Danfoss M46 User guide

Download

Technical Information

Axial Piston Pumps

Series 40 M46

powersolutions.danfoss.com

Technical Information

Series 40 M46 Pumps

Revision history Table of revisions

Date Changed Rev

March 2017 Minor updates - FNR Control options 0209

October 2016 Minor updates 0208

May 2015 more corrections to tandem pumps model code BG

March 2015 correction to tandem pumps model code BF

January 2015 minor edits BE

January 2015 added port callouts - HC EDC drawings BD

November 2014 corrections to shaft options BC

July 2014 Edits to HC EDC Schematic BB

April 2014 Danfoss layout BA

2 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Technical Information

Series 40 M46 Pumps

Specifications

General Information

Features and Options

Operating Parameters

System Design Parameters

Model Code - Single Pumps

Model Code - Tandem Pumps

Options

Design Specifications......................................................................................................................................................................5

Technical Specifications.................................................................................................................................................................5

Operating Parameters.....................................................................................................................................................................5

Options.................................................................................................................................................................................................6

Fluid specifications.......................................................................................................................................................................... 6

M46 Pumps.........................................................................................................................................................................................7

M46 Variable Pumps........................................................................................................................................................................7

System Circuit Diagram..................................................................................................................................................................8

Schematic Diagram..........................................................................................................................................................................8

Features................................................................................................................................................................................................9

Fluids.................................................................................................................................................................................................. 10

Viscosity........................................................................................................................................................................................10

Temperature...............................................................................................................................................................................10

Charge Pressure..............................................................................................................................................................................10

Control Pressure............................................................................................................................................................................. 10

Case Pressure...................................................................................................................................................................................11

System Pressure..............................................................................................................................................................................11

Speed Ratings..................................................................................................................................................................................11

Inlet Pressure................................................................................................................................................................................... 12

Sizing Equations............................................................................................................................................................................. 13

Filtration............................................................................................................................................................................................ 13

Suction Filtration.......................................................................................................................................................................14

Charge Pressure Filtration..................................................................................................................................................... 14

Redundant Braking System Requirement.............................................................................................................................15

Loop Flushing..................................................................................................................................................................................15

Reservoir............................................................................................................................................................................................15

Case Drain Usage for Tandem Pumps.................................................................................................................................... 15

Bearing Life and External Shaft Loading................................................................................................................................16

Hydraulic Unit Life......................................................................................................................................................................... 17

Mounting Flange Loads...............................................................................................................................................................17

Shaft Torques...................................................................................................................................................................................19

Shaft selection........................................................................................................................................................................... 19

Shaft torque and spline lubrication................................................................................................................................... 19

Shaft torque for tapered shafts............................................................................................................................................19

Single Pumps...................................................................................................................................................................................20

Tandem Pumps...............................................................................................................................................................................24

Shaft options....................................................................................................................................................................................28

Single pumps............................................................................................................................................................................. 28

Tandem pumps......................................................................................................................................................................... 30

Charge Pump...................................................................................................................................................................................31

Charge Pump Output Flow...................................................................................................................................................32

Charge Pump Power Requirements.................................................................................................................................. 32

Charge Relief Valve........................................................................................................................................................................32

High Pressure Relief Valve (HPRV) and Charge Check......................................................................................................33

Bypass Function..............................................................................................................................................................................34

Displacement Limiters................................................................................................................................................................. 34

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 3

Technical Information

Series 40 M46 Pumps

Contents

Auxiliary Mounting Pads and Auxiliary Pumps................................................................................................................... 35

Manual Displacement Control (MDC) - Options AB, AC, AK, AW, and GB..................................................................36

Hydraulic Displacement - Options BA, BB and BC..............................................................................................................38

Electrical Displacement Control- Options CE, CG, CM, and CN..................................................................................... 41

High Current Electric Displacement Control - Options HA (12Vdc) and HB (24Vdc).............................................44

Response times..........................................................................................................................................................................46

Manual OverRide (MOR).............................................................................................................................................................. 46

Three-position Electrical Control - Options DA and DB................................................................................................... 47

Port Locations

Single Pump.....................................................................................................................................................................................50

Tandem Pump.................................................................................................................................................................................51

Installation Drawings - Single Pump Dimensions

Auxiliary Mounting Flanges....................................................................................................................................................... 52

Pump, filtration/charge pump options, MDC, displacement limiter...........................................................................53

Installation Drawings - Tandem Pump Dimensions

Auxiliary mounting flange..........................................................................................................................................................54

Rear mounting boss......................................................................................................................................................................55

Pumps, filtration/charge pump options, MDC, displacement limiters.......................................................................56

Control Options - Installation Drawings

Control options, AC, AK............................................................................................................................................................... 57

Option GB......................................................................................................................................................................................... 57

Options AB, AW...............................................................................................................................................................................58

HC EDC Control...............................................................................................................................................................................59

Hydraulic displacement control (HDC).................................................................................................................................. 60

Option CE..........................................................................................................................................................................................61

Options CG, CN............................................................................................................................................................................... 61

Options DA, DB............................................................................................................................................................................... 62

Reference Literature

Literature...........................................................................................................................................................................................63

4 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Technical Information

Series 40 M46 Pumps

Specifications

Design Specifications

Technical Specifications

Product line Pump type Direction rotation Installation position Filtration configuration Other system requirements

Model Displacement Shaft Speed Minimum

Rated Maximum

System Pressure Maximum working*

Maximum

Minimum low loop Weight (MDC without aux pad) Mass moment of inertia of the rotating

components Charge Pressure Minimum

Maximum Control Pressure

Case Pressure Continuous

Inlet Pressure Rated

Minimum @ corner

power

Maximum (cold

start)

Minimum

Series 40 Pumps

In-line, axial piston, variable, positive displacement pumps

Clockwise (CW) or counterclockwise (CCW) available

Discretionary, the housing must be filled with hydraulic fluid

Suction or charge pressure filtration

Independent braking system, suitable reservoir and heat exchanger

Unit M46 Single Pump M46 Tandem Pump

cm3/rev [in3/rev] 45.9 [2.80] 45.9 x 2 [2.80 x 2]

min-1 (rpm)

min-1 (rpm) 4000

min-1 (rpm) 4100

bar [psi] 345 [5000]

385 [5585]

10 [145]

kg [lb] 33 [73] 59 [131]

kg ·m2 [slug·ft2] 0.0050 [0.0037] 0.0100 [0.0073]

bar [psi] 6 [87]

31 [450]

bar [psi] 21.5 [312]

bar [psi] 1.7 [25]

5.2 [75]

bar absolute [inches of Mercury vacuum]

0.8 [6]

6 [9.2 Maximum]

* Operation above maximum working pressure is permissible with Danfoss application approval.

Operating Parameters

Fluid Viscosity

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 5

Minimum mm2/s (cSt) [SUS] 7 [49]

Continuous Maximum (cold start) Intermittent

12-16 [70-278]

1600 [7500]

6 [46]

Technical Information

Series 40 M46 Pumps

Specifications

Options

Fluid Temperature

(1) Intermittent equals a short period of time at less than one minute per incident and not exceeding two percent of duty cycle based on load life.

Mounting Flange Input Shaft Ø 25.4 mm [1.000 in] straight keyed

Auxillary Mounting Flange

Main Port Configuration

Minimum (intermittent cold start)

Continuous Maximum Intermittent

SAE - B X X

Ø 25.4 mm [1.000 in] 1:8 taper (SAE J501) 13-tooth, 16/32 pitch (ANSI B92.1 1970 - Class 5) 15-tooth, 16/32 pitch (ANSI B92.1 1970 - Class 5) 19-tooth, 16/32 pitch (ANSI B92.1 1970 - Class 5) 9-tooth internal spline, 16/32 pitch (SAE A) 11-tooth internal spline, 16/32 pitch (SAE A) 13-tooth internal spline, 16/32 pitch (SAE B) 15 - tooth internal spline, 16/32 pitch (SAE BB)

1-5/16 - 12 SAE A straight thread O-ring Ports (SAE J514) X X

degrees C [degrees F] - 40° C [- 40° F]

82.2° C [180° F]

104.4° C [220° F]

Single Tandem

X X

X -

X X

- X

X X

- X

Fluid specifications

Ratings and data are based on operation with premium petroleum-based hydraulic fluids reftaining oxidation, rust, and foam inhibitors.

Parameter Unit Minimum reftinuous Maximum

Viscosity mm /sec (cSt)

Temperature °C [°F] -40 [-40] 82 [180] 104 [220] Cleanliness ISO 4406 Class 18/13 or better Filtration

efficiency

suction filtration β charge filtration β

[SUS]

7 [47] 12-60 [70-278] 1600 [7500]

=75 (β10≥1.5)

35-44

=75 (β10≥10)

15-20

6 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Input

shaft

Auxiliary

pad

Control

Charge check/

high pressure relief

valve

Charge relief valve

Charge

pump

Valve plate

Piston

Cylinder

block

Cradle swashplate

Ball

bearing

P100 585E

Technical Information

Series 40 M46 Pumps

General Information

M46 Pumps

M46 Variable Pumps

M46 pumps are designed for medium power applications with maximum loads of 345 bar [5000 psi]. These pumps can be combined with other products in a system to transfer and control hydraulic power.

M46 pumps provide an infinitely variable speed range between zero and maximum in both forward and reverse modes of operation.

M46 pumps are compact, high power density units. All models use the parallel axial piston / slipper concept in conjunction with a tiltable swashplate to vary the pump’s displacement. Reversing the angle of the swashplate reverses the flow of fluid from the pump, reversing the direction of rotation of the motor output.

M46 pumps may include an integral charge pump to provide system replenishing and cooling fluid flow, as well as servo control fluid flow. M46 pumps feature a range of auxiliary mounting pads to accept auxiliary hydraulic pumps for use in complementary hydraulic systems.

M46 pumps offer proportional controls with either manual, hydraulic, or electronic actuation. An electric three-position control is also available.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 7

Input shaft

Suction flow

Servo pressure

High pressure

Case flow

Charge pressure

Output shaft

Cylinder block assembly

Filter

Charge

pump

Reservoir

Fixed displacement motor

Cylinder

block

assembly

Heat exchanger

Check valves w/ high pressure relief valve

Variable displacement pump

Heat exchanger bypass

Charge relief valve

Displacement control valve

Control handle

Bypass

valve

Loop flushing

module

P100586

B N A

P100587

Technical Information

Series 40 M46 Pumps

General Information

System Circuit Diagram

Schematic Diagram

8 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Technical Information

Series 40 M46 Pumps

Features and Options

Features

Options

•

Efficient Axial Piston Design

•

Compact, Lightweight Pumps

•

Worldwide Support

•

Low Noise

•

Single and Tandem Integrated Tandem Configurations

•

Manual, Hydraulic or Electric Control

High Pressure Relief Valve (HPRV) - A high pressure relief valve limits the system pressure to protect the system from over-pressure.

Charge Relief Valve - The charge pressure relief valve regulates charge pressure. Displacement Limiters - Optional displacement limiters allow maximum displacement adjustment to

allow for fine tuning of the propel system.

Auxiliary Mounting Pads - Several auxiliary mounting pad options allow for adding a second pump. Control Options - Control options include manual displacement control (MDC), hydraulic displacement

control (HDC), electric displacement control (EDC), and threeposition electric displacement control (FNR). Input Shafts - Straight keyed, tapered keyed, and several splined shaft options are available.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 9

Technical Information

Series 40 M46 Pumps

Operating Parameters

Fluids

Ratings and performance data are based on operating with premium hydraulic fluids containing oxidation, rust, and foam inhibitors. These include premium turbine oils, API CD engine oils per SAE J183, M2C33F or G automatic transmission fluids (ATF), Dexron II (ATF) meeting Allison C-3 or Caterpillar T0‑2 requirements, and certain specialty agricultural tractor fluids. For more information on hydraulic fluid selection, see Danfoss publications: Hydraulic Fluids and Lubricants, Technical Information, 520L0463 and,

Experience with Biodegradable Hydraulic Fluids, Technical Information,520L465.

Viscosity

For maximum efficiency and bearing life, ensure the fluid viscosity remains in the recommended range. The minimum viscosity should be encountered only during brief occasions. Maximum temperature is based on material properties. Measure maximum temperature at the hottest

point in the system. This is usually the case drain. The maximum viscosity should be encountered only at cold start, and is merely a reflection of a viscosity condition supporting an engine start, at idle. Normal vehicle operation and performance should not occur until the fluid viscosity improves with increrased temperature. For more information on viscosity, see Danfoss publication, Hydraulic Fluids and Lubricants,

Technical Information 520L0463.

