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
Contents
Series 51 general information
	Sectional view of Series 51, proportional control.................................................................................................................	7
	Sectional view of Series 51-1, two-position control.............................................................................................................	8
	Pictorial diagram...............................................................................................................................................................................	9
	System circuit diagram...................................................................................................................................................................	9
	Series 51/51-1 name plates........................................................................................................................................................	10
Technical specifications
	General specifications..................................................................................................................................................................	11
	Specific data.....................................................................................................................................................................................	11
	Fluid specifications........................................................................................................................................................................	12
	Determination of nominal motor size....................................................................................................................................	13
General technical specifications
	Case pressure...................................................................................................................................................................................	14
	Speed range.....................................................................................................................................................................................	14
	Pressure limits.................................................................................................................................................................................	15
	Loop flushing...................................................................................................................................................................................	16
	Minimum displacement limiter................................................................................................................................................	17
	Hydraulic fluids...............................................................................................................................................................................	17
	Temperature and viscosity.........................................................................................................................................................	18
	Filtration system ............................................................................................................................................................................	18
	Fluid selection.................................................................................................................................................................................	19
	Reservoir............................................................................................................................................................................................	19
	Independent braking system....................................................................................................................................................	19
	Motor bearing life..........................................................................................................................................................................	20
	External shaft loads.......................................................................................................................................................................	21
	External shaft load orientation..................................................................................................................................................	21
	Radial and thrust loads to the output shaft....................................................................................................................	22
	Allowable external shaft load, when shaft load distance is different from standard.................................	22
	Efficiency graphs and maps.......................................................................................................................................................	23
	Speed sensor...................................................................................................................................................................................	25
	Typical control and regulator applications...........................................................................................................................	26
Controls circuit diagram – nomenclature – description
	Option N1NN – hydraulic two-position control for 51-1 (frame size: 060, 080, 110).............................................	27
	Option HZB1 – hydraulic two-position control for 51 (frame size: 160, 250)...........................................................	28
	Options TA** – pressure compensator control for 51-1 (frame size: 060, 080, 110)..............................................	30
	Option TACA: pressure compensator configuration with hydraulic Brake Pressure Defeat.........................	31
	Options TAD1, TAD2, TAD7: pressure compensator configuration with electric BPD....................................	31
	TAD* solenoid connectors...............................................................................................................................................	31
	Option TAC2: pressure compensator configuration without Brake Pressure Defeat......................................	31
	Options TA** – pressure compensator controls for 51 (frame size 160, 250)..........................................................	33
	Option TAC0: pressure compensator configuration with hydraulic Brake Pressure Defeat.........................	34
	Option TAC2: pressure compensator configuration without Brake Pressure Defeat......................................	34
	Options TH** – hydraulic two-position control for 51-1 (frame size: 060, 080, 110).............................................	35
	Pressure Compensator OverRide (PCOR).........................................................................................................................	35
	Option THCA: pressure compensator configuration with hydraulic Brake Pressure Defeat.........................	36
	Options THD1, THD2, THD7: pressure compensator configuration with electric BPD....................................	36
	THD* solenoid connectors...............................................................................................................................................	37
	Option THC2: pressure compensator configuration without Brake Pressure Defeat......................................	37
	Options TH** – hydraulic two-position control for 51 (frame size 160, 250)............................................................	38
	Pressure Compensator OverRide (PCOR).........................................................................................................................	38
	Option THC0: pressure compensator configuration with hydraulic BPD............................................................	39
	Option THC2: pressure compensator configuration without Brake Pressure Defeat......................................	39
	Options E1B1, E2B1, E7B1 – electrohydraulic two-position control for 51-1 (frame size 060, 080, 110)........	40
	E1B1, E2B1, E7B1 solenoid connectors.............................................................................................................................	41
	Options E1A5, E2A5 – electrohydraulic two-position control for 51 (frame size 160, 250).................................	42
	E1A5, E2A5 solenoid connectors.........................................................................................................................................	43
	Options F1B1, F2B1 – electrohydraulic two-position control for 51-1 (frame size 060, 080, 110)....................	44
	F1B1, F2B1 solenoid connectors.........................................................................................................................................	45
© Danfoss \| October 2017	520L0440 \| BC00000018en-US0401 \| 3

