

53.0

[2.10]

116.0

[4.58]

261.0

[10.28]

134.0

[5.26]

93.7

[3.69]

94.0

[3.69]

45.0

[1.76]

19°

235.0 [9.27]

278.2 max.

[10.95 max.]

85.5

[3.37]

80.0

[3.15]

218.9

[8.62]

106.7

[4.20]

27.76 [1.09]

57.12

[2.25]

76.0 [2.99]

M4

A

B

Y

X

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Loop flushing shuttle valve

Charge pressure relief valve

min. angle stop adjustment

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Gauge port “M1” System pressure “A”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

Gauge port “M2” System pressure “B”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

Y

X

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Gauge ports “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 080

SAE flange design per ISO 3019/1

51V080-1 Two Position Control, N1NN (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 73

P001 794E

51.0 [2.01]

57.15

[2.25]

81.0 [2.01]

M3

M5

B

A

M4

27.76 [1.09]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

282.0

[11.09]

61.0

[2.39]

116.0

[4.58]

134.0 [5.26]

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

74.0 [2.91]

93.7

[3.69]

94.0

[3.69]

Control start adjustment

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control Mounting Surface

Loop flushing shuttle valve

318.0

[12.52]

85.5

[3.37]

80.0

[3.15]

183.0

[7.19]

102.0

[4.00]

M1

M5

M3

A

45.0

[1.76]

235.0 [9.27]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

19°

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

107.0

[4.20]

min. angle stop adjustment

Charge pressure relief valve

Y

X

U

Y

X

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

27.76 [1.09]

57.15

[2.25]

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 080

51V080 Proportional and Two-Position Control, HZB1 (Side port on top, Axial port below)

74 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

Ø126.975 ± 0.025

[4.999 ± 0.001]

Ø80.0

[3.15]

Ø44.0

[1.75]

ØG

ØA

ØD

H

F

E

B

57.25

[2.25]

57.25

[2.25]

57.25 [2.25]

150.0 ± 1.6

[5.91 ± 0.06]

150.0 ± 1.6

[5.91 ± 0.06]

57.25 [2.25]

P001 812E

C

12.0

[0.49]

20.0

[0.79]

R3.0

[0.12]

Coupling may not protrude beyond this surface

Mounting flange surface flange 127-4 (SAE "C")

per ISO 3019/1

O-ring 3.00x116.00 FPM [0.12x4.57]

Ø19.5 [0.77] other side max.

screw head space

4x Ø14.5 ± 0.2

[0.57 ± 0.01]

Speed pick-up

Control pressure port “X1(M3)” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

X

Z

Series 51 with

HZB1-control

Z

Series 51-1 with

N1NN-control

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 080

Shaft Options – 51V080-1 and 51V080

Shaft spline data - mm [in]

Shaft option S1 C7

Number of teeth 14 23 Pitch 12/24 16/32 Pitch Ø 29.633 [1.167] 36.513 [1.438] Ø A 31.15 [1.23] 37.61 [1.481] Ø D 25.8 [1.02] 32.0 [1.26] Pressure angle 30° B 37.5 [1.476] C 47.5±0.5 [1.87] E 49.5±1.1 [1.95] F 55.5±0.7 [2.19] H 28.0 [1.1] Spline ANSI B92.1-1970, class 5, flat root side fit Ø G 0.4375-14UNC-2B [7/16-14UNC-2B]; allowed torque in thread max. 91 N•m

[805 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 75

P001 795E

57.12

[2.25]

50.0 [1.97]

79.0

[3.11]

79.0 [3.11]

50.0 [1.97]

A

B

M4

27.76 [1.09]

53.0

[2.10]

112.0

[4.40]

237.0 [9.33]

96.0

[3.80]

76.0 [2.99]

A

B

M4

109.8 [4.32]

70.0

[2.75]

45.0

[1.76]

19°

211.0 [8.33]

252.7 max. [9.95 max.]

87.5

[3.44]

76.5

[3.01]

218.9

[8.62]

106.7

[4.20]

27.76 [1.09]

57.12

[2.25]

Loop flushing shuttle valve

Charge pressure relief valve

min. angle stop adjustment

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Y

X

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Gauge port “M1” System pressure “A”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

Gauge port “M2” System pressure “B”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

Y

X

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Gauge ports “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 080

DIN flange design per ISO 3019/2

51D080-1 two position control, N1NN (Side port on top, Axial port below)

76 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

P001 796E

109.8 [4.32]

66.65

[2.62]

Control start adjustment

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control mounting surface

Loop flushing shuttle valve

294.0

[11.58]

87.5

[3.44]

76.5

[3.01]

183.0

[7.19]

102.0

[4.00]

M1

M5

M3

A

45.0

[1.76]

211.0

[8.33]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

19°

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

min. angle stop adjustment

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

107.0

[4.20]

27.76 [1.09]

57.15

[2.25]

Charge pressure relief valve

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

74.0 [2.91]

51

[2.01]

57.15

[2.25]

81.0 [3.19]

51

[2.01]

M3

B

A

M4

M5

27.76 [1.09]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

258.0

[10.15]

61.0

[2.39]

112.0

[4.40]

96.0

[3.80]

Y

X

U

Y

X

W

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 080

51D080 Proportional and two position control, HZB1 (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 77