Charge Pressure

Temperature

Maintain fluid temperature within the limits shown in the table. Minimum temperature relates to the physical properties of the component materials. Cold oil will not affect the durability of the pump components. However, it may affect the ability of the pump to transmit power.

Maximum temperature is based on material properties. Measure maximum temperature at the hottest point in the system. This is usually the case drain.

Ensure fluid temperature and viscosity limits are concurrently satisfied.

An internal charge relief valve regulates charge pressure. Charge pressure supplies the control with pressure to operate the swashplate and to maintain a minimum pressure in the low side of the transmission loop.

The charge pressure setting listed in the order code is the set pressure of the charge relief valve with the pump in neutral, operating at 1800 min-1 [rpm], and with a fluid viscosity of 32 mm2/s [150 SUS]. Pumps configured with no charge pump (external charge supply) are set with a charge flow of 19 l/min [5 US gal/ min] (single pumps), 38 l/ min [10 US gal/min] (tandem pumps), and a fluid viscosity of 32 mm2/s [150 SUS].

The charge pressure setting is referenced to case pressure. Charge pressure is the differential pressure above case pressure.

Minimum charge pressure is the lowest pressure allowed in order to maintain a safe working condition in the low side of the loop. Minimum control pressure requirements are a function of speed, pressure, and swashplate angle, and may be higher than the minimum charge pressure shown in the Specifications section.

Maximum charge pressure is the highest charge pressure allowed by the charge relief adjustment, and which provides normal component life. Elevated charge pressure can be used as a secondary means to reduce the swashplate response time.

Control Pressure

Control pressure is the pressure in the servo system needed to position and hold the pump on stroke. Servo pressure depends on system pressure and speed.

10 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Technical Information

Series 40 M46 Pumps

Operating Parameters

Case Pressure

System Pressure

At minimum control pressure, the pump will run at reduced stroke depending on speed and pressure. Minimum control pressure at corner power holds the pump on full stroke at maximum speed and

maximum pressure. Maximum control pressure is the highest pressure typically given by the charge pressure setting.

Under normal operating conditions, do not exceed rated case pressure. During cold start, keep case pressure below maximum intermittent case pressure.

CAUTION

Operating outside of charge and case pressure limits will damage the pump. To minimize this risk, use full size inlet and case drain plumbing, and limit line lengths.

System pressure is the differential pressure between high pressure system ports. It is the dominant operating variable affecting hydraulic unit life. High system pressure, which results from high load, reduces expected life. Hydraulic unit life depends on the speed and normal operating, or weighted average, pressure that can only be determined from a duty cycle analysis.

Application pressure is the high pressure relief or pressure limiter setting normally defined within the order code of the pump. This is the applied system pressure at which the driveline generates the maximum calculated pull or torque in the application.

Maximum Working pressure is the highest recommended application pressure. Maximum working pressure is not intended to be a continuous pressure. Propel systems with application pressures at, or below, this pressure should yield satisfactory unit life given proper component sizing.

Maximum pressure is the highest allowable application pressure under any circumstance. Application pressures above maximum working pressure will only be considered with duty cycle analysis and factory approval.

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

All pressure limits are differential pressures referenced to low loop (charge) pressure. Subtract low loop pressure from gauge readings to compute the differential.

Speed Ratings

Minimum speed is the lowest input speed recommended during engine idle condition. Operating below

minimum speed limits the pump’s ability to maintain adequate flow for lubrication and power transmission.

Rated speed is the highest input speed recommended at full power condition. Operating at or below this speed should yield satisfactory product life.

Maximum speed is the highest operating speed permitted. Exceeding maximum speed reduces product life and can cause loss of hydrostatic power and braking capacity. Never exceed the maximum speed limit under any operating conditions.

Operating conditions between rated speed and maximum speed should be restricted to less than full power and to limited periods of time. For most drive systems, maximum unit speed occurs during downhill braking or negative power conditions.

For more information consult Pressure and Speed Limits BLN-9884, when determining speed limits for a particular application.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 11

Technical Information

Series 40 M46 Pumps

Operating Parameters

Inlet Pressure

During hydraulic braking and downhill conditions, the prime mover must be capable of providing sufficient braking torque in order to avoid pump over speed. This is especially important to consider for turbocharged and Tier 4 engines.

Warning

Unintended vehicle or machine movement hazard.

The loss of hydrostatic drive line power, in any mode of operation (forward, neutral, or reverse) may cause the system to lose hydrostatic braking capacity. You must provide a braking system, redundant to the hydrostatic transmission, sufficient to stop and hold the vehicle or machine in the event of hydrostatic drive power loss.

Achieving acceptable pump life and performance requires proper charge pump inlet design. A continuous inlet pressure of not less than 0.8 bar absolute (not more than 6.3 inches Hg vacuum) is recommended. Normal pressure less than the minimum inlet pressure of 0.7 bar absolute (greater than

9.2 inches Hg vacuum) indicates inadequate inlet design or a restricted filter. Pressures less than 0.7 bar absolute (greater than 9.2 inches Hg vacuum) during cold start are likely, but should improve quickly as the fluid warms.

12 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Based on SI units

= (l/min)

Input torque M = (N•m)

Input power P = = (kW )

Based on US units

= (US gal/min)

Input torque M = (lbf•in)

Input power P = = (hp)

Vg • n • η

1000

Vg • ∆p

20 • π • η

Q • ∆p

600 • η

M • n • π

30 000

Vg • n • η

231

Vg • ∆p

2 • π • η

Q • ∆p

1714 • η

M • n • π 198 000

Flow

Torque

Power

Technical Information

Series 40 M46 Pumps

System Design Parameters

Sizing Equations

Use these equations to help choose the right pump size and displacement for your application.

Variables

SI units [US units] Vg = Displacement per revolution cm3/rev [in3/rev] pO = Outlet pressure bar [psi] pi = Inlet pressure bar [psi] ∆p = pO - pi (system pressure) bar [psi] n = Speed min-1 (rpm) ηv = Volumetric efficiency ηm = Mechanical efficiency ηt = Overall efficiency (ηv • ηm)

Filtration

Ensure fluid entering pump is free of contaminants to prevent damage (including premature wear) to the system. M46 pumps require system filtration capable of maintaining fluid cleanliness at ISO 4406-1999 class 22/18/13 or better.

Consider these factors when selecting a system filter:

•

Cleanliness specifications

•

Contaminant ingression rates

•

Flow capacity

•

Desired maintenance interval

Locate filter either on the inlet (suction filtration) or discharge (charge pressure filtration) side of the charge pump.

Filter efficiency can be measured with a Beta ratio¹ (βX). For simple suction-filtered closed circuit transmissions and open circuit transmissions with return line filtration, a filter with a β-ratio within the range of β35-45 = 75 (β10 ≥ 2) or better has been found to be satisfactory. Systems with multiple cylinders that are feed from a single reservoir require a more efficient filter. This also applies to systems with gears or clutches using a common reservoir.

For high volume systems, use a charge pressure or return filtration system with a filter β-ratio in the range of β15-20 = 75 (β10 ≥ 10) or better.

Because each system is unique, only a thorough testing and evaluation program can fully validate the filtration system. Please see Design Guidelines for Hydraulic Fluid Cleanliness Technical Information 520L0467 for more information.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 13

Reservoir

Filter

Charge

pump

Charge relief

valve

To pump case

To low pressure

side of loop

and servo control

Strainer

P100588

Technical Information

Series 40 M46 Pumps

System Design Parameters

Cleanliness level and βx-ratio

Filtration (recommended minimum)

Filter βx-ratio is a measure of filter efficiency defined by ISO 4572. It is defined as the ratio of the number

Cleanliness per ISO 4406 22/18/13 Efficiency (charge pressure

filtration) Efficiency (suction and

return line filtration) Recommended inlet screen

mesh size

β-ratio β

μm 100 – 125

= 75 (β10 ≥ 10)

15-20

= 75 (β10 ≥ 2)

35-45

of particles greater than a given diameter (“x” in microns) upstream of the filter to the number of these particles downstream of the filter.

Suction Filtration

The filter is located between the reservoir and the charge pump inlet, as shown in the accompanying illustration.

CAUTION

Operating outside of charge and case pressure limits will damage the pump. To minimize this risk, use full size inlet and case drain plumbing, and limit line lengths.

Suction filtration

Charge Pressure Filtration

The filter is mounted remotely after the charge pump outlet, as shown in the accompanying illustration. For charge pressure filtration, use a filter that is rated to at least 34.5 bar [500 psi] pressure. Use a 100 -

125 μm screen in the reservoir or charge inlet line. A bypass valve is necessary to prevent filter damage and to avoid contaminants from being forced

through the filter by high pressure. In the event of high pressure drop associated with a blocked filter or cold start-up conditions, fluid will bypass the filter. Avoid working with an open bypass for an extended period. We recommend a visual or electrical bypass indicator. Proper filter maintenance is mandatory.

14 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Reservoir

Filter

with bypass

Charge

pump

Charge relief

valve

To pump case

To Low Pressure

side of loop

and servo control

Strainer

P106102

Technical Information

Series 40 M46 Pumps

System Design Parameters

Charge filtration

Redundant Braking System Requirement

Warning

Unintended vehicle or machine movement hazard

Loop Flushing

Closed circuit systems may require loop flushing to meet temperature and cleanliness requirements. A loop flushing valve removes hot fluid from the low pressure side of the system loop for additional cooling and filtering. Ensure the charge pump provides adequate flow for loop flushing and the loop flushing valve does not cause charge pressure to drop below recommended limits.

Reservoir

The reservoir provides clean fluid, dissipates heat, and removes entrained air from the hydraulic fluid. It allows for fluid volume changes associated with fluid expansion and cylinder differential volumes. Minimum reservoir capacity depends on the volume needed to perform these functions. Typically, a capacity of one half the charge pump flow (per minute) is satisfactory for a closed reservoir. Open circuit systems sharing a common reservoir require greater fluid capacity.

Locate the reservoir outlet (suction line) near the bottom, allowing clearance for settling foreign particles. Use a 100 - 125 μm screen covering the outlet port.

Place the reservoir inlet (return lines) below the lowest expected fluid level, as far away from the outlet as possible.

Use a baffle (or baffles) between the reservoir inlet and outlet ports to promote de-aeration and reduce fluid surging.

Case Drain Usage for Tandem Pumps

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 15

The tandem housings are connected through the center section via a drilled hole. The charge relief valve discharges oil into the front housing. In order to provide positive flow through both housings, use a case

Technical Information

Series 40 M46 Pumps

System Design Parameters

drain in the rear housing. The front housing case drain ports should only be used if the pump is used as a common drain manifold for the vehicle where external drain flow is brought into the rear housing and discharged out the front.

Allowable case pressure limits must be satisfied.

Bearing Life and External Shaft Loading

Bearing life is a function of speed, system pressure, charge pressure, and swashplate angle, plus any

external side or thrust loads. Other life factors include oil type and viscosity. The influence of swashplate angle includes displacement as well as direction. External loads are found in applications where the pump is driven with side/thrust load (belt or gear) as well as in installations with misalignment and improper concentricity between the pump and drive coupling.

In vehicle propel drives with no external shaft loads and where the system pressure and swashplate angle are changing direction and magnitude regularly, the normal L20 bearing life (80% survival) will exceed the hydraulic load-life of the unit.

In non propel drives such as vibratory drives, conveyor drives, or fan drives, the operating speed and pressure are often nearly constant and the swashplate angle is predominantly at maximum. These drives have a distinctive duty cycle compared to a propulsion drive. In these types of applications a bearing life review is recommended.

M46 pumps are designed with bearings that can accept some external radial and thrust loads. When external loads are present, the allowable radial shaft loads are a function of the load position relative to the mounting flange, the load orientation relative to the internal loads, and the operating pressures of the hydraulic unit. In applications where external shaft loads can not be avoided, the impact on bearing life can be minimized by proper orientation of the load. Optimum pump orientation is a consideration of the net loading on the shaft from the external load, the pump rotating group, and the charge pump load. A high capacity (cylindrical roller) input shaft bearing is available for applications with high external shaft loads. Contact your Danfoss representative.

In applications where the pump is operated such that nearly equal amounts of forward vs reverse

•

swashplate operation is experienced; bearing life can be optimized by orientating the external side load to the 0 or 180 deg position (90 deg to rotating group load Fb). See drawing.