Technical Information
Series 51 and 51-1 Bent Axis Variable Displ. Motors
Contents
	Options F1A5, F2A5 – electrohydraulic two-position control for 51 (frame size 160, 250).................................	46
	F1A5, F2A5 solenoid connectors.........................................................................................................................................	47
	Options T1, T2, T7** – electrohydraulic two-position control for 51-1 (frame size 060, 080, 110)...........	48
	Option T*CA: pressure compensator configuration with hydraulic Brake Pressure Defeat..........................	49
	Options TD1, TD2, T* D7: pressure compensator configuration with electric BPD......................................	49
	T1D1, T2D2, T7D7 solenoid connectors......................................................................................................................	50
	Option T*C2: pressure compensator configuration without Brake Pressure Defeat.......................................	50
	Options T1, T2 – electrohydraulic two-position control for 51 (frame size 160, 250)...................................	51
	Option T*C0: pressure compensator configuration with hydraulic Brake Pressure Defeat..........................	52
	Option T*C2: pressure compensator configuration without Brake Pressure Defeat.......................................	52
	T1C2, T2C2 solenoid connectors...................................................................................................................................	52
	Options EP, EQ – electrohydraulic proportional control for 51 (all frame sizes).............................................	53
	Pressure Compensator Override (PCOR)..........................................................................................................................	54
	Options EPA1, EQA1: pressure compensator configuration with Brake Pressure Defeat..............................	55
	Options EPA2, EQA2: pressure compensator configuration without Brake Pressure Defeat.......................	55
	Options L1B1, L2B1, L7B1 – electrohydraulic proportional control for 51 (all frame sizes)................................	56
	L1B1, L2B1, L7B1 solenoid connectors..............................................................................................................................	57
	Options D7M1, D8M1 – electrohydraulic proportional control with PCOR and hydraulic BPD for 51
	(all frame sizes)........................................................................................................................................................................	58
	Options D7M1, D8M1: pressure compensator configuration with hydraulic Brake Pressure Defeat........	59
	D7M1, D8M1 solenoid connector..................................................................................................................................	59
	Options HS** – hydraulic proportional control for 51 (all frame sizes)......................................................................	60
	Pressure Compensator OverRide (PCOR).........................................................................................................................	60
	Option HSA1: pressure compensator configuration with Brake Pressure Defeat.............................................	61
	Option HSA2: pressure compensator configuration without Brake Pressure Defeat......................................	61
	Option HZB1 – hydraulic proportional control for 51 (all frame sizes).......................................................................	62
General dimensions – frame size 060
	SAE flange design per ISO 3019/1............................................................................................................................................	64
	DIN flange design per ISO 3019/2............................................................................................................................................	67
	Cartridge flange..............................................................................................................................................................................	70
General dimensions – frame size 080
	SAE flange design per ISO 3019/1............................................................................................................................................	73
	DIN flange design per ISO 3019/2............................................................................................................................................	76
	Cartridge flange..............................................................................................................................................................................	79
General dimensions – frame size 110
	SAE flange design per ISO 3019/1............................................................................................................................................	82
	DIN flange design per ISO 3019/2............................................................................................................................................	85
	Cartridge flange..............................................................................................................................................................................	88
General dimensions – frame size 160
	SAE flange design per ISO 3019/1............................................................................................................................................	91
	DIN flange design per ISO 3019/2............................................................................................................................................	93
	Cartridge flange..............................................................................................................................................................................	95
General dimensions – frame size 250
	SAE flange design per ISO 3019/1............................................................................................................................................	97
Dimension – Controls
	Options TA** for 51-1 – Pressure Compensator Control (Frame Size: 060, 080, 110)...........................................	99
	Options TA** for 51 – Pressure Compensator Control (Frame Size: 160, 250)......................................................	100
	Options TH** for 51-1 – Hydraulic Two-Position Control (Frame Size: 060, 080, 110)........................................	101
	Options TH** for 51 – Hydraulic Two-Position Control (Frame Size: 160, 250).....................................................	102
	Options EB1, FB1 for 51-1 – Electrohydraulic Two-Position Control (Frame Size: 060, 080, 110)...............	103
	Options EA5, FA5 for 51 – Electrohydraulic Two-Position Control (Frame Size: 160, 250)...........................	104
	Options T1, T2, T7** for 51-1 – Electrohydraulic Two-Position Control (Frame Size: 060, 080, 110).....	105
	Options T1C2, T2C2 for 51 – Electrohydraulic Two-Position Control (Frame Size: 060, 080, 110).................	106
	Options EPA1, EQA1 for 51 – Electrohydraulic Two-Position Control (All Frame Sizes)....................................	107
	Options L1B1, L2B1, L7B1 for 51 – Electrohydraulic Two-Position Control (All Frame Sizes)..........................	108
	Options D7M1, D8M1 for 51 – Electrohydraulic Two-Position Control (Frame Size: 060, 080, 110).............	109
4 \| © Danfoss \| October 2017	520L0440 \| BC00000018en-US0401