P001 813E

∅45.0

[1.75]

ØG

ØA

ØD

H

F

E

B

C

Ø140.0

- 0.063

[5.512

- 0.002

]

19.0

[0.75]

32.1

[1.26]

10.0

[0.39]

R1.6

[0.06]

Ø110.0

[4.33]

63.6 [2.5]

168.0 ± 1.6

[6.61 ± 0.06]

63.6

[2.5]

63.6

[2.5]

168.0 ± 1.6

[6.61 ± 0.06]

Mounting flange surface flange 140 B4 HL

per ISO 3019/2

Coupling may not protrude beyond this surface

4x Ø14.0 ± 0.2 [0.55 ± 0.01]

Speed pick-up

Ø19.5 [0.77] other side max.

screw head space

Control pressure port “X1(M3)” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

X

Z

Series 51-1 with

N1NN-control

Z

Series 51 with

HZB1-control

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 080

Shaft Options – 51D080-1 and 51D080

Shaft spline data - mm [in]

Shaft option D2 D3

Number of teeth 16 18 Spline W35x2x30x16x9g side fit DIN 5480 W40x2x30x18x9g side fit DIN 5480 Pitch Ø 32.0 [1.260] 36.0 [1.417] Ø A 34.6 [1.36] 39.6 [1.56] B 32.0 [1.26] 37.0 [1.46] C 40.0±0.5 [1.58] 45.0±0.5 [1.77] Ø D 30.0 [1.18] 35.0 [1.38] E 42.5±1.1 [1.67] 47.3±1.1 [1.86] F 72.5±0.6 [2.85] 85.3±0.6 [3.36] H 25.0 [0.98] 25.0 [0.98] Ø G M10x1.5 allowed torque in thread max. 67 N•m [593 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

78 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

P001 797E

76.0 [2.99]

A

B

M4

L1

48.0

[1.89]

45.0

[1.77]

133.0 [5.24]

174.4 max. [6.87 max.]

45.0

[1.77]

45.0

[1.77]

218.9

[8.62]

106.7

[4.20]

27.76 [1.09]

57.12

[2.25]

57.12

[2.25]

50.0 [1.97]

79.0

[3.11]

79.0 [3.11]

50.0 [1.97]

A

B

M4

27.76 [1.09]

53.0

[2.10]

159.0 [6.25]

L1

19°

Y

X

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Y

X

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Loop flushing shuttle valve

Charge pressure relief valve

min. angle stop adjustment

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Gauge port “M1” System pressure “A”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

Gauge port “M2” System pressure “B”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

Speed pick-up

Gauge ports “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 080

Cartridge flange

51C080-1 two-position control, N1NN (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 79

P001 798E

57.15

[2.25]

51.0 [2.01]

81.0 [3.19]

M4

M5

B

A

M3

27.76 [1.09]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

179.0 [7.07]

61.0

[2.39]

L1

19°

48.0

[1.98]

Control start adjustment

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control mounting surface

Speed pick-up

215.0 [8.45]

183.0

[7.19]

102.0

[4.00]

M1

M5

M3

A

45.0

[1.77]

133.0 [5.24]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

107.0

[4.20]

Charge pressure relief valve

45.0

[1.77]

45.0

[1.77]

L1

57.15

[2.25]

27.76 [1.09]

Loop flushing shuttle valve

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

min. angle stop adjustment

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

74.0 [2.91]

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Y

X

Y

U

Y

X

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 080

51C080 proportional and two-position control, HZB1 (Side port on top, Axial port below)

80 | © Danfoss | October 2017 520L0440 | BC00000018en-US0401

P001 814E

112.0 [4.41]

Ø22.0 ± 0.3

[0.87 ± 0.01]

261.9 max.

[10.31 max.]

Ø30.0 [1.18] other side max.

screw head space

ØG

ØA

Ø90.0

[3.54]

Ø112.0

[4.41]

84.5

[3.33]

84.5

[3.35]

28.0

[1.10]

B

45°

E

70.7

[2.78]

F

C

Coupling may not protrude beyond this surface

11.2

[0.44]

81.5

[3.21]

110.8 max

[4.36 max]

20.0

[0.79]

Ø190.0

- 0.029

[7.48

- 0.001

]

R1.6

[0.06]

M3

ØD

Ø44.45

[1.75]

Ø108.0

[4.25]

19.2

[0.76]

Clearance

min. Ø267.5

[10.53]

O-ring 3.00x179.00 FPM [0.12x7.04]

Mounting flange surface cartridge flange

Ø143.0

[5.71]

Z

X

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Control pressure port “X1(M3)” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Series 51-1 with

N1NN-control

Z

Series 51with

HZB1-control

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 080

Shaft options – 51C080-1 and 51C080

Shaft spline data - mm [in]

Shaft option D2 D3

Number of teeth 16 18 Spline W35x2x30x16x9g side fit DIN 5480 W40x2x30x18x9g side fit DIN 5480 Pitch Ø 32.0 [1.260] 36.0 [1.417] Ø A 34.6 [1.36] 39.6 [1.56] B 32.0 [1.26] 37.0 [1.46] C 40.0±0.5 [1.58] 45.0±0.5 [1.77] Ø D 30.0 [1.18] 35.0 [1.38] E 41.55±1.4 [1.64] 46.55±1.4 [1.83] F 150.4±0.6 [5.92] 155.4±0.6 [6.12] H 25.0 [0.98] 25.0 [0.98] Ø G M10x1.5 allowed torque in thread max. 67 N•m [593 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 81

P001 799E

57.12

[2.25]

50.0 [1.97]

80.0 [3.15]

50.0 [1.97]

A

B

M4

27.76 [1.09]

58.0

[2.27]

121.0

[4.74]

281.0

[11.05]

134.0 [5.27]

77.0 [3.03]

A

B

M4

101.0

[3.98]

101.0 [3.98]

48.0

[1.91]

19°

254.0

[10.01]

301.2 max.