In applications where the pump is operated such that the swashplate is predominantly (>75%) on

•

one side of neutral (e.g. vibratory, conveyor, typical propel); bearing life can be optimized by orientating the external side load generally opposite of the internal rotating group load, Fb. The direction of the internal loading is a function of rotation and system port, which has flow out.

Avoid axial thrust loads in either direction.

•

The maximum allowable radial loads (Re), based on the maximum external moment (Me) and the distance (L) from the mounting flange to the load, may be determined from the tables below and the cross section drawing.

The maximum allowable radial load is calculated as: Re = Me / L Contact your Danfoss representative for an evaluation of unit bearing life if continuously applied external

radial loads are 25% or more of the maximum allowable, or if thrust loads are known to exist.

Shaft loading parameters

Re Maximum external radial load Me Me Maximum external moment L Distance from mounting flange to point of load Fb Force of cylinder block Te Thrust external load Fcp Force of charge pump

16 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

P100594

270

180

CCW

Technical Information

Series 40 M46 Pumps

System Design Parameters

Maximum external shaft moments

Standard Bearing

Me/N•m [in·lbf ] 186 [1650]

External radial shaft load

Hydraulic Unit Life

Mounting Flange Loads

Hydraulic unit life is defined as the fatigue life expectancy of the hydraulic components. It is a function of speed and system pressure; however, system pressure is the dominant variable. High pressure, which results from high load, reduces expected hydraulic unit life.

System component selection is based on determination of the application maximum loads and speeds. Testing is recommended to secure duty cycle data in which to predict hydraulic unit life. Contact your Danfoss representative for assistance in unit life determination. If duty cycle data is not available, normal input power and maximum pump displacement can be used to determine an application pressure in which to predict life.

M46 pumps will meet most application hydraulic unit life expectancies if applied within the parameters specified in this manual and chosen considering the guidelines within Danfoss publication Selection of Driveline Components BLN-9885. For more detailed information on hydraulic unit life, see Danfoss publication Pressure and Speed Limits BLN-9884.

Shock load moment is the result of an instantaneous jolt to the system. Continuous load moments are generated by the typical vibratory movement of the application. Avoid excessive loading of the mounting flange such as adding tandem mounted auxiliary pumps and/or subjecting pumps to high shock loads. Design pump applications to stay within the allowable shock load moment and allowable continuous load moment.

Use the following formulas to estimate overhung load moment for multiple pump mountings: MS = GS (W1L1 + W2L2 + ... +WnLn) MC = GC (W1L1 + W2L2 + ... +WnLn) Refer to the Installation Drawings section to find pump length (L). Refer to the table Technical

Specifications in the Specifications section, to find pump weight (W). An exact measure of W will depend on the pump’s features.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 17

Mounting flange

CG Pump 1

CG Pump 2

P100 596E

Technical Information

Series 40 M46 Pumps

System Design Parameters

The tables below show allowable overhung load moment values. If system parameters exceed these values add additional pump support.

Estimated maximum and continuous acceleration factors for some typical Series 40 applications are shown. Applications which experience extreme resonant vibrations may require additional pump support. Typical continuous (vibratory) values can vary significantly due to changes in engine and pump configuration and mounting methods.

Overhung loading parameters

Shock load moment Continuous load moment Maximum shock acceleration (Gs) Continuous (vibratory) acceleration (Gs) Weight of nth pump Distance from mounting flange to center of gravity of nth pump

Allowable overhung parameters

Frame size Continuous load moment (Mc) 107 cycles

N•m [in·lbf]

M46 PV 517 [4600] 832 [7400] M46 PT 517 [4600] 754 [6700]

Shock load moment (Ms) 103 cycles N•m [in·lbf]

Shaft loading parameters

The illustration shows a tandem plus a single pump.

G-factors for sample applications

Application Continuous (vibratory)

acceleration (Gc)

Skid steer loader 4 10 Trencher

(rubber tires) Asphalt paver 2 6 Windrower 2 5 Aerial lift 1.5 4 Turf care vehicle 1.5 4 Vibratory roller 6 10 * Applications which experience extreme resonant vibrations require addition pump support.

3 8

Maximum (shock) acceleration (Gs)

18 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Technical Information

Series 40 M46 Pumps

System Design Parameters

Shaft Torques

Shaft selection

Base shaft selection on a review of the maximum torque required by the application and the maximum torque available from the prime mover. Application duty cycle and continuous torque rating of the prime mover are the main variable to consider when selecting a shaft.

Shaft torque and spline lubrication

The rated torque is a measure of tooth wear and is the torque level at which a normal spline life of 1 x 107 shaft revolutions can be expected. The rated torque presumes a regularly maintained minimum level of lubrication via a moly-disulfide grease in order to reduce the coefficient of friction and to restrict the presence of oxygen at the spline interface. It is also assumed that the mating spline has a minimum hardness of Rc 55 and full spline depth. The rated torque is proportional to the minimum active spline length.

However, a spline running in oil-flooded environment provides superior oxygen restriction in addition to contaminant flushing. The rated torque of a flooded spline can increase to that of the maximum published rating. A flooded spline would be indicative of a pump driven by a pump drive or plugged into an auxiliary pad of a pump.

Maximum torque ratings are based on torsional fatigue strength considering 1 x 105 full load reversing cycles.

Maintaining a spline engagement at least equal to the pitch diameter will also maximize spline life. Spline engagements of less than ¾ pitch diameter are subject to high contact stress and spline fretting.

Shaft torque for tapered shafts

The rated torque is based on the contact pressure between the shaft and hub surfaces with poor contact areas. With increased quality of the contact areas, the contact pressure between shaft and hub is increased, allowing higher torque to be transmitted.

A key is intended as an installation aid only. Any torque carried by the key as a result of poor contact area or mis-alignment will limit the torque carrying capability of the shaft significantly.

Maximum torque rating is based on an ideal contact area of 100% and the retaining nut properly torqued. This allows for the highest contact pressure between the shaft and the mating hub.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 19

C D E F G H J L N

T Z

Product Frame

Type

MPV 046

Technical Information

Series 40 M46 Pumps

Model Code - Single Pumps

Single Pumps

C Swashplate

Description Code Remarks

Standard B

D - Seal Group

Description Code Remarks

Seal group for MDC A Must select an MDC control Seal group for EDC/HDC/FNR B Must select an EDC/HDC/FNR control

E - Input Shaft/Auxiliary Spline

Description Code Remarks

13T 16/32 Spline / None A Requires S: None aux.. pad 13T 16/32 Spline / 9T 16/32 SplineR B Requires S: SAE-A aux.. pad 13T 16/32 Spline / 11T 16/32 Spline L Requires S: SAE-A aux.. pad 13T 16/32 Spline / 13T 16/32 Spline D Requires S: SAE-B aux.. pad 15T 16/32 Spline / None G Requires S: None aux.. pad 15T 16/32 Spline / 9T 16/32 Spline H Requires S: SAE-A aux.. pad 15T 16/32 Spline / 11T 16/32 Spline J Requires S: SAE-A aux.. pad 15T 16/32 Spline / 13T 16/32 Spline K Requires S: SAE-B aux.. pad Tapered, 1 inch dia., 1.5 in/foot, square key/9T 16/32 Spline P Requires S: SAE-A aux.. pad. Includes key and nut Tapered, 1 inch dia., 1.5 in/foot, square key/ 13T 16/32 Spline S Requires S: SAE-B aux.. pad. Includes key. Nut is customer supplied Straight key, 1 inch diamater / None V Requires S: None aux.. pad. Includes key. Straight key, 1 inch diameter / 9T 16/32 Spline W Requires S: SAE-A aux.. pad, includes key.

F - Rotation and valve plate

Description Code Remarks

CW, Quiet (Standard) S CP15; 3 deg. index. Requires charge pressure > 19.5 bar. CCW, Quiet (Standard) T CP15; 3 deg. index. Requires charge pressure > 19.5 bar.

G - Charge pump

Description Code Remarks

None A Charge relief set at 19 l/min, external supply

13.9 cc [0.85 in./cu] B Charge relief set at 1800 rpm

20 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Technical Information

Series 40 M46 Pumps

Model Code - Single Pumps

H - Charge pressure

Description Code Remarks

19.5 bar B

21.5 bar J

25.0 bar S EDC/HDC controls calibrated at 20.7 bar charge

J - Filtration

Description Code Remarks

Suction, with charge pump AA Requires G: with charge pump Remote pressure, with charge pump BA Requires G: with charge pump Remote (external) pressure , without charge pump BC Requires G: no charge pump Suction, with charge pump (HC EDC housing) HA requires G: with charge pump, N: with HC EDC Remote pressure with charge pump(HC EDC housing) HB requires G: with charge pump, N: with HC EDC Remote (external) pressure, without charge pump (HC EDC

housing)

HC requires G: no charge pump, N: with HC EDC

K - Displacement limiters

Description Code Remarks

Full displacement, 46 cc/rev [2.8 cu. in./rev] A 46 cc/rev [2.8 cu. in./rev] with adj. limiter, side #2 only,

centered side #2

L - Bypass valve

Description Code Bypass valve A

M - System pressure protection, A and B ports

Port protection

Plug type Letter Port A Port B Standard B Relief/Check Relief/Check

Second and Third Letter M 140 bar B 175 bar C 100 bar D 210 bar E 230 bar F 250 bar G 280 bar H 300 bar R 325 bar J 345 bar

Contact your Danfoss representative for configurations or pressures not shown.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 21

Technical Information

Series 40 M46 Pumps

Model Code - Single Pumps

N - Control type

Description Code Remarks

MDC handle with (2) 10 mm diameter holes, standard spring AB Recommend AW with metered spool MDC with (3) 10 mm diameter holes, standard spring AC Recommend AK with metered spool MDC with (3) 10 mm diameter holes, U shaped, standard

spring, metered spool MDC handle with (2) 10 mm diameter holes, standard spring,

metered spool MDC heavy duty handle with (4) 10 mm diameter holes, heavy

spring, metered spool HDC 1.3-11.7 bar BA 19-170 psi HDC 3.0-13.8 bar BB 44-200 psi HDC 4.8-15.2 bar BC 70-220 psi EDC dual coil, oil filled, Packard connector, 4-pin, 23-132 mA CE EDC dual coil, oil filled, MS connector, 4-pin, 23-132 mA CG EDC dual coil, oil filled, Deutsch connector, 4-pin, 23-132 mA CN FNR 12 volt, DIN 43650 connector DA FNR 24 volt, DIN 43650 connector DB EDC, high current, 12 volt, Deutsch connector, 2-pin HA EDC, high current, 24 volt, Deutsch connector, 2-pin HB

GB P; handle position to be B

P - Handle position

Description Code Remarks

Not applicable (EDC, HDC, FNR) A Both, up and down B N: MDC to include heavy duty 4-hole handle. Handle is symmetric

Down (MDC) D 2, or 3 hole handles only. Handle oriented away from suction port. Up (MDC) U 2, or 3 hole handles only. Handle oriented towards from suction

over spool

port.

R - Control orifice (contact factory for orifice options not shown)

MDC

Supply Drain (Supply and drain

F - None F - None A - 0.031 inch A - 0.031 inch B - 0.036 inch B - 0.036 inch C - 0.041 inch D - 0.041 inch D - 0.046 inch

EDC/HDC/FNR - Servo A and B

Servo A&B GG - 0.055 inch HH 0.037 inch JJ None

orifice chosen independently)

22 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Technical Information

Series 40 M46 Pumps

Model Code - Single Pumps

HC EDC - Servo A and B

Servo A&B HA - 0.046 inch HB 0.055 inch HC 0.037 inch HD 0.024 inch HE None

S - Auxiliary mounting flange

Description Code Remarks

SAE A, side #2 lift bracket location A E: Shaft to include 9T or 11T aux.. spline SAE B, side #2 lift bracket location B E: Shaft to include 13T aux.. spline None, side #2 lift bracket location C E: Shaft to include no aux.. pad

T - Special hardrare

Description Code Remarks

Black paint, Danfoss tag, Layout A NNN High capacity shaft bearing, black paint, Danfoss tag, Layout A NNR

Z - Special features, Non hardware

Description Code Remarks

None ***

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 23

C D L N P R

T Z

K M

Front Section

Rear Section

Y Z

Q D

Product Frame Type

M P

T 046

E F G H

Technical Information

Series 40 M46 Pumps

Model Code - Tandem Pumps

Tandem Pumps

E - Input Shaft

Description Code Remarks

15T 16/32 Spline A Requires S: None aux.. pad 19T 16/32 Spline B Requires S: SAE-B aux.. pad Tapered, 1 inch dia., 1.5 in/foot, square key without thru hole H Includes key and nut. Straight key, 1 inch diamater D Includes key.