Technical Information

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

Contents

Options D7M1, D8M1 for 51 – Electrohydraulic Two-Position Control (Frame Size: 160, 250).......................	110
Option HSA* for 51 – Hydraulic Proportional Control (All Frame Sizes)..................................................................	111
Option HZB1 for 51 – Hydraulic Proportional Control (All Frame Sizes).................................................................	112

520L0440 | BC00000018en-US0401 | 5

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

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

		2
	6	5
	1
3	7	P001196

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

520L0440 | BC00000018en-US0401 | 7

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

6 5

3	1

P001831

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

Technical Information

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

Series 51 general information

Pictorial diagram

Control handle

Reversible variable displacement pump

Input shaft

Pump swashplate

Displacement control valve

Orificed check valve

Servo control cylinder

Servo

cylinder

	Bent axis variable
	displacement motor
case
Servo
pressure
relief
valves
	Output shaft
to motor	Synchronizing shaft
case

Loop flushing relief valve

Working loop	Working loop	Suction	Servo pressure	Case drain fluid	P001 175E
(High pressure)	(Low pressure)

System circuit diagram

	M3	A
		A
M1
M4
M5
M
M2
		B
S		L2

A	L2		M4	M3	N
A
					M1
					n
			max.
			disp.
		T2	T3
		T2
		T1	T7	T8	M5
		T1			M5
B					M2
	L1	X1	M7

Signal pressure supply

P001833E

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).

520L0440 | BC00000018en-US0401 | 9

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

Neumünster/Germany

Ident

Model No./Ident. No.

5084092

number

Model

Model Code

51V080 RS1N

code

L1B1 WB31 ADA

Serial

051AAF0 D400

Barcode

Serial No.

N982211215

number

serial number

Made in Germany

Place of manufacture

P001 832E

508 4092

Series 51-1 name plate

Neumünster/Germany

Ident

Model No./Ident. No.

511685

number

Model

Model Code

51D110-1-RD4N

code

E1B1 NNU2 ADD

Serial

030AAA3 0000

Barcode

Serial No.

N973212355

number

serial number

Made in Germany

Place of manufacture

P001 832E

511 685

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	Axial piston motor with variable displacement, bent axis design

Direction of rotation	Clockwise and counter-clockwise (bi-directional)

Recommended installation	Discretionary, the housing must always be filled with hydraulic fluid

Other system requirements	Independet braking system, circuit overpressure protection, suitable reservoir

Specific data

Physical properties

Features		Unit			Size

			060	080	110	160	250
			060	080	110	160	250

	Maximum		60.0 [3.66]	80.7 [4.92]	109.9	160.9	250 [15.26]
Displacement		cm3 [in3]			[6.71]	[9.82]
	Minimum		12 [0.73]	16.1 [0.98]	22 [1.34]	32.2 [1.96]	50.0 [3.05]

Theor. flow at	at rated speed	l/min	216 [57]	250 [66]	308 [81]	402 [106]	550 [145]
max. displ.	at max. speed	[US gal/min]	264 [71]	323 [85]	396 [105]	515 [136]	675 [178]
	at max. speed		264 [71]	323 [85]	396 [105]	515 [136]	675 [178]

Theor. corner power at rated		kW	252	300	371	480	638
speed and max. working pressure		kW	252	300	371	480	638
(Δp = 450 bar [6527 psi])		[hp]	[338]	[402]	[498]	[644]	[856]
(Δp = 450 bar [6527 psi])