[11.82 max.]

143.0 [5.63]

87.0

[3.43]

90.0

[3.54]

232.6

[9.16]

115.0

[4.53]

27.76 [1.09]

57.12

[2.25]

Gauge ports “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Y

X

W

Y

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Loop flushing shuttle valve

Charge pressure relief valve

min. angle stop adjustment

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Gauge port “M1” System pressure “A”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

Gauge port “M2” System pressure “B”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

Y

X

Y

W

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 110

SAE flange design per ISO 3019/1

51V110-1 Two Position Control, N1NN (Side port on top, Axial port below)

P001 800E

50.0 [1.97]

57.15

[2.25]

80.0 [3.15]

50.0 [1.97]

M3

M5

M4

A

B

27.76 [1.09]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

77.0 [3.03]

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

300.0 [11.8]

64.0

[2.53]

121.0

[4.74]

134.0 [5.27]

101.0 [3.98]

Control start adjustment

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control mounting surface

Loop flushing shuttle valve

Charge pressure relief valve

337.0

[13.25]

143.0 [5.63]

90.0

[3.54]

87.0

[3.43]

185.0

[7.30]

103.0

[4.00]

49.0

[1.91]

254.0

[10.01]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

19°

Case drain “L”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

115 max.

[4.53] max.

A

M1

M5

M3

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

min. angle stop adjustment

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Y

X

U

Y

X

57.15

[2.25]

27.76 [1.09]

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 110

51V110 Proportional and Two-Position Control, HZB1 (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 83

80.8 ± 0.2 [3.18 ± 0.01]

Ø20.5 ± 0.2 [0.81 ± 0.01]

80.8 ± 0.2 [3.18 ± 0.01]

80.8 ± 0.2

[3.18 ± 0.01]

80.8 ± 0.2

[3.18 ± 0.01]

Ø30.0 [1.18] other side max.

screw head space

200.0 ± 1.8

[7.87 ± 0.07]

200.0 ± 1.8

[7.87 ± 0.07]

P001 815E

Ø152.375 ± 0.025

[5.999 ± 0.001]

Ø100.0

[3.94]

Ø55.0

[2.17]

ØG

ØA

ØD

Ø128.1

[5.04]

H

F E

B

C

Coupling may not protrude beyond this surface

12.45 [0.49]

22.0

[0.87]

R3.0

[0.12]

Mounting flange surface flange 152-4 (SAE "D")

per ISO 3019/1

O-ring 3.00x142.00 FPM [0.12x5.59]

Speed pick-up

Control pressure port “X1(M3)” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

X

Z

Series 51 with

HZB1-control

Z

Series 51 with

HZB1-control

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 110

Shaft Options – 51V110-1 and 51V110

Shaft spline data - mm [in]

Shaft option F1 C8

Number of teeth 13 27 Pitch 8/16 16/32 Pitch Ø 41.275 [1.625] 42.862 [1.688] Ø A 43.64 [1.72] 43.96 [1.73] Ø D 36.0 [1.42] 39.60 [1.56] Pressure angle 30° B 55.0 [2.17] C 67.0±0.5 [2.64] E 69.8±1.1 [2.75] F 75.40±0.7 [2.97] H 28.0 [1.1] Spline ANSI B92.1-1970, class 5, flat root side fit Ø G 0.625-11UNC-2B [5/8-11UNC-2B]; allowed torque in thread max. 200 N•m

[1770 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

P001 801E

57.12

[2.25]

50.0 [1.97]

80.0

[3.15]

80.0 [3.15]

50.0 [1.97]

A

B

M4

27.76 [1.09]

58.0

[2.27]

127.0

[4.99]

249.0 [9.81]

115.0 [4.52]

77.0 [3.03]

A

B

M4

107.05 [4.21]

69.05 [2.72]

49.0

[1.92]

19°

223.0

[8.77]

268.2 max.

[10.56 max.]