F - Rotation and valve plate

Description Code Remarks

CW, without charge pump. Quiet (Standard) S CP15; 3 deg. index. Requires charge pressure > 19.5 bar. CCW, without charge pump. Quiet (Standard) T CP15; 3 deg. index. Requires charge pressure > 19.5 bar. CW, with 22.9 cc charge pump. Quiet (Standard) V CP15; 3 deg. index. Requires charge pressure > 19.5 bar. CCW, with 22.9 cc charge pump. Quiet (Standard) Z CP15; 3 deg. index. Requires charge pressure > 19.5 bar.

G - Charge pump

Description Code Remarks

None A Charge relief set at 38 l/min, external supply

22.9 cc [1.4 in./cu] C Charge relief set at 1800 rpm. Filtration and rotation must include charge pump

H - Charge pressure

Description Code Remarks

19.5 bar B

21.5 bar J

25.0 bar S EDC/HDC controls calibrated at 20.7 bar charge

J - Filtration

Description Code Remarks

Suction, with charge pump AA Requires a charge pump Remote pressure, with charge pump BA Requires a charge pump Remote (external) pressure, without charge pump BC Requires no charge pump

24 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Technical Information

Series 40 M46 Pumps

Model Code - Tandem Pumps

C - Swashplate group, front pump/Q - Swashplate group, rear pump

Description Code Remarks

Balanced B

D - Seal Group

Description Code Remarks

Seal group for MDC - Front pump A Must select an MDC control Seal group for EDC/HDC/FNR - Front pump B Must select an EDC/HDC/FNR control Seal group for MDC - Rear pump C Must select an MDC control Seal group for EDC/HDC/FNR - Rear pump D Must select an EDC/HDC/FNR control

K - Displacement limiters, front pump, U- Displacement limiters, rear pump

Description Code Remarks

Full displacement, 46 cc/rev [2.8 cu. in./rev] A 46 cc/rev [2.8 cu. in./rev] with adj. limiter, side #2 only,

centered side #2

L/X - Bypass valve

Description Code Bypass valve A

M - System pressure protection, A and B ports V - System pressure protection, rear pump, A and B ports

Port protection

Plug type First Letter Port A Port B Standard B Relief/Check Relief/Check

Second and Third Letter M 140 bar B 175 bar C 100 bar D 210 bar E 230 bar F 250 bar G 280 bar H 300 bar R 325 bar J 345 bar

Contact your Danfoss representative for configurations or pressures not shown.

N - Control type, front pump /Y - Control type, rear pump

Description Code Remarks

spring, metered spool

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 25

Technical Information

Series 40 M46 Pumps

Model Code - Tandem Pumps

N - Control type, front pump /Y - Control type, rear pump (continued)

Description Code Remarks

MDC handle with (2) 10 mm diameter holes, standard spring, metered spool

MDC heavy duty handle with (4) 10 mm diameter holes, heavy spring, metered spool

HDC 1.3-11.7 bar BA 19-170 psi HDC 3.0-13.8 bar BB 44-200 psi HDC 4.8-15.2 bar BC 70-220 psi EDC dual coil, oil filled, Packard connector, 4-pin, 23-132 mA CE EDC dual coil, oil filled, MS connector, 4-pin, 23-132 mA CG EDC dual coil, oil filled, Deutsch connector, 4-pin, 23-132 mA CN FNR 12 volt, DIN 43650 connector DA FNR 24 volt, DIN 43650 connector DB

P/Z - Handle position

Description Code Remarks

Not applicable (EDC, HDC, FNR) A EDC, HDC, FNR only Both, up and down B N: MDC to include heavy duty 4-hole handle. Handle is symmetric

Down (MDC) D 2, or 3 hole handles only. Handle oriented away from suction port. Up (MDC) U 2, or 3 hole handles only. Handle oriented towards from suction

GB P; handle position to be B

over spool

port.

R - Control orifice, front pump, W- Control orifice, rear pump

MDC

Supply Drain (Supply and

F - None F - None A - 0.031 inch A - 0.031 inch B - 0.036 inch B - 0.036 inch C - 0.041 inch D - 0.041 inch D - 0.046 inch

EDC/HDC/FNR - Servo A and B

Servo A&B GG - 0.055 inch HH 0.037 inch JJ None

S - Auxiliary mounting flange and coupling

Description Code Remarks

None C SAE A, 9 tooth 16/32 spline A

drain orifice chosen independently)

26 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Technical Information

Series 40 M46 Pumps

Model Code - Tandem Pumps

S - Auxiliary mounting flange and coupling (continued)

Description Code Remarks

SAE A, 11 tooth 16/32 spline D SAE B, 11 tooth 16/32 spline B

T - Special hardrare

Description Code Remarks

Black paint, Danfoss tag, Layout A NNN High capacity shaft bearing, black paint, Danfoss tag, Layout A NNR

Z - Special features, Non hardware

Description Code Remarks

None ***

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 27

69.6 [2.74]

Coupling must not

protrude beyond

this surface

2.85 [0.112] max.

6.35 [0.250] Sq. key

44.4 [1.75] long

0.38 [0.015] min. R on edges

25.4 [1.00] dia.

7.4 [0.29]

Mounting flange

(ref.)

P104415

3/4-16 UNF-2B thd.

42.4 [1.67]

1.50 taper per

foot

SAE standard J501

25.4 [1.000] nominal shaft dia.

26.9

[1.06]

22.2 [0.875] gauge dia.

33.3 [1.311] Gauge Dim.

Coupling must not

protrude beyond

36.3 [1.44] max.

Mounting flange

(ref.)

12.7 [0.50]

Customer supplied nut. Torque nut to 149 to 190 Nm [110 to 140 Lbf •f

t ] Thds. to be cleaned and

lubricated

P104417

6.35 [0.250] Sq. key

19.05 [0.75] long

0.38 [0.015] min. R on edges

2.84 [0.112] max.

Technical Information

Series 40 M46 Pumps

Options

Shaft options

Recommended mating splines for Series 40 splined output shafts should be in accordance with ANSIB 92.1 Class 5. Danfoss external splines are modified Class 5 Fillet Root Side Fit. The external splined

Major Diameter and Circular Tooth Thickness dimensions are reduced in order to assure a clearance fit with the mating spline. Other shaft options may exist. Contact your Danfoss representative for availability.

Single pumps

Code Description Maximum torque

rating Nm [lbf in]

V, W Ø 25.4 mm [1.000 in]

362 [3200] Straight keyed Shipped with key

P, S Ø 25.4 mm [1.000 in]

497 [4400] 1:8 taper (SAE J501) No thru hole Shipped with key only

Drawing

28 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

W pitch dia. Y teeth, 16/32 pitch

30° pressure angle fillet root side fit per ANSI B92.1-1970 class 5 also mates with flat root side fit

7.4 [0.29]

Coupling must not protrude beyond this surface

Mounting flange

(ref.)

P104416

Technical Information

Series 40 M46 Pumps

Options

Code Description Maximum torque rating

Nm [lbf in]

A, B, L, D 13-tooth 16/32 pitch (ANSI

226 [2000] 124 [1100]

B92.1 1970 - Class 5)

G, H, J, K 15-tooth 16/32 pitch (ANSI

362 [3200] 153 [1350]

B92.1 1970 - Class 5)

Shaft options Length Shaft

diameter

S T U V W Y A, B, D, L 32.9 [1.297] 20.3 [0.80] 16.26 [0.64] 21.72 [0.8550] 20.64 [0.8125] 13 G, H, J, K 37.7 [1.485] 22.3 [0.88] 23.4 [0.92] 24.89 [0.9800] 23.81 [0.9375] 15

Other shaft options may exist. Contact your Danfoss representative for availability and for specific installation drawings.

Rated torque Nm [lbf in

Full spline Major

Drawing

diameter

Pitch diameter

No. teeth

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 29

69.47 [2.735]

Coupling must not

protrude beyond

this surface

6.35 [0.250] sq. key

44.45 [1.75] long

0.38 [0.015] min. R. on edges

25.4 [1.00] dia.

7.47 [0.294]

Mounting flange

(ref.)

P104412

3/4-16 UNF-2 thd.

42.8 [1.685]

1.50 taper per foot per SAE standard J501

25.4 [1.000] Nominal shaft dia.

26.9

[1.06]

22.2 [0.875] Gauge dia.

33.3 [1.311] gauge dim.

Coupling must not

protrude beyond

25.4 [1.000] max.

Mounting flange

(ref.)

P104414

6.35 [0.250] Sq. key

19.05 [0.75] long

0.38 [0.015] min. R on edges

2.84 [0.112] max.

1 inch Hex nut torque to 149 to 190 Nm [110 to 140 Lbf •f

t.]

Threads to be

cleaned and lubricated

W pitch dia. Y teeth, 16/32 pitch

30° pressure angle fillet root side fit per ANSI B92.1-1970 class 5 also mates with flat root side fit

7.4 [0.29]

Coupling must not protrude beyond this surface

Mounting flange

(ref.)

P104416

Technical Information

Series 40 M46 Pumps

Options

Tandem pumps

Code Description Maximum torque

rating Nm [lbf in]

D Ø 25.4 mm [1.000 in]

362 [3200] Straight keyed Shipped with key

H Ø 25.4 mm [1.000 in]

497 [4400] 1:8 taper (SAE J501) No thru hole Shipped with key only

Drawing

Code Description Maximum torque

rating Nm [lbf in]

Rated torque

Drawing

Nm [lbf in

A 15-tooth 16/32

pitch (ANSI B92.1

362 [3200] 153

[1350]

1970 - Class 5)

B 19-tooth 16/32

pitch (ANSI B92.1

734 [6500] 305

[2700]

1970 - Class 5)

30 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

P100589

Technical Information

Series 40 M46 Pumps

Options

Charge Pump

Shaft options Length Shaft

diameter

S T U V W Y A 37.7 [1.485] 22.3 [0.88] 23.4 [0.92] 24.89 [0.9800] 20.638 [0.9375] 15 B 37.7 [1.497] 28.7 [1.13] 24.1 [0.95] 31.24 [1.230] 30.163 [1.1875] 19

Full spline Major

diameter

Pitch diameter

No. teeth

Other shaft options may exist. Contact your Danfoss representative for availability and for specific installation drawings.

Charge flow is required on all M46 units to make up for internal leakage, maintain positive pressure in the main circuit, provide flow for cooling, replace any leakage losses from external valving or auxiliary systems, and to provide flow and pressure for the control system.

Maintain minimum charge pressure under all conditions of operation to prevent damage to the transmission.

Charge pump

Many factors influence the charge flow requirements and the resulting charge pump size selection. These factors include system pressure, pump speed, pump swashplate angle, type of fluid, temperature, size of heat exchanger, length and size of hydraulic lines, control response characteristics, auxiliary flow requirements, hydraulic motor type, etc. Charge pump displacement should be equal to or greater than 10% of the total displacement of all units in the system.

The total charge flow requirement is the sum of the charge flow requirements of each of the components in the system. Use the information provided on the following pages to make a charge pump selection for a given application.

System features and conditions that may invalidate the 10% of displacement rule include (but are not limited to):

•

Operation at low input speeds (below 1500 RPM)

•

Shock loading

•

Excessively long system lines

•

Auxiliary flow requirements

•

Use of low speed high torque motors

If a charge pump of sufficient displacement to meet the 10% of displacement rule is not available or if any of the above conditions exist which could invalidate the 10% rule, contact your Danfoss representative. A charge pump sizing worksheet is available in Selection of Driveline Components BLN-9885.

When an integral charge pump is not used, an external charge supply is required to ensure adequate charge pressure and cooling.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 31

l/min

US Gal/min

0 1000 2000 3000 4000

Speed min (rpm)

M46 PT

M46 PV

T101302

-1

0 1000 2000 3000 4000

hpkW

Speed min (rpm)

M46PT

M46PV

T101303

-1

Technical Information

Series 40 M46 Pumps

Options

Charge Pump Output Flow

Flow at 19.5 bar charge relief setting, 70°C [160°F] inlet

Charge Pump Power Requirements

Power at 19.5 bar charge relief setting, 70°C [160°F] inlet

Higher charge pressure will influence charge flow and power.