Theoretical	at max. displ.	N•m/bar	0.95	1.28	1.75	2.56	3.98
torque		[lbf•in/1000 psi]	[583]	[784]	[1067]	[1563]	[2428]
	at min. displ.		0.19	0.26	0.35	0.51	0.80
			[117]	[156]	[214]	[313]	[486]
Mass moment of inertia of		kg•m2	0.0046	0.0071	0.0128	0.0234	0.0480
rotating components		[slug•ft2]	[0.1092]	[0.1685]	[0.3037]	[0.5553]	[1.1580]
Rated speed	at max. displ.		3600	3100	2800	2500	2200

	at min. displ.	min-1(rpm)	5600	5000	4500	4000	3400
	at min. displ.		5600	5000	4500	4000	3400

Maximum	at max. displ.		4400	4000	3600	3200	2700
	at max. displ.		4400	4000	3600	3200	2700

speed*	at min. displ.		7000	6250	5600	5000	4250
	at min. displ.		7000	6250	5600	5000	4250

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

520L0440 | BC00000018en-US0401 | 11

Technical Information

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

Technical specifications

System and case pressure

Parameter		Unit	All sizes

	Maximum delta		480 [7000]

System pressure	Maximum		510 [7400]

	Minimum low	bar [psi]	10 [145]

	Rated		3 [44]
	Rated		3 [44]

Case pressure	Maximum (cold start)		5 [73]

	Minimum (at rated speed)		0.3 [4.35]

Fluid specifications

Features		Unit	All sizes

	Minimum intermittent		7 [49]
		mm2/s
Viscosity	Recommended range	mm2/s	12-80 [66-366]
Viscosity	Recommended range	[SUS]	12-80 [66-366]
		[SUS]
	Maximum intermittent		1600 [7416]

	Minimum		-40 [-40]
		°C
Temperature range1)2)	Rated	°C	104 [220]
Temperature range1)2)	Rated	[°F]	104 [220]
	Maximum intermittent		115 [240]

	Required cleanliness per ISO 4406	-	22/18/13

Cleanliness and Filtration	Efficiency (charge pressure filtration)	β-ratio	β15-20 = 75 (β10 ≥ 10)
Cleanliness and Filtration	Efficiency (suction / return line filtration)	β-ratio	β35-45 = 75 (β10 ≥ 2)
	Efficiency (suction / return line filtration)		β35-45 = 75 (β10 ≥ 2)
	Recommended inlet screen mesh size	µm	100 – 125

1)At the hottest point, normally case drain port.

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

12 | © Danfoss | October 2017

520L0440 | BC00000018en-US0401

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

Vg • n

1000 •

Vg • p •

20 •

Pe =

Me • n

Qe • p • t

9550

600

n =

Qe • 1000 • v

Where:

Input flow (l/min)

Output torque (N•m)

Output power (kW)

Speed (min-1)

Motor displacement per rev. (cm3/rev)

phigh

High pressure (bar)

plow

Low pressure (bar)

∆p

High pressure minus Low pressure (bar)

ηv

Motor volumetric efficiency

ηmh

Mechanical-hydraulic efficiency

ηt

Motor total efficiency (ηv • ηmh)

Qe	=	Vg • n
Qe	=	231 •	v
Me	=	Vg •	p •	mh
Me	=	2 •
		2 •
Pe =		Vg • n • p • t
Pe =		396 000
		396 000
n =		Qe • 231 •		v
			Vg
Where:
Qe		Input flow [US gal/min]
Me		Output torque [lb•in]
Pe		Output power [hp]
n		Speed [rpm]
Vg		Motor displacement per rev. [in3/rev]
phigh		High pressure [psi]
plow		Low pressure [psi]
∆p		High pressure minus Low pressure [psi]
ηv		Motor volumetric efficiency
ηmh		Mechanical-hydraulic efficiency
ηt		Motor total efficiency (ηv • ηmh)

520L0440 | BC00000018en-US0401 | 13

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		Unit	All sizes

	Rated		3 [44]

Case pressure	Maximum (cold start)	bar [psi]	5 [73]

	Minimum (at rated speed)		0.3 [4.35]

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.