93.5

[3.68]

88.5

[3.48]

232.8

[9.16]

115.0

[4.53]

27.76 [1.09]

57.12

[2.25]

W

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Y

X

Y

X

Y

Loop flushing shuttle valve

Charge pressure relief valve

min. angle stop adjustment

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Gauge port “M1” System pressure “A”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

Gauge port “M2” System pressure “B”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

Gauge ports “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 110

DIN flange design per ISO 3019/2

51D110-1 two position control, N1NN (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 85

P001 802E

50.0 [1.97]

57.15

[2.25]

80.0 [3.15]

50.0 [1.97]

M3

M5

M4

A

B

27.76 [1.09]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

268.0

[10.54]

64.0

[2.53]

125.0

[4.94]

111.0 [4.35]

Charge pressure relief valve

107.05 [4.21]

69.05 [2.72]

Control start adjustment

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control mounting surface

Loop flushing shuttle valve

305.0

[12.00]

88.5

[3.48]

93.5

[3.68]

185.0

[7.30]

103.0

[4.06]

49.0

[1.91]

222.0 [8.75]

19°

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

min. angle stop adjustment

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

114.0

[4.50]

A

M1

M5

M3

57.15

[2.25]

27.76 [1.09]

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

77.0 [3.03]

Y

X

U

Y

X

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 110

51D110 proportional and two position control, HZB1 (Side port on top, Axial port below)

P001 816E

ØG

ØA

ØD

Ø55.0

[2.17]

Ø116.0

[4.57]

H

F

E

B

C

Coupling may not protrude beyond this surface

Ø160.0

- 0.063

[6.299

- 0.002

]

22.0

[0.87]

40.3

[1.59]

9.0

[0.35]

R2.5

[0.10]

Ø18.0 ± 0.2 [0.71 ± 0.01]

Ø30.0 [1.18] other side max.

screw head space

70.7

[2.78]

70.7

[2.78]

190.0 ± 1.8

[7.48 ± 0.07]

70.7

[2.78]

70.7

[2.78]

190.0 ± 1.8

[7.48 ± 0.07]

Mounting flange surface flange 160 B4 HL

per ISO 3019/2

13.5

[0.53]

Speed pick-up

Control pressure port “X1(M3)” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

X

Z

Series 51 with

HZB1-control

Z

Series 51-1 with

N1NN-control

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 110

Shaft options – 51D110-1 and 51D110

Shaft spline data - mm [in]

Shaft option D3 D4

Number of teeth 18 21 Spline W40x2x30x18x9g side fit DIN 5480 W45x2x30x21x9g side fit DIN 5480 Pitch Ø 36.0 [1.417] 42.0 [1.654] Ø A 39.6 [1.56] 44.6 [1.76] B 37.0 [1.46] 42.0 [1.65] C 45.0±0.5 [1.77] 50.0±0.5 [1.97] Ø D 35.0 [1.38] 40.0 [1.57] E 47.3±1.1 [1.86] 52.3±1.1 [2.06] F 85.3±0.6 [3.36] 90.3±0.6 [3.56] H 30.0 [1.18] 30.0 [1.18] Ø G M12x1.75 allowed torque in thread max. 115 N•m [1018 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 87

P001 803E

58.0

[2.27]

166.0 [6.55]

L1

19°

57.12

[2.25]

50.0 [1.97]

80.0 [3.15]

50.0 [1.97]

A

B

M4

27.76 [1.09]

77.0 [3.03]

A

B

M4

48.0

[1.89]

49.0

[1.92]

140.0 [5.51]

185.3 max. [7.3 max.]

48.0

[1.89]

48.0

[1.89]

233.1

[9.18]

115.0

[4.53]

27.76 [1.09]

L1

57.12

[2.25]

Loop flushing shuttle valve

Charge pressure relief valve

min. angle stop adjustment

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Gauge port “M1” System pressure “A”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

Gauge port “M2” System pressure “B”

1.0625-12UNF-2B [1 1/

16

-12UNF-2B]

W

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Gauge port “M4” System pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

Y

X

Y

Gauge ports “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Speed pick-up

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 110

Cartridge flange

51C110-1 two-position control, N1NN (Side port on top, Axial port below)

L2

A

M3

M1

M5

N

L1

P001 804E

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

77.0 [3.03]

48.0

[1.89]

Control start adjustment

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control mounting surface

221.0

[8.71]

185.0 max.

[7.30] max.

103.0

[4.06]

49.0

[1.91]

140.0 [5.50]

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

115.0 max.

[4.53] max.

57.15

[2.25]

27.76 [1.09]

Charge pressure relief valve

Loop flushing shuttle valve

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

min. angle stop adjustment

Speed pick-up

M3

M4

M5

A

B

27.66 [1.09]

50.0 [1.97]

80.0 [3.15]

57.15

[2.25]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

185.0 [7.29]

64.0

[2.53]

19°

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Y

X

U

Y

X

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 110

51C110 proportional and two-position control, HZB1 (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 89

P001 817E

125.0 [4.92]

125.0

[4.92]

Ø22.0 ± 0.3 [0.87 ± 0.01]

287.9

[11.33]

Ø30.0 [1.18] other side max.

screw head space

ØG

ØA

Ø112.2

[4.42]

Ø160.0

[6.30]

H

B

45°

E

79.5

[3.13]

121.3 [4.78]

F

C

Coupling may not protrude beyond this surface

11.2

[0.44]

20.0

[0.79]

Ø200.0

- 0.029

[7.874

- 0.001

]

R2.0

[0.10]

M3

ØD

Ø55.0

[2.17]

92.5

[3.64]

Ø136.0

[5.35]

21.2

[0.83]

Clearance

min. Ø293.5

[11.56]

92.5

[3.64]

O-ring 3.00x192.00 FPM [0.12x7.56]

Mounting flange surface cartridge flange

Alternate position Case drain “L2”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Case drain “L1”