Charge Relief Valve

An integral charge pressure relief valve provides a relief outlet for charge flow. This valve, in effect, sets charge pressure. Flow through the valve is ported to case.

The M46 PV/PT uses a cone-style poppet valve which dumps hydraulic fluid to the front pump.

32 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

The nominal charge relief setting is referenced to case pressure. It is factory set at 1800 min-1 (rpm) with the pump in neutral position. A proper charge relief setting takes into account input speeds and control requirements.

The charge pressure setting for pumps without an internal charge pump is set with an externally supplied charge flow of 19 l/min [5 US gal/min] on pumps and 38 l/min [10 US gal/min] on tandem pumps. These units must have adequate charge flow supplied to the charge inlet in order to maintain charge pressure at all times.

Incorrect charge pressure settings may result in the inability to build required system pressure and/or inadequate loop flushing flows. Ensure correct charge pressure under all conditions.

M46 PV

Charge Relief Valve

P100591

Technical Information

Series 40 M46 Pumps

Options

The charge relief valve is factory set. If necessary, it can be field adjusted with shims.

Charge Relief Valve Specs

M46 Type Cone poppet valve

Available Setting 19.5-26.2 bar [285-380 psi] Adjustment Via shims inside of valve cartridge* Rise Rate Adjustment 2.3 bar [33 psi]/mm

Performance 1.8 bar [26 psi]/10 lpm (Approx.)

*Shimming offers adjustment over a limited range. A spring change may be required to reach a higher setting.

Contact your Danfoss representative for further information regarding charge pressure relief valve options.

Charge relief valve location

High Pressure Relief Valve (HPRV) and Charge Check

All M46 pumps are equipped with a combination high pressure relief and charge check valve. The highpressure relief function is a dissipative (with heat generation) pressure control valve for the purpose of limiting excessive system pressures. The charge check function acts to replenish the low-pressure side of the working loop with charge oil. Each side of the transmission loop has a dedicated HPRV valve that is non-adjustable with a factory set pressure. When system pressure exceeds the factory setting of the valve, oil is passed from the high pressure loop, into the charge gallery, and into the low pressure loop via the charge check.

High pressure relief valves are a differential pressure valve referencing high system to charge (low system). The numeric model code represents the differential pressure setting, in bar. The model code allows for different pressure settings to be specified at each system port.

HPRV´s are factory set at a low flow condition. Any application or operating condition which leads to elevated HPRV flow will cause a pressure rise with flow above a valve setting. Consult factory for application review. Excessive operation of the HPRV will generate heat in the closed loop and may cause damage to the internal components of the pump.

CAUTION

High pressure relief valves are intended for transient overpressure protection and are not intended for continuous pressure control. Flow over relief valves for extended periods of time may result in severe heat build up. High flows over relief valves may result in pressure levels exceeding the nominal valve setting and potential damage to system components.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 33

Bypass valve

High pressure relief valve

P100590

Technical Information

Series 40 M46 Pumps

Options

Check/high pressure relief valve specs

Type Setting Option

High pressure relief valve locations

Cartridge-style poppet valve

140-345 bar (2030-5000 psi)

Check only - no relief valve

Bypass Function

Displacement Limiters

All M46 pumps are equipped with a loop bypass valve that connects the A and B sides of the working loop. The bypass function allows a machine to be moved without rotating the pump shaft or prime mover. To open the bypass valve turn it counterclockwise 2 full turns. Do not open past 2 full turns. Use a 5/8 inch hex wrench to open the valve. To return to normal operation, close the valve and torque to 20 Nm [15 ft•lbs]. Do not over torque the valve.

CAUTION

Do not move the machine faster than 20% of maximum speed or for more than 3 minutes. Towing faster or longer than described may result in damage to the drive motor(s). To return to normal operation, carefully close and torque the bypass valve.

M46 single or tandem units are designed with optional non-adjustable mechanical displacement (stroke) limiters located in the servo piston. You can limit maximum displacement of the pump to a certain percent of its maximum displacement. These displacement limiters are fixed physical stops inside the pump, are not externally adjustable, and limit the pump symmetrically across both sides. Contact your Danfoss representative for a list of available settings.

It is also possible to configure an M46 pump with an externally adjustable displacement limiter screw on side #2 only. The screw is located on the side of the servo piston opposite the neutral adjustment screw.

Warning

Unintended vehicle or machine movement hazard

Take care in adjusting displacement limiters to avoid an undesirable condition of output flow or speed. Re-torque the sealing lock nut after every adjustment to prevent an unexpected change in output conditions and to prevent external leakage during pump operation.

One full revolution of the adjustment screw produces a change in displacement of approximately 4.4 cm3/rev [0.27 in3/rev]. Full unit displacement is attained with the adjustment screw at its maximum extension from servo cover. All pumps are shipped with the limiter set for maximum pump displacement.

34 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Neutral adjustment screw

Fixed

displacement

limiter

Adjustable

displacement

limiter screw

P100 592E

Technical Information

Series 40 M46 Pumps

Options

M46 Displacement limiter (side #2)

Auxiliary Mounting Pads and Auxiliary Pumps

Auxiliary mounting pads are available on all pumps. A sealed shipping cover is included as standard equipment on all mounting pads.

An O-ring seals the auxiliary pump mounting flange to the pad. The drive spline is lubricated (flooded) with oil from the main pump case.

Spline specifications and torque ratings are shown in the accompanying table.

•

All auxiliary mounting pads meet SAE J744 specifications

•

Do not exceed the maximum pump input shaft rating shown in the Shaft availability and torque ratings table in the Shaft Options section

•

Applications subject to severe vibratory or high G loading require an additional structural support. This is necessary to prevent leaks and possible mounting flange damage. Refer to Mounting flange loads in the System Design Parameters section, for additional information

Auxiliary mounting pad specs

Internal spline size Pad size Maximum Torque Rating

Nm [in lbf] 9T 16/32P SAE A 107 [950] 11T 16/32P SAE A 147 [1300] 13T 16/32P SAE B 248 [2200]

The drawing and table below show the dimensions of the auxiliary pump mounting flanges and shafts. Auxiliary pump mounting flanges and shafts with the dimensions noted are compatible with the auxiliary mounting pads on the Series 40 pumps.

Auxiliary pump mating dimensions mm [in.]

Pad size P B C D E F

SAE A 82.55 [32.50] 6.35 [0.250] 12.70 [0.500] 58.2 [2.29] 15.0 [0.59] 13.5 [0.53] SAE B 101.60 [4.000] 9.65 [0.380] 15.2 [0.60] 53.1 [2.09] 17.5 [0.69] 14.2 [0.56]

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 35

P Dia.

max.

Mounting flange

(ref.

)

max.

With

undercut

Without

undercut

max.

0.8 [0.03] max. R

2.3 [0.090] recommended cutter clearance

Coupling

F min spline engagement for full torque rating

P100 636E

Technical Information

Series 40 M46 Pumps

Options

Manual Displacement Control (MDC) - Options AB, AC, AK, AW, and GB

The Manual Displacement Control (MDC) converts a mechanical input signal to a hydraulic signal with a spring centered 4-way servo valve, and ports hydraulic pressure to either side of a double acting servo piston. The MDC provides output flow to the servo piston in proportion to the angular position of the control handle. The servo piston tilts the cradle swashplate, thus varying the pump’s displacement from full displacement in one direction to full displacement in the opposite direction.

Due to normal operating force changes, the swashplate tends to drift from the position preset by the machine operator. Drift, sensed by the feedback linkage system connecting the swashplate to the control valve, activates the valve and supplies pressure to the servo piston, maintaining the swashplate in its preset position.

A metered control porting spool is available that provides improved controllability. The metered spool has machined notches that feather the porting of oil into and out-of the double acting servo piston when very small changes in control input are commanded. Nevertheless, the metered spool remains a high response control when normal input changes open the porting to a full open position, porting maximum flow to the servo cylinder. In neutral, these notches allow a small amount of pressure into both ends of the servo, elevating the neutral servo pressure slightly above case. This servo piston preloading improves the swashplate control coming out of neutral.

For a list of available control options, refer to the Model Code section.

Features:

•

The MDC is a high gain control: with only a small movement of the control handle (input signal) the control valve moves to a full open position porting maximum flow to the servo cylinder. This is a high response control system with low input forces.

•

Mechanical feedback senses swashplate reactions to load.

•

Precision parts provide repeatable, accurate displacement settings with a given input signal.

•

The servo piston is coupled to a spring centering mechanism.

Benefits:

36 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

CCW

20°20°

P100 598

B N A

P100587

Technical Information

Series 40 M46 Pumps

Options

•

Simple-low cost design.

•

Pump output is maintained regardless of load.

•

Pump will return to neutral after prime mover shuts down.

•

Pump returns to neutral if external control linkage becomes disconnected from the control handle or if there is a loss of charge pressure.

Control Handles and Springs

The standard MDC encompasses a three hole control handle with a standard return spring. This control is available with metered (standard) or non-metered porting spool. Optional two hole or four hole (heavy duty) control handles are available. The two hole handle is available with metered or non-metered spool and only available with a standard return spring. The four hole heavy duty handle is only available with metered spool and heavy return spring.

Three hole handle shown (in up position)

MDC Hydraulic schematic

Pump flow direction with MDC control

Pump flow direction with MDC control CW CCW

Single or Front Tandem

Rear Tandem Handle Rotation CW CCW CW CCW

High Servo Gauge Port M4 M5 M4 M5 Refer to pump installation drawing for port locations.

Handle Rotation CW CCW CW CCW Port A Flow Out In In Out Port B Flow In Out Out In

Port C Flow In Out Out In Port D Flow Out In In Out

All M46 pumps have a 40 mesh [0.4 mm (0.015 inch)] servicable screen located in the control supply port.

Response Time

The time required for the pump output flow to change from neutral to full flow (acceleration) or full flow to neutral (deceleration) is a function of the size of the supply orifice in the control inlet passage and the size of the drain orifice in the control sleeve.

A range of orifice sizes is available to assist in matching the rate of swashplate response to the acceleration and deceleration requirements of the application. The table at right shows some sample response times under certain conditions. (These figures assume 1775 min-1 (rpm), 140 bar [2000 psi] system pressure, and 20 bar [290 psi] charge pressure.) Vehicle testing is required to determine the proper orifice sizes for the desired response.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 37

100%

Handle rotation

CCW

Handle rotation

displacemen

25 Maximum

T100308

Technical Information

Series 40 M46 Pumps

Options

MDC Response time

Orifice diameter* mm [in] Average response time [seconds]

Supply Drain Acceleration Deceleration

0.9 [0.036] 0.8 [0.031] 2.5 1.9

0.9 [0.036] 1.2 [0.046] 2.0 1.4

1.4 [0.054] 1.2 [0.046] 1.2 0.9 None None 0.5 0.4 *Contact Danfoss for special orifice combinations.

External control handle torque requirements

Standard spring Heavy duty spring

Rotation of handle to reach full displacement 20 degrees 20 degrees Maximum handle rotation 25 degrees 25 degrees Neutral deadband ± 1.5 degrees ± 0.8 degrees Torque needed to begin handle rotation (1

degree) Torque required to reach full stroke (20

degrees) Maximum allowable handle torque 17 N•m [150 in•lbf ] 17 N•m [150 in•lbf ]

1.2 Nm [11 in•lbf ] 2.5 Nm [22 in•lbf ]

1.7 N•m [15 in•lbf ] 3.4 N•m [30 in•lbf ]

Handle direction

The MDC handle can be configured in either the up or down or both (symmetric) positions. The up position is shown on the previous page. The down position is oriented 180° of the up position.

Pump displacement vs control lever rotation

MDC signal required for swashplate position

Swashplate position (refer to above chart)

Hydraulic Displacement - Options BA, BB and BC

38 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Handle configuration Swashplate movement begins (point

A) degrees Metered 0.8° 20° Non-metered 1.5° 20°

The Hydraulic Displacement Control (HDC) is a two stage design which uses a hydraulic input signal to operate a spring centered 4-way servo valve, which ports hydraulic pressure to either side of a double

Full displacement reached (point B) degrees

Port X2

Port X1

P100599

P104367

Technical Information

Series 40 M46 Pumps

Options

acting servo piston. The servo piston tilts the cradle swashplate, thus varying the pump’s displacement from full displacement in one direction to full displacement in the opposite direction.

The HDC provides output flow in proportion to a hydraulic command signal. This allows for remote control of the machine with a hydraulic pressure source rather than with mechanical linkage. With no command signal, the control returns to neutral position. The HDC is only available with a non-metered spool.