W 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			Size

			060	080	110	160	250
			060	080	110	160	250

Rated speed	at max. displ.		3600	3100	2800	2500	2200

	at min. displ.	min-1(rpm)	5600	5000	4500	4000	3400
	at min. displ.		5600	5000	4500	4000	3400

Maximum speed	at max. displ.		4400	4000	3600	3200	2700
	at max. displ.		4400	4000	3600	3200	2700

	at min. displ.		7000	6250	5600	5000	4250
	at min. displ.		7000	6250	5600	5000	4250

14 | © Danfoss | October 2017

520L0440 | BC00000018en-US0401

Technical Information

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

General technical specifications

Speed limits

Maximim speed

at min. displacement

Rated speed at min. displacement

<![if ! IE]>

<![endif]>Speed min-1 (rpm)

Curve determined by rated flow

Maximum speed

at max. displacement

Acceptable operating range

Rated speed

at max. displacement

Min. displacement	Max. displacement
Motor angle (degrees)	P001 781E

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]

520L0440 | BC00000018en-US0401 | 15

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

W 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

Loop flushing shuttle spool

Loop flushing relief valve

P001 782E

Hydraulic schematic

A B

P001 830

16 | © Danfoss | October 2017

520L0440 | BC00000018en-US0401

Technical Information

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

General technical specifications

Case flow characteristic

<![if ! IE]> <![endif]>pressure	[508]			E4 E6 F0		F3	G0 G3			H0
	[508]
	35
<![if ! IE]> <![endif]>case	[363]
<![if ! IE]> <![endif]>pressure minus bar [psi]	25
	[218]
	15
	[73]
	5
<![if ! IE]> <![endif]>system	5	0	5	10	15	20	25	30	35	40
			[1.3]	[2.6]	[4.0]	[5.3]	[6.6]	[8.0]	[9.2] [10.6]

<![if ! IE]> <![endif]>Low				Case flow l/min [US gal/min]
<![if ! IE]> <![endif]>Low									P001 860E
									P001 860E

Equation:

Where:

QFlush – flushing flow per motor

QCharge – charge flow at operating speed

kMo – number of motors feeded by one pump QLeak – sum of external leakages

QLeak includes:

•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

Minimum displacement limiter

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.

Hydraulic fluids

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.

C Caution

It is not permissible to mix hydraulic fluids.

Suitable hydraulic fluids:

520L0440 | BC00000018en-US0401 | 17

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.

Viscosity and temperature range

Features		Unit	All sizes

	Minimum intermittent		7 [49]
		mm2/s
Viscosity	Recommended range	mm2/s	12-80 [66-366]
Viscosity	Recommended range	[SUS]	12-80 [66-366]
		[SUS]
	Maximum intermittent		1600 [7416]

	Minimum		-40 [-40]
		°C
Temperature range1)2)	Rated	°C	104 [220]
Temperature range1)2)	Rated	[°F]	104 [220]
	Maximum intermittent		115 [240]

1)At the hottest point, normally case drain port.

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

Filtration system

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

Technical Information

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

General technical specifications

range of β35-45 = 75 (β10 ≥ 2) or better has been found to be satisfactory. For some open circuit systems, 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 β15-20 = 75 (β10 ≥ 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	22/18/13

Efficiency βx (charge pressure filtration)	β15-20 = 75 (β10	≥ 10)
Efficiency βx (suction and return line filtration)	β35-45 = 75 (β10	≥ 2)
Recommended inlet screen mesh size	100 – 125 µm

Fluid selection

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.

C 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.

Reservoir

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.

Independent braking system

W Warning

520L0440 | BC00000018en-US0401 | 19

Technical Information

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

General technical specifications

Motor bearing life

The rated motor bearing life Lh10 shown in the table below is based on a 90 % survival rate of shaft 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.

The rated motor bearing life Lh10 (hours)

Frame Size	Effective ∆ pressure		Motor angle
	bar [psi]	6°	15°	32°
		6°	15°	32°

	140 [2030]	19 800	18 530	16 370
060
060	210 [3050]	6320	5960	5340

	280 [4060]	2740	2600	2350

	140 [2030]	14 420	13 580	12 120
080
080	210 [3050]	4610	4370	3960

	280 [4060]	2000	1910	1750

	140 [2030]	15 800	14 890	13 330
110
110	210 [3050]	5040	4790	4350

	280 [4060]	2180	2090	1920

	140 [2030]	15 670	14 770	13 200
160
160	210 [3050]	5005	4750	4300

	280 [4060]	2170	2070	1900

	140 [2030]	11 760	11 130	10 020
250
250	210 [3050]	3750	3580	3260

	280 [4060]	1630	1560	1440

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

L2 =	L1 • 1500	hours
	n2

Where:
L1	= Rated L10 life at 1500 min-1 (rpm)
n2	= Operating speed

Units:

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

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

SAE-Flange design per ISO 3019/1				Fr OPTIMUM LOAD
				Fr OPTIMUM LOAD
X2 > X1	X2 < X1			ORIENTATION
				ORIENTATION
			35°
		35°	35°
		35°

DIN-Flange design per ISO 3019/2

X2 > X1

X2 < X1

35°

Fr OPTIMUM LOAD

ORIENTATION

35°

Cartridge Flange design		Fr OPTIMUM LOAD
Cartridge Flange design

		ORIENTATION
		ORIENTATION

X2 > X1	X2 < X1	35°	35°
X2 > X1	X2 < X1	35°
	X1
	A
	Fr
Fa

P001 166E

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			Frame Size

			060	080		110	160	250

Maximum allowable radial load	Fr		10 000	12 000		14 000	18 000	26 000
		N [lb]	[2248]	[2698]		[3147]	[4047]	[5845]

Max. allow. axial load at zero rpm, or	Fa		1100	1400		1800	2500	4500
Max. allow. axial load at zero rpm, or	Fa		1100	1400		1800	2500	4500
running in the idle pressure			[247]	[315]		[405]	[562]	[1012]

Max. allowable bending moment	M	N•m	252	307		766	805	970
		[lb•in]	[2230]	[2717]		[6780]	[7125]	[8585]

Max. allowable axial load at pressure	Fa/∆p	N/bar	10.4	12.6		15.2	19.2	26.4
		[lb/1000 psi]	[161]	[195]		[236]	[298]	[409]

Distance SAE mounting flange			33.6	33.6		62.7	52.7	45.3
			[1.32]	[1.32]		[2.47]	[2.07]	[1.78]

Distance DIN mounting flange	X1		57.2	57.6		94.7	84.7	–
	X1	mm [in]	[2.25]	[2.27]		[3.73]	[3.33]	–

Distance Cartridge mount. flange			117.6	136.1		177.5	–	–
Distance Cartridge mount. flange			117.6	136.1		177.5
			[4.63]	[5.36]		[7.0]
			[4.63]	[5.36]		[7.0]

Basic distance	A		25.2	25.6		54.7	44.7	37.3
			[0.99]	[1.01]		[2.15]	[1.76]	[1.47]

– = not available

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

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

	100
	100
	95
<![if ! IE]> <![endif]>%
<![if ! IE]> <![endif]>Efficiency	90
	90
	85
	80
	0

volum

tric efficiency η

= 210 bar [3050 psi]

bar

[6090 psi]

]

[

ηt

]

25	50	75	100
	Speed % of rated speed		P001 155E

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

<![if ! IE]>

<![endif]>System pressure bar [psi]

420
[6090]
280				94.5%
[4060]				94.5%
[4060]
				93.5%
140
[2030]				90.5%
				84.5%
0				74.5%
0	0	25	50	75	100
	0	25	50	75	100

Speed% of rated speed

P001 137E

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.

520L0440 | BC00000018en-US0401 | 23

Technical Information

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

General technical specifications

Overall and volumetric efficiency at 30% of maximum displacement

100



volumetric efficiency ηv				= 210 bar [3050 psi]
volumetric efficiency ηv

	η	v	=	4	20 bar [6090 psi]
		v

<![if ! IE]>

<![endif]>Efficiency %

overall efficiency	η			= 210 b
			t		ar [3
			t			050 psi]
						050 psi]
η
η		=
				4
t				20ba
					r[
					60
						90	p
							si]

0	25	50	75	100
		Speed % of rated speed		P001 156E

Overall efficiency at 30% of maximum displacement

<![if ! IE]>

<![endif]>System pressure bar [psi]

420
[6090]
280
[4060]
			81%
			80%
140			77%
[2030]			77%
[2030]
			71%
			61%
0	25	50	75	100
0	25	50	75	100

Speed % of rated speed	P001 138E

520L0440 | BC00000018en-US0401

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	060	080	110	160	250

Pulze/Rev	45	49	54	61	71

Speed sensor technical data

Supply voltage1)	4.5 – 8.5 VDC
Supply voltage regulated	15 VDC max.
Required current	12 mA at 5 VDC (no load)
Maximum current	20 mA at 5 VDC and 1 Hz
Maximum frequency	15 kHz

Voltage "high"	Supply voltage -0.5 VDC min.
Voltage "low"	0.5 VDC max.
Temperature range	-40 to 110 °C [-40 to 230 °F]

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.