1.0625-12UN-2B [1 1/

16

-12UN-2B]

Control pressure port “X1(M3)” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

X

Z

Series 51 with

HZB1-control

Z

Series 51-1 with

N1NN-control

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 110

Shaft options – 51C110-1 and 51C110

Shaft spline data - mm [in]

Shaft option D3 D4

Number of teeth 18 21 Spline W40x2x30x18x9g side fit DIN 5480 W45x2x30x21x9g side fit DIN 5480 Pitch Ø 36.0 [1.417] 42.0 [1.654] Ø A 39.6 [1.56] 44.6 [1.76] B 37.0 [1.46] 42.0 [1.65] C 45.0±0.5 [1.77] 50.0±0.5 [1.97] Ø D 35.0 [1.38] 40.0 [1.57] E 47.4±1.1 [1.87] 52.4±1.4 [2.06] F 167.7±0.6 [6.6] 172.7±0.6 [6.8] H 30.0 [1.18] 30.0 [1.18] Ø G M12x1.75 allowed torque in thread max. 115 N•m [1018 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

M3

M5

M1

A

L1

L2

P001 805E

60.0 [2.36]

57.15

[2.25]

60.0 [2.36]

91.0 [3.58]

A

B

M5

M4

M3

27.76 [1.09]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

313.0

[12.34]

64.0

[2.52]

144.0

[5.68]

165.0 [6.51]

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

84.0 [3.31]

114.0 [4.47]

Control start adjustment

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control mounting surface

Loop flushing shuttle valve

376.0

[14.82]

97.0

[3.82]

97.0

[3.82]

205.0

[8.08]

111.0

[4.37]

53.0

[2.10]

282.0

[11.11]

Alternate position Case drain “L2”

1.3125-12UN-2B [1 5/16-12UN-2B]

19°

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

125.0

[4.94]

27.76 [1.09]

57.15

[2.25]

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

min. angle stop adjustment

L1

L2

Y

X

U

Y

X

Charge pressure relief valve

Case drain “L1”

1.3125-12UN-2B [1 5/16-12UN-2B]

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 160

SAE flange design per ISO 3019/1

51V160 proportional and two-position control, HZB1 (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 91

Ø152.375 ± 0.025

[5.999 ± 0.001]

Ø100.0

[3.94]

Ø55.0

[2.17]

ØG

ØA

ØD

H

F

E

B

C

Coupling may not protrude beyond this surface

12.45 [0.49]

22.0

[0.87]

R3.0

[0.12]

P001 818E

80.8

[3.18]

80.8

[3.18]

Ø20.5 ± 0.2 [0.81 ± 0.01]

80.8

[3.18]

80.8

[3.18]

200.0 ± 1.8

[7.87 ± 0.07]

200.0 ± 1.8

[7.87 ± 0.07]

Speed pick-up

Mounting flange surface flange 152-4 (SAE "D")

per ISO 3019/1

O-ring 3.00x142.00 FPM [0.12x5.59]

Ø30.0 [1.18] other side max.

screw head space

Z

X

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 160

Shaft options – 51V160

Shaft spline data - mm [in]

Shaft option F1 F2 C8

Number of teeth 13 15 27 Pitch 8/16 8/16 16/32 Pitch Ø 41.275 [1.625] 47.625 [1.875] 42.862 [1.688] Ø A 43.64 [1.72] 49.99 [1.97] 43.96 [1.73] B 55.0 [2.17] 53.0 [2.09] 55.0 [2.17] Ø D 36.0 [1.42] 42.20 [1.66] 39.60 [1.56] Pressure angle 30° C 67.0±0.5 [2.64] E 70.0±1.1 [2.76]

H 36.0 [1.42]

F 75.40±0.7 [2.97]

Spline ANSI B92.1-1970, class 5, flat root side fit Ø G 0.625-11UNC-2B [5/8-11UNC-2B]; allowed torque in thread max. 200 N•m [1770 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

P001 806E

281.0

[11.08]

64.0

[2.53]

138.0

[5.44]

122.0 [4.80]

60.0 [2.36]

57.15

[2.25]

91.0 [3.58]

60.0 [2.36]

M4

M5

M3

B

A

27.76 [1.09]

84.0 [3.31]

121.5 [4.78]

81.0

[3.21]

345.0

[13.60]

95.5

[3.76]

103.0

[4.06]

205.0

[8.08]

111.0

[4.37]

53.0

[2.10]

250.0 [9.85]

19°

125.0

[4.94]

A

M1

M5

M3

27.76 [1.09]

57.15

[2.25]

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Y

X

Control start adjustment

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control mounting surface

Loop flushing shuttle valve

Alternate position Case drain “L2”

1.3125-12UN-2B [1 5/

16

-12UN-2B]

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

min. angle stop adjustment

Y

X

Charge pressure relief valve

Case drain “L1”

1.3125-12UN-2B [1 5/

16

-12UN-2B]

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Y

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

U

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 160

DIN flange design per ISO 3019/2

51D160 proportional and two-position control, HZB1 (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 93

ØG

ØA

ØD

Ø55.0

[2.17]

Ø120.0

[4.72]

H

F

E

B

C

Coupling may not protrude beyond this surface

Ø180.0

- 0.063

[7.087

- 0.002

]

25.0

[0.99]

