pm25 pump - poclain · pdf fileinlet pressure charge pump inlet pressure is key for acceptable...

P M 25V A R IA B LE D IS P LA C E M E N T P U M PC LO S E D LO O P C IR C U IT

T E C H N I C A L C A T A L O G

2 29/05/2017

PM25 - Variable displacement pump POCLAIN HYDRAULICS

OOVERVIEWPM25 is a variable displacement, axial piston pump, with swashplate system, for closed loop hydrostatic transmissions.

It provides a continuously variable flow rate between zero and maximum in forward and reverse direction. Flow rate is proportional to rotation speed and swashplate angle.

It can feature a charge pump to keep the circuit pressurised. This avoids risk of cavitations and ensures a good performance of the transmission.

It offers several types of control: servo hydraulic, hydraulic automotive, direct or servo mechanical, electrical and electro-proportional.

It is equipped with high pressure relief valves and can be delivered with auxiliary gear pumps.

It is available in single or tandem versions.

As options, PM25 can be featured with flushing valve, filter on charge pressure line and safety devices to ensure safe operation of the machine.

PM25-20 PM25-25 PM25-28

Displacement cm³/rev[in³/rev.]

20,5 [1.25]

25,7 [1.57]

28 [1.71]

Theoretical Flow at rated speed

L/min[GPM]

73,8[19.50]

92,5[24.44]

100,8[26.63]

Rated speed rpm 3 600

Rated pressure bar [PSI] 250 [3 625]

Max. Pressure bar [PSI] 350 [5 076]

Mounting flange SAE B

Controls Hydraulic, hydraulic automotive, direct or servo mechanical, electrical, electro-proportional

Mass kg [lb] from 13 [28.7] to 18 [39.7]

Rotation Clockwise or Counterclockwise

POCLAIN HYDRAULICS Variable displacement pump - PM25

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CCONTENT

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MODEL CODE 4

TECHNICAL SPECIFICATIONS 6Features 6Main dimensions 7Port characteristics 7

OPERATING PARAMETERS 9Operating parameters 9Charge pressure 9Case pressure 9Pressure ratings 9Speed ratings 9Inlet pressure 10Theoretical output 10Poclain Hydraulics recommandations for fluid 10Fluid and filtration 11Viscosity range 11

SYSTEM DESIGN PARAMETERS 12Sizing equations 12Redundant braking system requirement 12Loop flushing 12Reservoir 13Case drain usage for tandem pump 13Differential pressure 13Bearing life and external shaft loading 14Hydraulic unit life 15Mounting flange loads 15

FEATURES 16High pressure relief valve 16Charge relief valve 17Charge pump 18Displacement limiters 19By-pass 19Mounting flange and shafts 20Auxiliary mounting pad 22Tandem pumps 24Gear pumps 25

CONTROLS 26Direct mechanical control 26Mechanical servo control with feed back 28Hydraulic servo control 30Electrical on-off servo control 32Electrico-proportional servo control 34Hydraulic automotive control 36

OPTIONS 39Roller bearing 39Fluorinated elastomer seals 39UNF threads ports 39Filter on pressure line 40External connections for filter 41Pressure cut-off valve 41Mechanical inching 42Hydraulic inching 42Neutral position switch 43Flushing valve 44Finishing coat 44Customized identification plate 45Anti-stall valve 45


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MMODEL

2 51 2

3ControlDirect mechanical control MMechanical servo control with feed back AHydraulic servo control SHydraulic automotive control 12V D12Hydraulic automotive control 24V D24Electrical on-off servo control with return spring without electrovalve B00Electrical on-off servo control with return spring and electrovalve 12V B12Electrical on-off servo control with return spring and electrovalve 24V B24Electrical on-off servo control without electrovalve C00Electrical on-off servo control with electrovalve 12V C12Electrical on-off servo control with electrovalve 24V C24Electro-proportional servo control 12V P12Electro-proportional servo control 24V P24

4Restrictor mm [in]Without restrictor 00Ø 0,6 [dia. 0.023] 06Ø 0,7 [dia. 0.027] 07Ø 0,8 [dia. 0.031] 08Ø 0,9 [dia. 0.035] 09Ø 1,0 [dia. 0.039] 10Ø 1,2 [dia. 0.047] 12

Restrictors can be assembled for controls typeA, B, C, P, S, D.