For a list of available control options, refer to the Model Code section.

Features:

•

The hydraulic displacement control is a high gain control: with only a small change in the input signal pressure level, the servo valve moves to a full open position, porting maximum flow to the servo cylinder.

•

Internal mechanical stops on the servo valve allow rapid changes in input signal pressure without damaging the control mechanism.

•

Precision parts provide repeatable, accurate displacement settings with a given input signal.

•

Both ends of the double-acting servo piston are drained to case when input signal pressure is not present. The servo piston is coupled to a spring centering mechanism.

Benefits:

•

Simple-low cost design.

•

Pump will return to neutral after prime mover shuts down.

•

Pump will return to neutral if external hydraulic input signal fails or if there is a loss of charge pressure.

All M46 pumps have a 40 mesh [0.4 mm (0.015 inch)] servicable screen located in the control supply port.

HDC on M46 PV

HDC Hydraulic schematic

Pump flow direction with HDC control

Input Shaft Rotationump flow direction with MDC control CW CCW

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 39

Single or Front Tandem

Rear Tandem Higher pressure into control port: X1 X2 X1 X2

High Servo Gauge Port M4 M5 M4 M5 Refer to pump installation drawing for port locations.

Higher pressure into control port: X1 X2 X1 X2 Port A Flow Out In In Out Port B Flow In Out Out In

Port C Flow In Out Out In Port D Flow Out In In Out

100%

Signal pressure

displacemen

-a

-b

T101310-

Technical Information

Series 40 M46 Pumps

Options

Response Time

Control input signal requirements

The standard command signal range required to stroke the pump between neutral and full stroke is 1.3 to 11.7 bar [19 to 170 psi] differential. The maximum command pressure must not exceed 27.5 bar [400 psi].

HDC options

The HDC can be tailored to respond to a higher signal pressure. Optional heavy spring packs are available that operate in the 3 to 14 bar [44 to 200 psi] range and the 5 to 15 bar [70 to 220 psi] range.

HDC Response time

Orifice diameter* mm [in] Average response time [seconds]

Acceleration Deceleration

0.9 [0.037] 0.8 [0.031] 1.6 1.3

1.4 [0.055] 1.2 [0.046] 0.9 0.7 None None 0.4 0.3 *Contact Danfoss for special orifice combinations.

Pump displacement vs control lever rotation

HDC signal required for swashplate position

Swashplate position (refer to above chart)

40 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

Configuration bar [psid] bar [psid] BA 1.3±0.5 [19±7] 11.7±1.1 [170±16] BB 3.0±0.7 [44±10] 13.8±1.4 [200±20] BC 4.8±0.7 [70±10] 15.2±1.4 [220±20]

Swashplate movement begins (point A) Full displacement reached (point B)

P100600

Technical Information

Series 40 M46 Pumps

Options

HDC Input specs

Maximum input pressure bar [psi] 27.5 [400]

Electrical Displacement Control- Options CE, CG, CM, and CN

The Electrical Displacement Control (EDC) is a three stage control similar to the HDC, but it uses an electrohydraulic Pressure Control Pilot (PCP) valve to control the pilot pressure. The PCP valve converts an electrical input signal to a hydraulic signal to operate a spring centered 4-way servo valve, which ports hydraulic pressure to either side of a double acting servo piston. The servo piston tilts the cradle swashplate, thus varying the pump’s displacement from full displacement in one direction to full displacement in the opposite direction.

The EDC provides output flow in proportion to a DC electrical command signal (current). This control is suited for applications where remote or automatic control of system function is required, or where closed loop feedback is needed. With no electrical command signal, the control returns to the neutral position. The EDC is only available with a nonmetered spool.

The M46 EDC is a current driven device designed for a DC signal. Use a PWM signal with a 100-200 Hz dither frequency for optimum control operation. Limit the amplitude of the PWM signal to 6 Vdc. For further assistance, contact your Danfoss representative.

Features:

•

The EDC is a high gain control: with only a small change in the input current, the servo valve moves to a full open position thus porting maximum flow to the servo cylinder.

•

Oil filled PCP valve case lengthens control life by preventing moisture ingression and dampening component vibrations.

•

Internal mechanical stops on the servo valve allow rapid changes in input signal voltages without damaging the control mechanism.

•

Precision parts provide repeatable accurate displacement settings with a given input signal.

•

Both ends of the double acting servo piston are drained to case when input signal current is not present. The servo piston is coupled to a spring centering mechanism.

Benefits:

•

Simple, low-cost design.

•

Pump will return to neutral after prime mover shuts down.

•

Pump will return to neutral if external electrical input signal fails or if there is a loss of charge pressure.

EDC on M46 PV

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 41

P104368

Technical Information

Series 40 M46 Pumps

Options

Pump flow direction with EDC control

Input Shaft Rotation

Positive signal to pin CW CCW

Single or Front Tandem

Rear Tandem Single coil or Dual coil in parallel

High Servo Gauge Port M4 M5 M4 M5 Refer to pump installation drawing for port locations.

Single coil or Dual coil in parallel (A&C common, B&D common)

Dual coil in series (B&C common) A D A D Port A Flow Out In In Out Port B Flow In Out Out In

(A&C common, B&D common) Dual coil in series (B&C common) A D D A Port C Flow In Out Out In Port D Flow Out In In Out

A or C B or D A or C B or D

All M46 pumps have a 40 mesh [0.4 mm (0.015 inch)] servicable screen located in the control supply port.

For a list of available control and connector options, refer to the Model Code section.

EDC Hydraulic Schematic

Response time

The time required for the pump output flow to change from neutral to full flow (acceleration) or full flow

42 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

to neutral (deceleration) is a function of the size of the orifices in the servo and supply passages. A range of orifice sizes is available to assist in matching the rate of swashplate response to the

acceleration and deceleration requirements of the application. The table below shows some sample

100%

Current in MA

displacemen

-a

-b

T101312

Technical Information

Series 40 M46 Pumps

Options

response times under certain conditions. (These figures assume 1775 min-1 (rpm), 140 bar [2000 psi] system pressure, and 20 bar [290 psi] charge pressure.) Test system response to determine the proper orifice selection for the desired response.

Control Input, Coils and Connectors

The standard EDC is a dual coil device with a silicone oil -filled case. It is available with a Packard WeatherPak, Deutsch DT or MS connector. It is possible to design a system that uses only one coil or use both coils in series or in parallel. Using both coils allows for the use of two command stations with the resulting command being the algebraic sum of the two signals. The Deutsch DT connector has an IP67 rating. The MS connector is IP66 rated, and the Packard Weather-Pak connector is IP65 rated.

Pump displacement vs electrical control

EDC Input Options

Coil configuration (Point a) mA (Point b) mA Pin Connections

Dual coil, using only one coil 23 ± 6 132 ± 18 A & B or C & D Dual coil, coils in series 11.5 ± 3 65 ± 9 A & D (C & B common) Dual coil, coils in parallel 23 ± 6 132 ± 18 AC & BD * Dual coil EDCs are production tested using two coils in parallel.

Dual coil EDC input specs

A-B coil C-D coil Coil resistance @24°C [75°F] 20 Ohms 16.5 Ohms Coil resistance @104°C [220°F] 24.7 Ohms 19.7 Ohms

Contact factory for other control options, such as: Single coil or low current controls and for other connector options.

EDC Response time

Orifice diameter* mm [in] Average response time [seconds]

Acceleration Deceleration

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 43

0.9 [0.037] 0.8 [0.031] 1.6 1.3

1.4 [0.055] 1.2 [0.046] 0.9 0.7 None 0.4 0.3 *Contact Danfoss for special orifice combinations.

For further information refer to Danfoss publication Electrical Displacement Control - MDT BLN-95-8988.

Mount M46 pumps with an EDC control so the control is on the top or the side.

P003 191

P003 479E

"0"

-b -a

100 %

Displacement

Current mA

Technical Information

Series 40 M46 Pumps

Options

High Current Electric Displacement Control - Options HA (12Vdc) and HB (24Vdc)

High Current EDC principle

The High Current Electrical Displacement Control (HC EDC) consists of a pair of proportional solenoids on each side of a three-position, four-way porting spool. The proportional solenoid applies a force input to the spool, which ports hydraulic pressure to either side of a double acting servo piston. Differential pressure across the servo piston rotates the swashplate, changing the pump‘s displacement from full displacement in one direction to full displacement in the opposite direction.

Under some circumstances, such as contamination, the control spool could stick and cause the pump to stay at some displacement.

A serviceable 125 μm screen is located in the supply line immediately before the control porting spool.

Pump displacement vs. control current

44 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

P108759

S M2

flow out B

1 2

P003 480

Technical Information

Series 40 M46 Pumps

Options

Schematic diagram

Control signal requirements

Control current

Voltage a* mA b mA Pin connections

12 V 640 1640 any order 24 V 330 820

Factory test current, for vehicle movement or application actuation expect higher or lower value.

Connector

Description Quantity Ordering number

Mating connector 1 Deutsch® DT06-2S Wedge lock 1 Deutsch® W2S Socket contact (16 and 18 AWG) 2 Deutsch® 0462-201-16141 Danfoss mating connector kit 1 K29657

Solenoid data

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 45

Voltage 12V 24V

Maximum current 1800 mA 920 mA Coil resistance @ 20 °C [70 °F] 3.66 Ω 14.20 Ω Coil resistance @ 80 °C [176 °F] 4.52 Ω 17.52 Ω PWM Range 70-200 Hz PWM Frequency (preferred)** 100 Hz

Technical Information

Series 40 M46 Pumps

Options

Solenoid data (continued)

Voltage 12V 24V

Inductance 33 mH 140 mH IP Rating (IEC 60 529) + DIN 40 050, part 9 IP 67 IP Rating (IEC 60 529) + DIN 40 050, part 9 with mating connector IP 69K

PWM signal required for optimum control performance.

Flow table

Shaft rotation CW CCW

Coil energized

Port A in out out in Port B out in in out Servo port pressurized M5 M4 M5 M4

For coil location see installation drawings.

C2 C1 C2 C1

Response times

A range of servo orifice options are available to assist in matching the rate of swashplate response to the application requirements (e.g. in the event of electrical failure). Software ramp or rate limiting should be used to control vehicle response in normal operation. The time required for the pump output flow to change from zero to full flow (acceleration) or full flow to zero (deceleration) is a net function of spool porting, orifices, and charge pressure. The table below shows some sample response times under certain conditions. These figures assume 1775 min-1 (rpm), 140 bar [2000 psi] system pressure, and 20 bar [290 psi] charge pressure. Testing should be conducted to verify the proper software and orifice selection for the desired response.

Software is envisioned as the means to control the swashplate response in normal operating conditions. Mechanical servo orifices are to be used only for fail-safe return to neutral in the event of an electrical failure.

Contact Danfoss technical representative for additional information regarding orifice options and response times.

Typical response times shown below at the following conditions:

Response times

HC EDC Response time

Orifice diameter* mm [in] Average response time [seconds]

Acceleration Deceleration

1.2 [0.046] 2.0 1.6 None 0.9 1.0

Contact Danfoss for additional orifice combinations.

Manual OverRide (MOR)

All high current controls are standard with Manual Over Ride (MOR), used for temporary actuation of the control to aid in diagnostics.

46 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

P003 204

P108758

Technical Information

Series 40 M46 Pumps

Options

Unintended MOR operation will cause the pump to go into stroke. The vehicle or device must always be in a safe condition (i.e. vehicle lifted off the ground) when using the MOR function. The MOR plunger has a 4 mm diameter and must be manually depressed to be engaged. Depressing the plunger mechanically moves the control spool which allows the pump to go on stroke. The MOR should be engaged anticipating a full stroke response from the pump.

Warning

An O-ring seal is used to seal the MOR plunger where initial actuation of the function will require a force of 45 N to engage the plunger. Additional actuations typically require less force to engage the MOR plunger. Proportional control of the pump using the MOR should not be expected.

Refer to the control flow table for the relationship of solenoid to direction of flow.

MOR Schematic diagram (EDC shown)

Three-position Electrical Control - Options DA and DB

The three-position Forward-Neutral-Reverse (FNR) is a two stage control that uses a solenoid operated 3position, 4-way valve to move pump displacement from neutral to maximum displacement in either direction.

When a solenoid is energized, charge pressure is directed to one end of the pump servo control cylinder, which results in the pump going to maximum displacement. The direction of pump output flow is determined by which solenoid is energized. (See the accompanying table)

Features and benefits

•

Electric control.