40.0

[1.59]

9.0

[0.35]

9.0

[0.35]

R1.6

[0.06]

P001 819E

Speed pick-up

Ø18.0 ± 0.2 [0.71 ± 0.01]

79.2

[3.12]

79.2

[3.12]

212.0 ± 1.8

[8.35 ± 0.07]

79.2

[3.12]

79.2

[3.12]

212.0 ± 1.8

[8.35 ± 0.07]

Ø130.0

(5.12)

Mounting flange surface flange 180 B4 HL

per ISO 3019/2

Ø30.0 [1.18] other side max.

screw head space

Z

X

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 160

Shaft options – 51D160

Shaft spline data - mm [in]

Shaft option D4 D5

Number of teeth 21 24 Spline W45x2x30x21x9g side fit DIN 5480 W50x2x30x24x9g side fit DIN 5480 Pitch Ø 42.0 [1.654] 48.0 [1.890] Ø A 44.6 [1.76] 49.6 [1.95] B 42.0 [1.65] 47.0 [1.85] C 50.0±0.5 [1.97] 55.0±0.5 [2.17] Ø D 40.0 [1.57] 45.0 [1.77] E 52.3±1.1 [2.06] 57.3±1.1 [2.26] F 90.3±0.6 [3.56] 95.3±0.6 [3.75] H 30.0 [1.18] 30.0 [1.18] Ø G M12x1.75 allowed torque in thread max. 115 N•m [1018 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

P001 807E

B

A

M4

M5

M3

60.0 [2.36]

91.0 [3.58]

60.0 [2.36]

57.15

[2.25]

27.76 [1.09]

L1

177.0 [6.96]

64.0

[2.52]

19°

84.0 [3.31]

L1

M5

M1

M3

A

146.0 [5.73]

54.0

[2.13]

239.0 [9.40]

205.0

[8.08]

125.0

[4.94]

53.0

[2.1]

111.0

[4.37]

57.15

[2.25]

27.76 [1.09]

51.0

[2.01]

51.0

[2.01]

Control start adjustment

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control mounting surface

Loop flushing shuttle valve

Alternate position Case drain “L2”

1.3125-12UN-2B [1 5/

16

-12UN-2B]

Gauge port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Split flange boss “A”+”B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

min. angle stop adjustment

Charge pressure relief valve

Case drain “L1”

1.3125-12UN-2B [1 5/

16

-12UN-2B]

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Y

X

Y

U

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Split flange boss “A” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Split flange boss “B” DN 25 typ II 40 MPa series

per ISO 6162 [SAE 1.00] 4 thread: 0.4375-14UNC-2B [7/

16

-14UNC-2B] 27 [1.06] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Y

X

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 160

Cartridge flange

51C160 proportional and two-position control, HZB1 (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 95

P001 820E

140.0 [5.51]

Ø22.0 ± 0.3

[0.87 ± 0.01]

318.0 ± 2.0

[12.52 ± 0.08]

11.2

[0.44]

140.8 max. [5.54 max.]

20.03

[0.79]

Alternate position Case drain “L2”

1.3125-12UN-2B [1 5/

16

-12UN-2B]

104.0

[4.09]

104.0

[4.09]

Ø230.0

- 0.029

[9.055

- 0.001

]

Ø184.0

[7.24]

Case drain “L1”

1.3125-12UN-2B [1 5/

16

-12UN-2B]

B

E

96.0

[3.78]

F

H

C

Coupling may not protrude beyond this surface

ØG

ØA

Ø120.0

[4.72]

Ø142.0

[5.59]

Ø55.0

[2.17]

ØD

45°

Clearance

min. Ø323.6

[12.74]

O-ring 3.00x220.00 FPM [0.12x8.66]

Mounting flange surface cartridge flange

Z

X

Z

Ø30.0 [1.18] other side max.

screw head space

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 160

Shaft options – 51C160

Shaft spline data - mm [in]

Shaft option D4 D5

Number of teeth 21 24 Spline W45x2x30x21x9g side fit DIN 5480 W50x2x30x24x9g side fit DIN 5480 Pitch Ø 42.0 [1.654] 48.0 [1.890] Ø A 44.6 [1.76] 49.6 [1.95] B 42.0 [1.65] 47.0 [1.85] C 50.0±0.5 [1.97] 55.0±0.5 [2.17] Ø D 40.0 [1.57] 45.0 [1.77] E 54.5±1.4 [2.15] 59.5±1.4 [2.34] F 194.9±0.6 [7.67] 199.9±0.6 [7.87] H 30.0 [1.18] 30.0 [1.18] Ø G M12x1.75 allowed torque in thread max. 115 N•m [1018 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

A

M5

M3

M1

L2

L1

P001 808E

359.0

[14.13]

74.0

[2.90]

155.0

[6.11]

182.0 [7.15]

97.0 [3.82]

131.5 [5.18]

429.0

[16.89]

239.0

[9.39]

120.0

[4.71]

62.0

[2.44]

325.0

[12.79]

19°

137.0

[5.4]

31.76 [1.25]

66.68

[2.63]

113.0

[4.45]

113.0

[4.45]

M5

M4

M3

A

B

66.68

[2.63]

31.76 [1.25]

65.0 [2.56]

99.0 [3.90]