1Displacement cm3/rev [in3/rev]20,5 [1.25] 2025,7 [1.57] 2528 [1.71] 28

3 4 5

P M6

2Mounting flange and shaftSAE B; z=13; 16/32 D.P. S3SAE B; z=15; 16/32 D.P. S4SAE B; Key shaft Ø 22,22 mm [dia. 0.87 in] C3Shaft for secondary tandem pump T1

5High pressure relief valve setting Max. system pressure bar [PSI]Without valve (only check valve) 00150 [2 175] 15200 [2 900] 20250 [3 625] 25300 [4 351] 30350 [5 076] 35

6RotationClockwise RCounter clockwise L

MODEL CODE


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CCODE

7Charge relief valve setting bar [PSI]Without charge relief valve 0010 [145] (Only for control M) 1022 [319] (For all controls) 22

11107 8 9

8Charge pump displacement cm3/rev [in3/rev]Without charge pump 009,1 [0.55] (For all auxiliary mounting pads) 0812 [0.73] (For auxiliary mounting pad A or S) 12

9Auxiliary mounting padWithout auxiliary mounting pad SGerman group 2 flange GSAE A flange; z = 9 ATandem (without charge pump) T

10Gear pump cm3/rev [cu.in/rev]Without gear pump 00

German group 2 flange (if digit 9 = G)

4,0 [0.24] 046,0 [0.37] 068,5 [0.52] 0811,0 [0.67] 1114,0 [0.85] 1416,5 [1.00] 1719,5 [1.19] 20

SAE A flange (if digit 9 = A)

4,0 [0.24] 046,0 [0.37] 068,5 [0.52] 0811,0 [0.67] 1114,0 [0.85] 1416,5 [1.00] 1719,5 [1.19] 2022,5 [1.37] 2226,0 [1.59] 26

11OptionsWithout option 00Roller bearing CRFluorinated elastomer seals EVFilter on pressure line without clogging indicator F0Filter on pressure line with clogging indicator F2External connections for filter F3UNF Threads ports FUMechanical inching for control D ICHydraulic inching for control D HIPressure cut-off valve LPNeutral position switch for control A MIFlushing valve VSFinishing coat PACustomized identification plate DPAnti-stall valve SD

In case of request for a combination of several options, please contact your Poclain Hydraulics application engineer for further information.


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TTECHNICAL SPECIFICATIONS

Features

PM25-20 PM25-25 PM25-28

Displacement cm³/rev[in³/rev.]

20,5 [1.25]

25,7[1.57]

28[1.71]

Theoretical flow at rated speed (3600 rpm)

L/min[GPM]

73,8[19.50]

92,5[24.44]

100,8[26.63]

Max. Theoretical absorbed power at 320 bar [4 641 PSI] KW 39,4 49,3 53,8

Theorical absorbed torqueat 100 bar [1 450 PSI]

N.m[in.lbf]

32,6[288]

40,9[362]

44,6[395]

Moment of inertia kg.m²[slug.ft²] 0.0014 [0.0010]

Internal charge pump cm3/rev[in3/rev]

9,1 [0.55] or 12 [0.73]

Charge relief valve setting bar [PSI] From 10 [145] to 30 [435]

High pressure relief setting bar [PSI] Max. 350 [5 076]

Mounting flange SAE B

Mass kg [lb]18 [39.7] with control M

22,2 [48.9] with controls A, B, C, P, S24,7 [54.4] with control D

¨


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Main dimensions

PM 25 - SAE B - splined shaft with servo hydraulic control and without auxiliary mounting pad

Port characteristics

2 5 S41 2

A3 4 5

P M6 11107

S8 9

63 [2

.48]

118

[4.6

5]

91 [3.58]

48[1

.89]

48[1

.89]

90,5 [3.56]

X35

[1.3

8]

142 [5.59]

26 [1

.02]

88,5 [3.48]9,5 [0.37 ]0-0.05

0-0.002

26 [1

.02]

Ø 1

01,6

[dia

. 4.0

0

]

66,5

[2.6

2]

174 [6.85]

145 [5.71]

Ø 1

5 [d

ia. 0

.59]

91 [3.58]

27 [1

.06]

71 [2

.79]

68,5

[2.7

0]

138 [5.43]143,5 [5.65]

95 [3

.74]

43[1

.69]

33 [1

.30]

11,5

[0.4

5]

90 [3

.54]

88,5 [3.48]11 [0.43]

33 [1

.30]

11,5

[0.4

5]

11 [0.43]

195 [7.68]

+0 -0.0

54+0 -0

.002

View X

Clockwise (R)

Counterclockwise (L)

T1 S

M1

G2M2

T2

G1R

B

M4

A

M3

Port Function ISO 1179-1 (standard)

ISO 11926-1(option FU)