•

If voltage is lost, the control returns pump to neutral.

•

Simple, low-cost design.

•

Ideal for non-propel applications that do not require proportional control.

•

A manual override (MOR) option is available. It requires a 3 mm tool for engagement.

For a list of available control options, refer to the Model Code section.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 47

P100601

P104369

Technical Information

Series 40 M46 Pumps

Options

FNR Control on M46 PV

Pump flow direction with FNR control

Input Shaft Rotation CW CCW

Single or Front Tandem

Rear Tandem Solenoid energized: A B A B

High Servo Gauge Port M5 M4 M5 M4 Refer to pump installation drawing for solenoid and port locations.

Solenoid energized: A B A B Port A Flow In Out Out In Port B Flow Out In In Out

Port C Flow Out In In Out Port D Flow In Out Out In

All M46 pumps have a 40 mesh [0.4 mm (0.015 inch)] servicable screen located in the control supply port.

FNR Hydraulic schematic

48 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

1 2

Not connected

Voltage between terminals 1 and 2

DANFOSS

mating parts kit

Part No. K09129

Solenoid plug face for DIN 43650 connector

P109486

Pump displacement vs. electrical signal

"0"

Voltage VDC

Displacement

100 %

-b

FNR connector

Technical Information

Series 40 M46 Pumps

Options

Response time

The time required for the pump output flow to change from neutral to full flow (acceleration) or full flow to neutral (deceleration) is a function of the size of the orifices in the servo, supply and drain passages.

A range of orifice sizes is available to assist in matching the rate of swashplate response to the acceleration and deceleration requirements of the application. The table below shows some sample response times under certain conditions. (These figures assume 1775 min-1 (rpm), 140 bar [2000 psi] system pressure, and 20 bar [290 psi] charge pressure.) Test system response to determine the proper orifice selection for the desired response.

Control input signal requirements

The solenoids are available in versions for 12 or 24 Vdc. Maximum power consumption is 30 Watts. They are available with terminals for a DIN 43650 connector.

FNR Response time

Orifice diameter* mm [in] Average response time [seconds]

Acceleration Deceleration

0.9 [0.037] 0.8 [0.031]

1.4 [0.055] 1.2 [0.046] 0.9 0.7 None None 0.4 0.3 *Contact Danfoss for special orifice combinations.

1.6 1.3

FNR input specifications

Vdc 12 or 24 Max power 30 W Connectors DIN 43650

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 49

9/16 - 18

Charge Pressur

Gauge Port M3

9/16 - 18

System Pressure Gauge Port M2 (for port B)

Control Pressure Gauge Port

1/8-27 NPTF

(for MDC only)

Left side view (with MDC,

charge pump, and suction filtration)

9/16 - 18

System Pressure Gauge port M1 (f

or port A)

Relief Valve (optional relief valve) (for port A)

9/16 - 18

Servo Pressure Gage Port M4

Top view (with MDC, charge pump, and suction filtration)

Bottom view (with MDC and suction filtration)

Remote filtration with or without charge pump

7/8 - 14

To remote filter

(pressure filter

option)

7/8 - 14

From remote filter

(pressure filter option) or external charge supply E

(no charge pump option)

1-5/16 - 12

Port B

Valve

(optional relief valve)

(for port B)

9/16 - 18

Servo Pressure Gauge Port M5

1-1/16 - 12

Case Outlet L2

1-5/16 - 12

Port A

LEFT SIDE VIEW

P108401

Relief

Relief Valve

Charge Pressure

Inlet

Charge Pump

Case Outlet L1 1-1/16-12

Bypass

All ports are straight thread O-ring boss per ISO 11926-1 and SAE J1926/1

1-5/16-12

Technical Information

Series 40 M46 Pumps

Port Locations

Single Pump

50 | © Danfoss | March 2017 L1001029 | BC00000176en-US0209

9/16 - 18

Charge Pressure

Gauge Port M3

System Pressure

Gauge Port

Top view (with MDC, charge pump, and suction filtration)

Bottom view (with MDC and suction filtration)

7/8 - 14

To remote filter D

(pressure filter

option)

7/8 - 14

From remote filter E (pressure filter option) or charge pressure inlet E (no charge pump option)

1-1/16 - 12

Case Outlet L1

1-5/8 - 12

Charge Pump Inlet

Relief

Valve

(for Port D)

Relief

Valve

(for port A)

9/16 - 18

Servo Pressure Gauge Port M5

1-1/16 - 12

Case Outlet L2

System Port D 1-5/16 - 12

1-5/16 - 12

Port C

9/16 - 18

Ser

vo Pressure

Gauge Port M4 (front pump)

System Pressure

Gauge Port

(for port D)

9/16 - 18

System Pressur

Gauge Port

M1 rear

(for port C)

9/16 - 18

Servo Pressure

Gauge Port

9/16 - 18

Servo Pressure Gauge Port M5

1-5/16 - 12

Port A

Relief

Valve

(for port B)

System Pressure Gauge Port M2

Control Pressure Gauge Ports

1/8-27 NPTF (MDC only)

Left side view (with MDC,

charge pump, and suction filtration)

Relief Valve (for port C)

LEFT SIDE VIEW

P108402

9/16-18

9/16 - 18

1-5/16 - 12

Port B

(rear pump)

Charge Pressure Relief Valve

front pump (port A)

rear pump

(for port B)

front pump

rear pump

front pump

Bypass Front

Bypass Rear

1-1/16 - 12

Case Outlet L3

All ports are straight thread O-ring boss per ISO 11926-1 and SAE J1926/1

Technical Information

Series 40 M46 Pumps

Port Locations

Tandem Pump

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 51

3/8-16 thd.

20.3 [0.80] min. full thd. depth

(2) holes

1/2-13

thd.

27.17 [1.07] thd. depth (2) holes

SAE B Auxiliary mounting flange

Option B

73.03

[2.875]

146.05 [5.75]

10.7 min. [0.42]

1.50 [0.059]

20.64 [0.813] pitch dia. 30° pressure angle 13 teeth 16/32 pitch fillet root side fit

263.4

[10.37]

46.0 [1.81] min.

101.65 dia. [4.002]

1.0 max. R [0.04]

0.5 max. R [0.02]

O-ring seal required

ref. 94.97 [3.739] ID x

1.75 [0.070] dia. cross section

105.64

[4.159]

Mounting flange

(ref.)

SAE A Auxiliary mounting flange

Options A and D

53.19

[2.094]

106.38 [4.188]

P pitch dia. 30° pressure angle N teeth, 16/32 pitch fillet root side fit Per ANSI B92.1-1970 (see table)

7.4 min. [0.29]

0.5 max R [0.02]

1.0 max R [0.04]

82.6 dia. [3.252]

88.65 dia. [3.490]

O-ring seal required

ref. 82.22 [3.237]

2.62 [0.103] dia. cross section Y min.

19.8 [0.78] min.

256.5

[10.10]

Mounting flange

(ref.)

1.96 [0.077]

Rear view (no pads shown)

P100619

Per ANSI B92.1-1970

26.7 [1.05] to shaft spline

Contact Danfoss for individual dimension drawings

Technical Information

Series 40 M46 Pumps

Installation Drawings - Single Pump Dimensions

Auxiliary Mounting Flanges

Auxiliary mounting flange and coupling options

Number of teeth N Auxiliary mounting flange Spline pitch dia. P Minimum clearance

9 SAE A Option A 14.29 [0.563] 36.6 [1.44] 11 SAE B Option B 17.46 [0.688] 42.4 [1.67]

Suction filtration adapter

143.8 [5.66]

Front view (with MDC)

72.6

min. dia.

[2.86]

Left side view (with MDC,

charge pump, and suction filtration)

Top view (with MDC, charge pump, and suction filtration)

Bottom view (with MDC and suction filtration)

211.8 [8.34]

33.5 [1.32]

260.61 [10.26]

Remote filtration with or without charge pump

171.7 [6.76]

Mounting

flange

(ref.)

212.3 [8.36]

7.1

[0.28]

2.3

[0.09]

Pump

64.0 [2.52]

case outlet (alt.)

73.03

[2.875]

(2) places

114.8 [4.52]

14.27 dia. [0.562] (2) places

121.9 [4.90]

141.7 [5.58]

113.3 [4.46]

22.4 [0.88]

80.8 [3.18]

CWCCW

109.5 [4.31]

0.8 R max. [0.03]

LEFT SIDE VIEW

Pum p

117.7 [4.63]

120.1 [4.73]

131.1 [5.16]

(No CP)

P100618

17.60 [0.693]

101.57 ± 0.025

[3.999 ± 0.001]

Approx.center of gravity

Ø72.6 [2.68]

[3.999]

101.57

0.001

0.025

9.7

[0.38]

+ 0.0

- 0.5 + 0.00

- 0.02

92.9

[3.66]

66.9

[2.63]

Case

outlet

133.4 [5.25]

20°

Manual displacement control

handle position Up

55.9 [2.20]

39.6

[1.56]

30.0

[1.18]

[0.293]

7.44

1.14

0.045

± ±

195.7 [7.70]

43.8

[1.72]

54.1

[2.13]

22.6

[0.89]

Disp.limiter #2

Side #2

Side #1

Contact Danfoss for individual dimension drawings.

Technical Information

Series 40 M46 Pumps

Installation Drawings - Single Pump Dimensions

Pump, filtration/charge pump options, MDC, displacement limiter

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 53

M46 PV adjustable displacement limiter (option)

Shaft rotation CW CCW

Displacement limiter side 2 2 Limits flow out of port B A

3/8-16 thd.

18.3 [0.72] min. full thd. depth

(2) holes

SAE B Auxiliary mounting flange

Option B

SAE A Auxiliary mounting flange

options A and D

53.19

[2.094]

106.38 [4.188]

P pitch dia. 30° pressure angle N teeth, 16/32 pitch fillet root side fit Per ANSI B92.1-1970 (see table)

474.9

[18.70]

Mounting flange

(ref.)

474.9

[18.70]

1/2-13 Rear mounting hole (ref.)

8.38

[0.33]

1.0 max. R [0.04]

0.5 max. R [0.02]

Y min.

14.7 [0.58]

1.96 ± 0.018

14.27 [0.562] dia. thru (2) holes

73.03

[2.875]

146.05 [5.75]

No auxiliary mounting flange

1/2-13

26.4 [1.04] min. full thd.

59.7

[2.35]

51.3

[2.02]

P100628

79.8

[3.14]

79.8

[3.14]

89.9

[3.54]

91.8

[3.61]

min.

[0.077] ± 0.077

Ø 88.62

[3.489]

+ 0.005

- 0

+ 0.127

- 0 Ø 82.6

[3.252]

+ 0.076

- 0

+ 0.003

- 0

1/2-13 Rear mounting hole (ref.)

Mounting flange

(ref.)

pitch dia. 30° pressure angle 13 teeth, 16/32 pitch fillet root side fit per ANSI B92.1-1970

(see table)

20.638 [0.8125]

Class 7

11.4

[0.45]

min.

1.2 ± 0.127

[0.049] ± 0.005

0.5 max. R [0.02]

1.0 max. R [0.04]

14.7

[0.58]

26.9 ± 0.38

[1.06 ± 0.015]

min.

47.8

[1.88]

Ø 105.64

[4.159]

+ 0.076

- 0

+ 0.003

- 0

Ø 101.65

[4.002]

+ 0.076

- 0

+ 0.003

- 0

O-ring seal required

ref. 82.22 [3.237]

2.62 [0.103] dia. cross section

ref. 101.27 [3.987]

2.62 [0.103] dia. cross section

Technical Information

Series 40 M46 Pumps

Installation Drawings - Tandem Pump Dimensions

Auxiliary mounting flange

Auxiliary mounting flange and coupling options

Auxiliary mounting flange Spline pitch dia. P Number of teeth N Minimum clearance

SAE A Option A 14.30 [0.563] 9 34.8 [1.37] SAE B Option B 17.46 [0.688] 11 37.34 [1.47]

M12 x 1.75 6H Thd. X2

P104425

32.51 [1.28] X2

349 [13.74]

Technical Information

Series 40 M46 Pumps

Installation Drawings - Tandem Pump Dimensions

Rear mounting boss

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 55

Front view (with MDC)

Top view (with MDC, charge pump, and suction filtration)

Bottom view (with MDC and suction filtration)

Remote filtration

or no charge pump

171.7 [6.76]

mounting

flange

(ref.)