L2

L1

Split flange boss “A” DN 32 typ II 40 MPa series

per ISO 6162 [SAE 1.25] 4 thread: 0.5-13UNC-2B [1/2 -13UNC-2B] 25 [0.98] min. full thread depth

Split flange boss “B” DN 32 typ II 40 MPa series

per ISO 6162 [SAE 1.25] 4 thread: 0.5-13UNC-2B [1/2 -13UNC-2B] 25 [0.98] min. full thread depth

Gauge port “M1”+”M2” System pressure “A”+”B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Y

X

Control mounting surface

Alternate position Case drain “L2”

1.3125-12UN-2B [1 5/16-12UN-2B]

Gage port “M7” Control pressure

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Split flange boss “A”+”B” DN 32 typ II 40 MPa series

per ISO 6162 [SAE 1.25] 4 thread: 0.5-13UNC-2B [1/2 -13UNC-2B] 25 [0.98] min. full thread depth

min. angle stop adjustment

Loop flushing shuttle valve

Charge pressure relief valve

Case drain “L1”

1.3125-12UN-2B [1 5/16-12UN-2B]

Gauge port “M3” Servo pressure min. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M5” Servo pressure supply

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control start adjustment

Gauge port “M1” System pressure “A”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M2” System pressure “B”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Gauge port “M4” Servo pressure max. angle

0.5625-18UNF-2B [9/

16

-18UNF-2B]

W

M4

Shaft centerline

Control pressure port “X1”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

U

X1

M7

49.0

[1.93]

Y

X

Y

U

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 250

SAE flange design per ISO 3019/1

51V250 Proportional and Two-Position Control, HZB1 (Side port on top, Axial port below)

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 97

Ø165.075 ± 0.025

[6.499 ± 0.001]

Ø100.0

[3.94]

Ø55.0

[2.17]

ØG

ØA

ØD

Ø118.0

[4.65]

36.0

[1.42]

F

E

B

C

Coupling may not protrude beyond this surface

15.65 [0.62]

25.0

[0.98]

R3.0

[0.12]

Speed pick-up

Ø20.5 ± 0.2 [0.81 ± 0.01]

P001 821E

112.25 [4.42]

260.0 ± 1.9

[10.24 ± 0.07]

112.25

[4.42]

112.25

[4.42]

260.0 ± 1.9 [10.24 ± 0.07]

O-ring 3.00x154.00 FPM [0.12x6.06]

Mounting flange surface flange 165-4 (SAE "E")

per ISO 3019/1

Ø30.0 [1.18] other side max.

screw head space

Z

X

Z

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

General dimensions – frame size 250

Shaft Options – 51V250

Shaft spline data - mm [in]

Shaft option F2 C8

Number of teeth 15 27 Pitch 8/16 16/32 Pitch Ø 47.625 [1.875] 42.862 [1.688] Ø A 49.99 [1.97] 43.96 [1.73] B 53.0 [2.09] 55.0 [2.17] Ø D 42.20 [1.66] 39.60 [1.56] Pressure angle 30° C 67.0 ±0.5 [2.64] E 70.0 ±1.1 [2.76] F 75.4 ±0.7 [2.97] H 36.0 [1.42] Spline ANSI B92.1-1970, class 5, flat root side fit Ø G 0.625-11UNC-2B [5/8-11UNC-2B]; allowed torque in thread max. 200 N•m [1770 lbf•in]

Flow into port A results in CW rotation of output shaft. Flow into port B results in CCW rotation of output shaft. Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in

accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

P001 838E

AC

75.0

[2.94]

55.0

[2.17]

128.2

[5.05]

AB

Flange

AA

55.0

[2.17]

Solenoid for Electric brake pressure defeat

X1

M3

XA

XB

X1

M3

XA

XB

Shaft centerline

Control pressure port “XA”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control pressure port “XB”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Z

Electric brake

pressure defeat

TAD*

Z

Hydraulic brake

pressure defeat

TACA

A B

P001752

2 1

P001751

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Dimension – Controls

Options TA** for 51-1 – Pressure Compensator Control (Frame Size: 060, 080, 110)

Control TA** for 51-1 - mm [in]

Frame 060 080 110 Design V D C V D C V D C

AA 181.2

[7.13]

AB 199.3 [7.85] 209.7 [8.26] 223.5 [8.80] 223.9

AC 176.4 [6.95] 186.8 [7.36] 200.6 [7.90] 201.0

V = SAE-flange D = DIN-flange C = Cartridge flange

156.7 [6.17]

96.9 [3.82]

196.9 [7.75]

172.9 [6.81]

94.5 [3.72]

213.4 [8.40]

181.8 [7.16]

99.0 [3.90]

[8.82]

[7.91]

Solenoid connectors

Plug face DIN 46350 (Supplied)

Mating connector No.: K09129 Id. No.: 514117

AMP Junior Timer two pin (Supplied) Mating connector No.: K19815 Id. No.: 508388

Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

©

Danfoss | October 2017 520L0440 | BC00000018en-US0401 | 99

Flange

JA

JB

58.0

[2.28]

Shaft centerline

Supply pressure Shuttle valve

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control pressure port “XA”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

Control pressure port “XB”

0.5625-18UNF-2B [9/

16

-18UNF-2B]