A-B Services 3/4’’ GAS 1 1/6-12-UNFG1/G2 Auxiliary 1/4’’ GAS 9/16-18-UNFM1/M2 A-B pressure 1/4’’ GAS 9/16-18-UNFM3/M4 Servo control pilot 1/4’’ GAS 9/16-18-UNFR Servo pilot pressure 1/4’’ GAS -S Suction 3/4’’ GAS 1 1/6-12-UNFT1/T2 Drain 1/2’’ GAS 3/4-16-UNF


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OOPERATING PARAMETERSOperating parameters

PM25-20 PM25-25 PM25-28

Speed ratings

Minimummin-1(rpm)

700

Max. without load 3 900Max. with load 3 600

System pressure

Ratedbar [PSI]

250 [3 625]

Maximum 370 [5 366]

Minimum low loop 10 [145]

Inlet pressure

Mini continuous bar (abs.)[PSI abs.]

0,8 [11.6]

Mini (cold start) 0,5 [7.2]

Case pressure

Continuous bar [PSI]1,5 [21.7]

Maximum (cold start) 2,5 [36.2]

Charge pressure

Standard versionbar [PSI]

10 [145] for control M; 22 [319] for other controls

Max. charge pressure 30 [435]

Servo casepressure Maximum bar [PSI] 30 [435]

Charge pressure

A charge flow is required to maintain a positive pressure in the low pressure loop of a closed loop hydrostatic transmission. Charge pressure ensures proper lubrication and rotating group operation. It is recommended to maintain the charge pressure at a minimum of 10 bar [145 PSI] above case pressure. For more details, refer to charge pump paragraph, page 18.

Case pressure

Case pressure must be maintained within the limits shown in the table ''Operating parameters''. Ensure housing is always filled with hydraulic fluid and especially during start-up of the machine.

Pressure ratings

Maximum peak pressureIt is the maximum allowable pressure. It is equivalent to the maximum setting of the maximum high pressure relief valve. A self-propelled machine can reach the maximum peak pressure value no more than 1-2% of that work cycle.

Work cycleA fundamental factor for ensuring correct hydrostatic transmission sizing is the machine work cycle (pressure-time ratio, seasonality, pressure vs. percentage of time at max. displacement, machine type). Part service life depends on the correct choice in relation to the work cycle.

OverloadsIt is mandatory to protect parts against any possible overloads.

Speed ratings

The table ''Operating parameters'' gives minimum and maximum rated speeds. Note that all displacements might operate under different speed limits. Definitions of these speed limits appear below.

Maximum speed is the highest operating speed allowed. Over speeding reduces pump life time, can lead to loss of hydrostatic power and braking capacity. Never exceed the maximum speed limit under any operating conditions.

Nominal speed is the speed offering the maximal efficiency.


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Inlet pressure

Charge pump inlet pressure is key for acceptable pump life and performances. A continuous inlet pressure of not less than 0,8 bar abs. [11.6 PSI abs.] is recommended. A continuous inlet pressure less than 0.5 bar abs. [7.2 PSI abs.] indicates inadequate inlet design or a restricted filter. Pressures less than 0.5 bar abs. [7.2 PSI abs.] can happen at cold start, but should increase with oil temperature.

Theoretical output

Theoretical output flow is a function of pump displacement and speed. It is relevant to size the rest of the circuit. Theoretical flow does not take into account losses due to leakage or variations in displacement. Refer to performances, page 6, for volumetric and overall efficiencies at various operating speeds and pressures.

Poclain Hydraulics recommandations for fluidPoclain hydraulics recommends the use of hydraulic fluids defined by the ISO 15380 and ISO 6743-4 standards.For temperate climates, the following types are recommended.• HM 46 or HM 68 for fixed installations.• HV 46 or HV 68 for mobile installations.• HEES 46 for mobile installations.

These specifications correspond to category 91H of the CETOP standard, parts 1, 2 and 3 of the DIN 51524 standard, and grades VG32, VG 46 and VG68 of the ISO 6743-4 standards.

It is also possible to use ATF, HD, HFB, HFC or HFD type hydraulic fluid upon Poclain Hydraulics specific approval of the components’ operating conditions.

Standardized designations for the fluids• HM : Mineral fluids having specific antioxidant, anticorrosion and antiwear properties (HLP equivalent to DIN 51524

parts 1 and 2).• HV : HM mineral fluids providing improved temperature and viscosity properties (DIN 51524 part 3).• HEES :Biodegradable fluids based on organic esters.It is also possible to use a fluid that meets the biodegradability criteria and is compatible in the event of accidental food contact. The BIOHYDRAN FG 46 fluid designed by the company Total has undergone testing of its properties and performance on our test benches. Since this type of fluid has not yet been categorized, it is the responsibility of machine manufacturers to validate its compatibility with all of the components used in order to guarantee that the intended functions will be fulfilled and this for the desired life time of all equipment items.