212.3 [8.36]

7.1

[0.28]

2.3

[0.09]

Pump

73.03

[2.875]

(2) places

14.27 dia. [0.562] (2) places

126.2 max. [4.97]

116.3 [4.58]

141.7 [5.58] for MDC

203.7 [8.02]

274.8 [10.82]

341.4 [13.44]

493.0 [19.41] max

101.57 ± 0.025

[3.999 ± 0.001]

72.6

min dia.

[2.86]

39.6

[1.56]

30.0

[1.18]

13.2

[0.52]

91.2

[3.59]

max

Left side view (with MDC,

charge pump, and suction filtration)

CWCCW

20.4 [0.8]

118.9 max. [4.68]

108.2 max. [4.26]

0.8 R max. [0.03]

LEFT SIDE VIEW

Pump

131.9 [5.19]

134.4 [5.29]

145.3 [5.72]

(no CP)

P100620

Displacement Limiter #2

Ø72.6 [2.68]

[3.999]

101.57

0.001

0.025

9.7

[0.38]

+ 0.0

- 0.5 + 0.00

- 0.02

92.9

[3.66]

233.9 [9.21]

73.2

[2.88]

Case

outlet

113.4 [4.46]

108.7 [4.28]

70.6

[2.78] Case

outlet

(alternate)

[0.293]

7.44

1.14

0.045

195.7 [7.70]

326.7

[12.86]

43.8

[1.72]

54.1

[2.13]

22.6

[0.89]

416.4

[16.39]

98.0

[3.86]

55.9

[2.20]

59.4

[2.34]

[1.56]

[1.32]

[1.18]

39.6

30.0

33.5

Side #2

Side #1

Contact Danfoss for individual dimension drawings.

Technical Information

Series 40 M46 Pumps

Installation Drawings - Tandem Pump Dimensions

Pumps, filtration/charge pump options, MDC, displacement limiters

19.05 [0.75]

10.08 [0.397] dia. (3)

20°

50.8 [2.00]

29.5 [1.16]

20°

Mounting flange location (ref.)

141.5 [5.57]

3.18

[0.125]

Pump

P100629

19.05 [0.75]

Ø10.08 [0.397]

20°

50.8 [2.00] R

29.5 [1.16] R

20°

162.3 [6.39]

152.8 [6.01]

4.75 [0.187]

Pump

P108398

Technical Information

Series 40 M46 Pumps

Control Options - Installation Drawings

Control options, AC, AK

Three hole control handle with standard spring

Option GB

Control handle with heavy spring and heavy duty four hole handle

Contact Danfoss for individual dimension drawings.

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 57

19.05 [0.75]

10.08 [0.397] dia. (3)

20°

50.8 [2.00]

29.5 [1.16]

20°

Mounting flange location

(ref .)

141. 5 [5.57]

3.18

[0.125]

Pu mp

P108515-

Technical Information

Series 40 M46 Pumps

Control Options - Installation Drawings

Options AB, AW

Two hole control handle with standard spring

P108771-

121.9 ± 2.5

103 ± 1.5

169.8 ± 2.5

80.8 ± 1.5

73 ± 0.18

64 ± 1.5

Case outlet (alternate)

79.8 ± 1.5

System ports

2x Ø14.27

+0.25

-0.89

193.5 ± 2.5 Control manual override C1

Control manual override C2

From remote filter

ISO 11926-1 7/8-14

210 ± 2.5

185.4 ± 2.5

171.4 ± 2.5

35.6 ± 1.5

Bypass valve (full open at two revolutions)

System gauge port A

ISO 11926-1 9/16-14

16.8 ± 1

42.2 ± 1.5

8.1 ± 1

System gauge port B

ISO 11926-1 9/16-14

System port B

ISO 11926-1 1 5/16-12

System port A

39.6 ± 1.5

195.6 ± 2.5

ISO 11926-1 1 5/16-12

30 ± 1.5

81.9 ± 1.5

43.7 ± 1.5

Servo gauge port M5 ISO 11926-1 1 9/16-18

78.7 ± 1.5

55.9 ± 1.5

Servo gauge port M4 ISO 11926-1 1 9/16-18

Case outlet (alternate)

ISO 11926-1 1 1/16-12

81.9 ± 1.5

269.5 ± 2.5

33.5 ± 1.5

Case outlet

ISO 11926-1 1 1/16-12

Charge pump inlet

ISO 11926-1 1 5/16-12

78.7 ± 1.5

211.8 ± 2.5

143.8 ± 2.5

Charge filtration port E

Charge gauge port for remote filtration with or w/o charge pump option

To remote filter

ISO 11926-1 7/8-14

Charge filtration port D

Charge gauge port for remote filtration with charge pump option

Technical Information

Series 40 M46 Pumps

Control Options - Installation Drawings

HC EDC Control

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 59

177.8 max. [7.00]

141.7 [5.58] To ports

49.0 [1.93]

118.1 [4.65]

39.6 [1.56] to ports

49.0 [1.93]

118.1 [4.65]

39.6 [1.56] to ports

352.3 [13.87]

421.4 [16.59]

39.6 [1.56] to ports

Port X2

Port X1

7/16 -20*

Control pressure ports

(2) places

Port X2 (front)

Port X1 (front)

7/16 - 20*

Control pressure ports

(4) places

Port X2 (rear)

Port X1 (rear)

Side view

Tandem pump with HDC

Side view

Variable pump with HDC

View X

Front view

Variable pump with HDC

P100631

Technical Information

Series 40 M46 Pumps

Control Options - Installation Drawings

Hydraulic displacement control (HDC)

Contact Danfoss for individual dimension drawings.

177.8 max. [7.00]

124.2 max. [4.89]

Side view

Variable pump with EDC

(Packard Weather-Pack connector)

View X

Front view

Variable pump with EDC

(Packard Weather-Pack connector)

Packard "Weather Pack" shroud connector

on 76 mm [3 in] lead wires

4-way (Dual Coil PCP) mates with Packard 12015797 connector

Danfoss mating parts kit part no. K03384 (female terminals)

View V

P100632

Packard Weather-Pack 4-way tower connector (male terminals)

138.4 [5.45]

Side view

Tandem pump with EDC

(MS connector)

124.2 max. [4.89]

332.0 [13.07]

124.2 max. [4.89]

View U

97.5

[3.84]

141.7 [5.58]

7/8 - 20 UNEF

MS53102C connector

mates with MS3106E-14S-2S

connector

7/8 - 20 UNEF

MS53102C connector

mates with MS3106E-14S-2S

connector

Pump

P108516

Deutsch Connector

Technical Information

Series 40 M46 Pumps

Control Options - Installation Drawings

Option CE

Electronic displacement control (EDC)

Options CG, CN

Electronic displacement control (EDC)

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 61

Connector per

ISO 4400

(2) Places

8.78

[223]

Side view

Tandem pump with FNR control

Side view

Variable pump with FNR control

View X front view

Variable pump with FNR control

Solenoid Plug Face

P109487

not connected

Terminal 1

Terminal 2

Technical Information

Series 40 M46 Pumps

Control Options - Installation Drawings

Options DA, DB

Three-position electric displacement control (FNR)

Technical Information

Series 40 M46 Pumps

Reference Literature

Literature

M46 systems may consist of a variety of pump, motor, valve and control combinations. Refer to the literature listed below for product information and specifications for M46 pumps and other Danfoss components.

M46 Pumps literature

•

Series 40 M46 Single Pumps Service Manual 11026743

•

Series 40 M46 Tandem Pumps Service Manual 11029852

Propel Systems related Literature

•

Series 40 Motors Technical Information 520L0636

•

L&K Frame Motors Technical Information 520L0627

•

JS 1000, JS 6000 Joystick Grips Technical Information 520L0872

•

PLUS+1 Controller Family Technical Information 520L0719

Hydraulic Systems Guidelines

•

Hydraulic Fluids and Lubricants Technical Information 520L0463

•

Pressure and Speed Limits BLN-9884

•

Design Guidelines for Hydraulic Fluid Cleanliness 520L0467

•

Experience with Biodegradable Hydraulic Fluids, Technical Information 520L465

•

Pressure and Speed Limits BLN-9884

•

Selection of Driveline Components BLN-9885

Danfoss | March 2017 L1001029 | BC00000176en-US0209 | 63

Danfoss Power Solutions GmbH & Co. OHG

Krokamp 35 D-24539 Neumünster, Germany Phone: +49 4321 871 0

Danfoss Power Solutions ApS

Nordborgvej 81 DK-6430 Nordborg, Denmark Phone: +45 7488 2222

Danfoss Power Solutions (US) Company

2800 East 13th Street Ames, IA 50010, USA Phone: +1 515 239 6000

Danfoss Power Solutions Trading (Shanghai) Co., Ltd.

Building #22, No. 1000 Jin Hai Rd Jin Qiao, Pudong New District Shanghai, China 201206 Phone: +86 21 3418 5200

Products we offer:

Comatrol

www.comatrol.com

Turolla

www.turollaocg.com

Hydro-Gear

www.hydro-gear.com

Daikin-Sauer-Danfoss

www.daikin-sauer-danfoss.com

Bent Axis Motors

•

Closed Circuit Axial Piston

•

Pumps and Motors Displays

•

Electrohydraulic Power

•

Steering Electrohydraulics

•

Hydraulic Power Steering

•

Integrated Systems

•

Joysticks and Control

•

Handles Microcontrollers and

•

Software Open Circuit Axial Piston

•

Pumps Orbital Motors

•

PLUS+1® GUIDE

•

Proportional Valves

•

Sensors

•

Steering

•

Transit Mixer Drives

•

Danfoss Power Solutions is a global manufacturer and supplier of high-quality hydraulic and electronic components. We specialize in providing state-of-the-art technology and solutions that excel in the harsh operating conditions of the mobile off-highway market. Building on our extensive applications expertise, we work closely with our customers to ensure exceptional performance for a broad range of off-highway vehicles.

We help OEMs around the world speed up system development, reduce costs and bring vehicles to market faster.

Danfoss – Your Strongest Partner in Mobile Hydraulics.

Go to www.powersolutions.danfoss.com for further product information.

Wherever off-highway vehicles are at work, so is Danfoss. We offer expert worldwide support for our customers, ensuring the best possible solutions for outstanding performance. And with an extensive network of Global Service Partners, we also provide comprehensive global service for all of our components.

Please contact the Danfoss Power Solution representative nearest you.

Local address:

Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already on order provided that such alterations can be made without changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

Danfoss | March 2017 L1001029 | BC00000176en-US0209

Danfoss M46 User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

Specifications

Design Specifications

Technical Specifications

Operating Parameters

Options

Fluid specifications

General Information

M46 Pumps

M46 Variable Pumps

System Circuit Diagram

Schematic Diagram

Features and Options

Features

Options

Operating Parameters

Fluids

Viscosity

Charge Pressure

Temperature

Control Pressure

Case Pressure

System Pressure

Speed Ratings

Inlet Pressure

System Design Parameters

Sizing Equations

Filtration

Suction Filtration

Charge Pressure Filtration

Reservoir

Redundant Braking System Requirement

Loop Flushing

Case Drain Usage for Tandem Pumps

Bearing Life and External Shaft Loading

Hydraulic Unit Life

Mounting Flange Loads

Shaft Torques

Shaft selection

Shaft torque and spline lubrication

Shaft torque for tapered shafts

Model Code - Single Pumps

Single Pumps

Model Code - Tandem Pumps

Tandem Pumps

Options

Shaft options

Single pumps

Tandem pumps

Charge Pump

Charge Pump Output Flow

Charge Pump Power Requirements

Charge Relief Valve

High Pressure Relief Valve (HPRV) and Charge Check

Bypass Function

Displacement Limiters

Auxiliary Mounting Pads and Auxiliary Pumps

Manual Displacement Control (MDC) - Options AB, AC, AK, AW, and GB

Hydraulic Displacement - Options BA, BB and BC

Electrical Displacement Control- Options CE, CG, CM, and CN

High Current Electric Displacement Control - Options HA (12Vdc) and HB (24Vdc)

Response times

Manual OverRide (MOR)

Three-position Electrical Control - Options DA and DB

Port Locations

Single Pump

Tandem Pump

Installation Drawings - Single Pump Dimensions

Auxiliary Mounting Flanges

Pump, filtration/charge pump options, MDC, displacement limiter

Installation Drawings - Tandem Pump Dimensions

Auxiliary mounting flange

Rear mounting boss

Pumps, filtration/charge pump options, MDC, displacement limiters

Control Options - Installation Drawings

Control options, AC, AK