P001 839E

Z

Control option

TAC2

X1

XB

XA

X4

Technical Information

Series 51 and 51-1 Bent Axis Variable Displ. Motors

Dimension – Controls

Options TA** for 51 – Pressure Compensator Control (Frame Size: 160, 250)

Control TA** for 51 - mm [in]

Frame 160 250 Design V D C V D C

JA 393 [15.48] 361 [14.22] 257 [10.11] 445 [17.51] – JB 114 [4.48] 122 [4.82] –

V = SAE-flange D = DIN-flange C = Cartridge flange

Shaft rotation is determined by viewing from shaft end. Ports with O-ring seal and inch threads shall be in accordance with ISO 11926/1. Splite flange boss A and B per ISO 6162 is identical with high pressure series SAEJ518 code 62 (6000 psi). Contact your Danfoss representative for specific installation drawings.

Danfoss Series 51 and 51-1 Bent Axis Variable Displ. Motors User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Series 51 general information

Sectional view of Series 51, proportional control

Sectional view of Series 51-1, two-position control

Pictorial diagram

System circuit diagram

Series 51/51-1 name plates

Technical specifications

General specifications

Specific data

Fluid specifications

Determination of nominal motor size

General technical specifications

Case pressure

Speed range

Pressure limits

Loop flushing

Minimum displacement limiter

Hydraulic fluids

Temperature and viscosity

Filtration system

Fluid selection

Reservoir

Independent braking system

Motor bearing life

External shaft loads

External shaft load orientation

Radial and thrust loads to the output shaft

Allowable external shaft load, when shaft load distance is different from standard

Efficiency graphs and maps

Speed sensor

Typical control and regulator applications

Controls circuit diagram – nomenclature – description

Option N1NN – hydraulic two-position control for 51-1 (frame size: 060, 080, 110)

Option HZB1 – hydraulic two-position control for 51 (frame size: 160, 250)

Options TA** – pressure compensator control for 51-1 (frame size: 060, 080, 110)

Option TACA: pressure compensator configuration with hydraulic Brake Pressure Defeat

Options TAD1, TAD2, TAD7: pressure compensator configuration with electric BPD

TAD* solenoid connectors

Option TAC2: pressure compensator configuration without Brake Pressure Defeat

Options TA** – pressure compensator controls for 51 (frame size 160, 250)

Option TAC0: pressure compensator configuration with hydraulic Brake Pressure Defeat

Option TAC2: pressure compensator configuration without Brake Pressure Defeat

Options TH** – hydraulic two-position control for 51-1 (frame size: 060, 080, 110)

Pressure Compensator OverRide (PCOR)

Option THCA: pressure compensator configuration with hydraulic Brake Pressure Defeat

Options THD1, THD2, THD7: pressure compensator configuration with electric BPD

THD* solenoid connectors

Option THC2: pressure compensator configuration without Brake Pressure Defeat

Options TH** – hydraulic two-position control for 51 (frame size 160, 250)

Pressure Compensator OverRide (PCOR)

Option THC0: pressure compensator configuration with hydraulic BPD

Option THC2: pressure compensator configuration without Brake Pressure Defeat

Options E1B1, E2B1, E7B1 – electrohydraulic two-position control for 51-1 (frame size 060, 080, 110)

E1B1, E2B1, E7B1 solenoid connectors

Options E1A5, E2A5 – electrohydraulic two-position control for 51 (frame size 160, 250)

E1A5, E2A5 solenoid connectors

Options F1B1, F2B1 – electrohydraulic two-position control for 51-1 (frame size 060, 080, 110)

F1B1, F2B1 solenoid connectors

Options F1A5, F2A5 – electrohydraulic two-position control for 51 (frame size 160, 250)

F1A5, F2A5 solenoid connectors

Options T1**, T2**, T7** – electrohydraulic two-position control for 51-1 (frame size 060, 080, 110)

Option T*CA: pressure compensator configuration with hydraulic Brake Pressure Defeat

Options T*D1, T*D2, T* D7: pressure compensator configuration with electric BPD

T1D1, T2D2, T7D7 solenoid connectors

Option T*C2: pressure compensator configuration without Brake Pressure Defeat

Options T1**, T2** – electrohydraulic two-position control for 51 (frame size 160, 250)

Option T*C0: pressure compensator configuration with hydraulic Brake Pressure Defeat

Option T*C2: pressure compensator configuration without Brake Pressure Defeat

T1C2, T2C2 solenoid connectors

Options EP**, EQ** – electrohydraulic proportional control for 51 (all frame sizes)

Pressure Compensator Override (PCOR)

Options EPA1, EQA1: pressure compensator configuration with Brake Pressure Defeat

Options EPA2, EQA2: pressure compensator configuration without Brake Pressure Defeat

Options L1B1, L2B1, L7B1 – electrohydraulic proportional control for 51 (all frame sizes)

L1B1, L2B1, L7B1 solenoid connectors

Options T1, T2, T7** – electrohydraulic two-position control for 51-1 (frame size 060, 080, 110)

Options TD1, TD2, T* D7: pressure compensator configuration with electric BPD

Options T1, T2 – electrohydraulic two-position control for 51 (frame size 160, 250)

Options EP, EQ – electrohydraulic proportional control for 51 (all frame sizes)