During operation, the temperature of the oil must be between 0°C [32°F] and 80°C [176°F]; the minimum and maximum temperatures may be exceeded momentarily by ± 20°C [± 68°F] for a duration of less than 30 minutes.For all applications outside these limits, please consult with your Poclain Hydraulics’ application engineer.

For biodegradable fluids, consult your Poclain Hydraulics’ application engineer


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Fluid and filtration

The contaminating particles suspended in the hydraulic fluid cause the hydraulic mechanisms moving part wear. On hydraulic pumps, these parts operate with very small dimensional tolerances. In order to reach the part life, it is recommended to use a filter that maintains the hydraulic fluid contamination class at a max. of:

9 according to NAS 163822/18/13 according to ISO 4406:1999

According to the type of application decided for the pump, it is necessary to use filtration elements with a filtration ratio of:

20 to 30 100

Making sure that this ratio does not worsen together with the increasing of the filter cartridge differential pressure.

If these values cannot be observed, the component life will consequently be reduced and it is recommended to contact the Poclain Hydraulics Customer Service.

Filters on charge circuitFilters on the charge circuit (F0-F2) are designed without by-pass. The max. pressure drop on the filtration part must not exceed 2 bar [29 PSI] (3 bar [43.5 PSI] in case of cold starting) at pump full rating. To monitor the pressure drop, It is recommended to use the clogging indicator on the filtration element (F2 option). Contact your Poclain Hydraulics Application engineer, each time the pump is not charged by its internal charge pump. Filters on charge circuit are mounted on the pump special support.

Filters assemblingThe suction filter is mounted on the suction line. Check that the pressure before the charge pump is 0.8 bar abs. [11.6 PSI abs.], measured on the pump suction port (0.5 bar [7.2 PSI] for cold starting).

Viscosity range

For both max. efficiency and life of the unit, the operative viscosity should be chosen within the optimum range of:opt = optimum operating viscosity from 16 to 36 mm2/s [from 74.1 to 166.8 SUS] referred to the closed loop temperature.

Working conditions: the following limits of viscosity applymin = 5 mm2/s [23 SUS] short-duration at a max. permissible leakage oil temperature of 90° C [194°F]max = 1000 mm2/s [4 634 SUS] short-duration, on cold start.

VG 22VG 32VG 46VG 68

VG 100

-40

10

5

20

40

60

100

200

400600

10001600

46

23

93

185

278

463

927

1854278046347414

-25 -10 0 10 30 50 70 90 115

-40 -13 14 32 50 86 122 158 194 239

°C

[°F]

mm2/s [SUS]

Hydraulic fluid temperature range

For brief instants during the cold starting

Optimum viscosity

For b

rief i

nsta

nts

with

leak

age

oil a

t 90°

C

Ensure fluid temperature and viscosity limits are concurrently satisfied.


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SSYSTEM DESIGN PARAMETERSConsult your Poclain Hydraulics application engineer to validate your design parameters before using the pump in your application.

Sizing equations

The following equations are helpful when sizing hydraulic pumps. Generally, the sizing process is initiated by an evaluation of the machine system to determine the required motor speed and torque to perform the necessary work function. First, the motor is sized to transmit the maximum required torque. The pump is then selected as a flow source to achieve the maximum motor speed.

SI units

Output flow Q = (l/min)

Vg=Displacement per revolution cm3/tr [in3/rev]p = po - pi (system pressure) bar [PSI]

n = Speed min-1 [rpm]v = Volumetric efficiencym = Mechanical efficiencyt = Overall efficiency ( v. m)

Input torque M = (N.m)

Input power P = = (kW)

US units

Output flow Q = [GPM]

Input torque M = [lbf.in]

Input power P = = [hp]

Redundant braking system requirement

Loop flushing

Closed circuit may require a flushing valve to meet temperature and cleanliness requirements. A flushing valve takes a part of hot fluid flow from the low pressure loop of the system loop for cooling and filtering. Make sure that the charge pump provides adequate flow for the flushing valve flushing and the flushing valve does not cause charge pressure to drop below recommended limits..

Vg.n. v1000

Vg. p20. . m

M. n.30 000

Q. p600. t

Vg.n. v231

Vg. p2. . m

M.n.198 000

Q. p1714. t

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.