Speed sensor with Turck Eurofast 4-pin connector

P001 492

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


Turck Eurofast Connector		Keyway (Ref)
4 pin			2	1
(Supplied connector)
IP Rating (DIN 40 050) IP 67
Mating connector
straight	right angle		3	4
No.: K14956	No.: K14957

Id.-No.: 500724	Id.-No.: 500725			P001 755E

Speed sensor with Packard Weather-Pack 4-pin connector

Red

P002 108E

520L0440 | BC00000018en-US0401 | 25

Technical Information

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

General technical specifications

Packard Weather-Pack

4 pin A

(Supplied Connector) B

Mating Connector	C
	D
No.: K03379		P001 758E
Id.-No.: 505341

Contact your Danfoss representative for more information.

Typical control and regulator applications

Application

Control / Regulators

without PCOR

with PCOR

with PCOR and BPD

E1, E2, E7

EP, EQ

F1, F2

L1, L2, L7

T1, T2

EP, EQ

D7, D8

Wheel loader1)

Roller compactor1)

Paver wheeled1)

Paver tracked1)

Sweeper1)

Trencher1)

Excavator wheeled1)

Fork lift truck1)

Agricultural1)

Forestry1)

Telehandler1)

Railroad1)

Snow groomer1)

Snow blower2)

Crane3)

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.

520L0440 | BC00000018en-US0401

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)

	L2		N
	A
			n
		min.
		disp.
	T3
	T2
X1	M5
X1	B
(M3)	B
(M3)
	L1	M4	P001 779E
	L1

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

	30
<![if ! IE]> <![endif]>[psi]	[435]
<![if ! IE]> <![endif]>[psi]
<![if ! IE]> <![endif]>bar	20
<![if ! IE]> <![endif]>bar	[290]
<![if ! IE]> <![endif]>pressure	[290]
<![if ! IE]> <![endif]>pressure	10		minimum servo pressure
<![if ! IE]> <![endif]>Servo	10		minimum servo pressure
	[145]		under all conditions
	[145]

	00	100	200	300	400
		[1450]	[2900]	[4350]	[5800]
		System pressure bar [psi]			P001 877E
					P001 877E

520L0440 | BC00000018en-US0401 | 27

Technical Information

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

Controls circuit diagram – nomenclature – description

Control operation N1NN

<![if ! IE]>

<![endif]>Control pressure


min
min		max

Displacement

P001 875E

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)

L2		M4	M3	N
A
				M1
				n
		max.
		disp.
		T3
	T2
	T1	T7	T8	M5
	T1			M5
B				M2
L1	X1	M7		P100 177E

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

520L0440 | BC00000018en-US0401

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

					<![if ! IE]> <![endif]>bar [psi]
			<![if ! IE]> <![endif]>3 [44]		<![if ! IE]> <![endif]>pressure
			<![if ! IE]> <![endif]>3 [44]		<![if ! IE]> <![endif]>pressure
				<![if ! IE]> <![endif]>0	<![if ! IE]> <![endif]>Control
min
min	Displacement	max
	Displacement

P100 179E

Not all control options are shown in this Technical Information.

Contact your Danfoss representative for special control functions.

520L0440 | BC00000018en-US0401 | 29

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**

M3 with Electric brake pressure defeat

XB XA

M3 with Hydraulic brake pressure defeat

		A
	T3
	M3	B
	without	B
	without
	Brake pressure
	defeat

L2	N
	n
	min.
	disp.
L1	M4
	P001 834E

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**

		<![if ! IE]> <![endif]>Regulator start	<![if ! IE]> <![endif]>Setting range	<![if ! IE]> <![endif]>370	<![if ! IE]> <![endif]>[5370]	<![if ! IE]> <![endif]>p bar [psi]
				<![if ! IE]> <![endif]>130	<![if ! IE]> <![endif]>[1890]	<![if ! IE]> <![endif]>pressure
min		max <10bar[145psi]				<![if ! IE]> <![endif]>System
	Displacement	<![if ! IE]> <![endif]>Ramp
		<![if ! IE]> <![endif]>Ramp
				P001 173E

520L0440 | BC00000018en-US0401

+ 86 hidden pages