B

A

ST1 T2

M4M3

M1G1 G2 R M2

See option VS page 44 for more information


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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 pump

On tandem pumps, and to ensure lubrification of both pumps, excess flow from the second pump charge relief valve must be routed into the housing of the first pump.

Differential pressure

The differential pressure is the High pressure relief valve setting minus Charge relief valve setting.

M1-1 A-1 M3-2M4-2 M1-2G2-2

B-2

M2-2G1-2R-1

S

M2-1

B-1

R-2

T

M3-1M4-1

A-2G1-1

M3M4

M1 M2

T1 T2 SB

A

G1 G2 R High pressure relief valve setting

Charge relief valve setting

Differential pressure

Max. system pressure=


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Bearing life and external shaft loading

Bearing life:

Bearing life is a function of speed, pressure , swashplate angle and external loads. Oil type and viscosity impact bearing life.

Normal bearing life in B10 hours is shown in the above table. Figures have been calculated under the following operating conditions : a continuous differential pressure of 130 bar [1 885 PSI], 1 800 rpm shaft speed, maximum displacement, without any external shaft side load. The data is based on a 50% forward, 50% reverse duty cycle, standard charge pump size, and standard charge pressure.

Shaft Loads:

PM25 pumps are designed with bearings that can accept external radial and thrust loads. The external radial shaft load limits depend on the load position, orientation, and operating conditions of the unit.

The maximum permissible radial load (Re), is based on the maximum external moment (Me), and the distance (L) from the mounting flange to the load. It may be determined using the table and formula below. Thrust (axial) load limits are also shown.

Re = Me / L

All external shaft loads affect bearing life. In applications with external shaft loads, minimize the impact by positioning the load at 90° or 270° as shown in the figure.

Contact your Poclain Hydraulics representative for an evaluation of unit bearing life if: • Continuously applied external loads exceed 25 % of the maximum allowable radial load Re.• The pump swashplate is positioned on one side of center all or most of the time.• The unit bearing life (B10) is critical.

Radial and thrust load position

Bearing life (B10 hours)

PM25-28 12 900

External moment (Me)N.m [in.lbf]

Maximum shaft thrust in (Tin)N [lbf]

PM25-28 44 [389] 1 000 [224.8]

at 120 bar [1 740 PSI] and 3 600 rpm

L

Re

TinTout

0° Re

180° Re

90° Re 270° Re

End view of shaft

Axis of swashplate rotation

For an accurate calculation, consult your Poclain Hydraulics application engineer.


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Hydraulic unit life

Hydraulic unit life is the life expectancy of the hydraulic components. It depends on speed and system pressure even if , system pressure is the dominant operating variable. High pressure, generated by high load, reduces hydraulic unit life.

Design the hydraulic system according to the expected machine duty cycle. Take in consideration the expected percentages of time at various loads and speeds. Ask your Poclain Hydraulics representative to calculate an appropriate pressure based your hydraulic system design. If duty cycle data is not available, input power and pump displacement are used to calculate system pressure.

All pressure limits are differential pressures (referenced to charge pressure) , taking a normal charge pressure in consideration.

PM25 pumps will meet satisfactory life expectancy if applied within the parameters specified in this technical documentation. For more detailed information on hydraulic unit life see Operating Parameters in page 9.

Mounting flange loads

Adding tandem mounted pumps, and/or tandem auxillary pump(s), subjecting pumps to shock loads may generate excessive loads on the front mounting flange. The overhung load moment for multiple pump mounting can be estimated as shown in the figure bellow

Overhung load example

Estimating overhung load moments

W = Weight of pump (kg)L = Distance from mounting flange to pump center of gravity (CG)

MR = GR (W1L1 + W2L2 + ... + WnLn)MS = GS (W1L1 + W2L2 + ... + WnLn)

Where:MR = Rated load moment (N.m)MS = Shock load moment (N.m)GR*= Rated (vibratory) acceleration (G’s) (m/sec²)GS*= Maximum shock acceleration (G’s) (m/sec²)

*Calculations will be carried out by multiplying the gravity (g = 9.81 m/sec²) with a given factor. This factor depends on the application.

Allowable overhung load moment are shown in the above table. Exceeding these values requires additional pump support.

L1

L2

CGpump 2

CGpump 1 Auxiliary pad

Mounting flange

Rated moment (MR) N.m [in.lbf]

Shock load moment (MS) N.m [in.lbf]

PM25-20 370 [3 274] 600 [5 310]

PM25-25 370 [3 274] 600 [5 310]

PM25-28 370 [3 274] 600 [5 310]

For an accurate calculation, consult your Poclain Hydraulics application engineer.


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FFEATURESHigh pressure relief valve

The high pressure relief valves maintain circuit pressure in the proper range. The check valves allow charge flow to replenish the low pressure loop of the circuit. The high pressure relief valves ensure a high pressure protection of the high pressure loop of the circuit.

High pressure relief valves are available in a range of settings.

When high pressure relief valves are not desired, pumps is equipped with charge circuit check valves only.

High pressure relief valves are intended for transient overpressure protection and are notintended for continuous pressure control. Flow over relief valves for extended periods of timemay result in severe heat build up. High flows over relief valves may result in pressure levelsexceeding the nominal valve setting and potential damage to system components.

M3M4

M1G1 G2 R M2

A

BST2T1

Flow

ISO VG46 hydraulic fluid at 50°C [122°F]

300

200

100

0 25 50 75 100

6.6 13.2 19.8 26.4

400

4 351

2 900

1 450

5 801

bar PSI

L/minGPM

High pressurerelief valve

2 51 2 3 4 5

P M6 11107 8 9

High pressure relief valve

Available setting bar [PSI]

Without - 00

With

150 [2 175] 15

200 [2 900] 20

250 [3 625] 25

300 [4 351] 30

350 [5 076] 35

Pres

sure

The high pressure relief valve setting is not thedifferential pressure between A and B ports (seepage 13).


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Charge relief valve

The charge pressure relief valve provides a relief outlet for charge circuit. This valve is used to set the charge pressure of the circuit. Flow through the valve is ported to case.

The nominal charge relief setting is referenced to case pressure.

Incorrect charge pressure settings may result in the inability to buildrequired system pressure and/or inadequate loop flushing flows.Ensure correct charge pressure under all conditions of operation tomaintain pump control performance.

30

25

20

15

10

5

0

435

362.6

290

217.5

145

72.5

0500 1000 1500 2000 2500 3000

bar PSI

M3M4

M1G1 G2 R M2

A

BST2T1

Pump speed (rpm)

Pre

ssur

e di

ffere

nce

ISO VG46 hydraulic fluid at 50°C [122°F]

Charge relief valve

2 51 2 3 4 5

P M6 11107 8 9

Charge relief valve

Available settingbar [PSI]

Without - 00

WithOnly for control M 10 [145] 10

For all controls 22 [319] 20


18 29/05/2017

Charge pump

Charge flow is required on all PM25 pumps used in closed circuit installations. The charge pump provides flow to make up internal leakage, maintain a positive pressure in the main circuit, provide flow for cooling and filtration, replace any leakage losses from external valving or auxiliary systems, and to provide flow and pressure for the control system.Many factors influence the charge flow requirements. 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, hydrostatic motor type, etc.Unusual application conditions may require a more detailed review of charge pump sizing. Charge pressure must be maintained at a specified level under all operating conditions to prevent damage to the transmission. Poclain Hydraulics recommends testing under actual operating con-ditions to verify this.

Charge pump sizing/selection

In most applications a general guideline is that the charge pump displacement should be at least 20% of the main pump displacement.

M3M4

M1G1 G2 R M2

A

BST2T1

Charge pump Displacement cm³/rev [in³/rev]

Rated speed rpm

Without - - 00

With

For all auxiliary mounting pads 9,1 [0.55] 3900 08

Only auxiliary mounting pad A 12 [0.73] 3900 12

Contact your Poclain Hydraulics application engineer for more information.

2 51 2 3 4 5

P M6 11107 8 9


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Displacement limiters

PM25 are designed with mechanical displacement (stroke) limiters. You can limit maximum displacement of the pump to a certain per-cent of its maximum displacement to near zero in both direction.

The displacement limiters are located on the both sides of the servo piston and are adjustable by screw.

By-pass

PM25 features a by-pass function. By-passing Port A and Port B is achieved by unscrewing a screw located on the cover. The by-pass connect the ports A-B and must be use only in emergency case and only for short movement.

Take care in adjusting displacement limiters to avoid an undesirable condition of output flowor speed. Retorque the sealing lock nut after every adjustment to prevent an unexpectedchange in output conditions and to prevent external leakage during pump operation.

Max. displacement adjustement

Max. displacementadjustement

Neutral position adjustement

Max. displacement adjustement

Max. displacementadjustement

PM25 with control M PM25 with other controls

M3M4

M1G1 G2 R M2

A

BST2T1

By-pass valve is intended for moving a machine for very shortdistances at very slow speeds. It is NOT intended as tow valve.

To avoid leakage, do NOT exceed two turns of the screw.


20 29/05/2017

Mounting flange and shafts

SAE B - Splined shaft

S3 13 teeth Max. torque: 220 Nm [1947 in.lbf]

S4 15 teeth Max. torque: 360 Nm [3186 in.lbf]

2 51 2 3 4 5

P M6 11107 8 9

M6

16 [0.63]

9.50-0.05

41[1.61]

31 [1.22]

10 [0.39]

20 [0.79]

+0 -0.0

54Ø

101

,6

[dia

. 4.0

0

]

+0 -0

.002

+0 -0.0

54Ø

101

,6

[dia

. 4.0

0

]

M6

16 [0.63]

0-0.05

46[1.81]

38 [1.50]

8 [0.31]

25 [0.98]

9.5

+0 -0.0

02

Splined ANSI B92.1a-1996Pitch 16/32” DPPressure angle 30°Tolerance class: 5

Splined ANSI B92.1a-1996Pitch 16/32” DPPressure angle 30°Tolerance class: 5


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SAE B - Key shaft

Ø = 22,22 mm [dia. 0.87 in] Max. torque: 220 Nm [1947 in.lbf]

2 5 C31 2 3 4 5

P M6 11107 8 9

4,5[0.18]

25[0.98]

M8

25,0

8[0

.99

]

0 -0.2

6,35

[0

.25

] +0

.000

-0.0

36

0-0.05

33 [1.30]

8 [0.31]

9.541

[1.61]

19 [0.75]

+0 -0.0

54Ø

101

,6

[dia

. 4.0

0

]

+0 -0

.002

+0.0

00-0

.013

Ø 2

2,22

[d

ia. 0

.87

]

+0.0

00-0

.000

5

0 -0.0

8

+0.0

00-0

.001


22 29/05/2017

Auxiliary mounting pad

SAE A flange

00 Without charge pump

Max. Torque: 80 N.m [708 in.lbf]

8 With charge pump: 9,1 cm3/rev [0.55 in3/rev]

12 With charge pump: 12,0 cm3/rev [0.73 in3/rev]

2 51 2 3 4 5

P M6 11107

A8 9

Ø 1

06,4

[dia

. 4.1

9]

130,

4 [5

.13]

+0.0

71+0

.036

Ø 8

2,55

[d

ia. 3

.25

]

201 [7.91]

20 [0.79]

33,5[1.32]

35 [1.38]8 [0.31]

4 x

M10

+0.0

03+0

.001

Do not rotate the auxiliary mounting pad cover.

Splined ANSI B92.1a-1996Pitch 16/32” DPPressure angle 30°9 teethTolerance class: 5


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German group 2 flange

00 Without charge pump

Max. torque: 48 N.m [425 in.lbf]08 With charge pump: 9,1cm3/rev [0.55 in3/rev]

2 51 2 3 4 5

P M6 11107

G8 9

14,5 [0.57]

60 [2

.36]

30[1

.18]

115,4 [4.54]

100,

4 [3

.95]

+0.0

00+0

.030

Ø 5

2 [d

ia. 2

.04

]

6,5 [0.25]

2,5 [0.10]

39 [1.53] 8 [0.3

1

]

-0.0

25-0

.061

205 [8.07]

18[0.71]

8 x

M10

60 [2.36]

8 [0.31]

+0.0

00+0

.001

-0.0

01-0

.002

Do not rotate the auxiliary mounting pad cover.

Splined ANSI B92.1a-1996Pitch 16/32” DPPressure angle 30°9 teethTolerance class: 5


24 29/05/2017

Tandem pumps

Next pumpRear axial pump

Front axial pump

Me3 for the next pumpMe2 for the second pumpMe imput torque

Me1 for the first pump

Torque required by auxiliary pumps is additive. Ensure requirements don’t exceed shaft torque ratings.

2 51 2 3 4 5

P M6 11107

00 T8 9

2 5 T1P M

Front axial pump

Rear axial pump

+

Number of charge pump in the tandem

Axial pump

Mounting flange and shaft

Charge pump

Auxiliary mounting flange

0 charge pump

FrontSAE B; 13 teeth S3

Without 00 Tandem fitting TSAE B; 15 teeth S4

RearShaft for

secondary tandem pump

T1 Without 00SAE A flange A

Without auxiliary mounting pad S

1 charge pump*

FrontSAE B; 13 teeth S3

Without 00 Tandem fitting TSAE B; 15 teeth S4

RearShaft for

secondary tandem pump

T1 With08or 12

SAE A flange AWithout auxiliary

mounting pad S

Max. torque intermediate coupling200 N.m [1 770 in.lbf]

* The charge pump can only be located on the rear axial pump.Ports T and G of the first pump must be connected with ports T and G of the second pump.


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Gear pumps

M1-1 A-1 M3-2M4-2 M1-2G2-2

B-2

M2-2G1-2R-1

S

M2-1

B-1

R-2

T

M3-1M4-1

A-2G1-1

Displacement Pressure Dimension Mass EfficiencyContinuous

max. pressure

Max. intermittent pressure

Max. peak pressure A B C

cm3/rev [cu.in/rev] bar [PSI] bar [PSI] bar [PSI] mm [in] mm [in] mm [in] Kg [lb] %

G

German group 204 4

[0.24]250

[3 625]270

[3 915]290

[4 205]90,3

[3.55]

88[3.46]

100[3.94]

2,30[5.07]

95*

06 6,0 [0.37]

250 [3 625]

270 [3 915]

290 [4 205]

93,6[3.68]

2,45[5.40]

08 8,5 [0.52]

250 [3 625]

270 [3 915]

290 [4 205]

97,8[3.85]

2,60[5.73]

11 11,0 [0.67]

250 [3 625]

270 [3 915]

290 [4 205]

101,9[4.01]

2,70[5.95]

14 14[0.85]

250 [3 625]

270 [3 915]

290 [4 205]

106,9[4.21]

2,80[6.17]

17 16,5[1.01]

230 [3 335]

240 [3 480]

250 [3 625]

111,1[4.37]

2,95[6.51]

20 19,5 [1.19]

210 [3 045]

220 [3 190]

230 [3 335]

116,1[4.57]

3,10[6.84]

A

SAE A flange

04 4[0.24]

250 [3 625]

270 [3 915]

290 [4 205]

93,0[3.66]

130,4[5.13]

95[3.74]

2,30[5.07]

95*

06 6,0 [0.37]

250 [3 625]

270 [3 915]

290 [4 205]

96,3[3.68]

2,45[5.40]

08 8,5 [0.52]

250 [3 625]

270 [3 915]

290 [4 205]

100,5[3.96]

2,60[5.73]

11 11,0 [0.67]

250 [3 625]

270 [3 915]

290 [4 205]

104,6[4.12]

2,70[5.95]

14 14[0.85]

250 [3 625]

270 [3 915]

290 [4 205]

109,6[4.21]

2,80[6.17]

17 16,5[1.01]

230 [3 335]

240 [3 480]

250 [3 625]

113,8[4.37]

2,95[6.51]

20 19,5 [1.19]

210 [3 045]

220 [3 190]

230 [3 335]

118,8[4.68]

3,10[6.84]

22 22,5 [1.37]

190 [2 755]

200 [2 900]

210 [3 045]

123.8[4.87]

3,25[7.17]

26 26 [1.59]

170 [2 465]

180 [2 610]

190 [2 755]

129,6[5.10]

3,40[7.50]

* Value collected during the testing at 1500 rpm

A

B

C

A

B

C

Gear pumps are always delivered flanged on the axial pump. They can not be sold alone.

2 51 2 3 4 5

P M6 11107 8 9

Auxiliary mounting pad

Gear pump


26 29/05/2017

CCONTROLSDirect mechanical control

The variation in pump displacement is obtained by rotating the lever shaft in a clockwise or counter-clockwise direction.

The lever shaft is directly linked to the pump swashplate.

The angle is at 15° for 20,5 cm3/rev [1.25 in3/rev] displacement and at 18° for 25,7 cm3/rev [1.57 in3/rev].

2 51 2

M3 4 5

P M6 11107 8 9

30

20

10

025 50 75 100

265.5

177

88.5

0

N.m [in.lbf]

200 bar [2 900 PSI]

100 bar [1 450 PSI]

30

20

10

025 50 75 100

265.5

177

88.5

0

N.m [in.lbf]

200 bar [2 900 PSI]

100 bar [1 450 PSI]

X

Y

G2M1 M2

B

A

T1 T2 S

G1 R

M3M4Flow rate determination

Rotation Control Output Input

Clockwise (R) X A BY B A

Counter clockwise (L) X B AY A B

100% displacement cm3/rev [in3/rev] X/Y angle

20,5 [1.25] 13,5°25,7 [1.57] 17°28 [1.71] 18,5°

Control shaft torque at 3000 rpm Control shaft torque at 1500 rpm

The spring return feature in the control unit is not a safety device.


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Dimensions

63 [2

.48]

85 [3

.35]

93,5

[3.6

8]

103

[4.0

5]

Ø 18 [dia. 0.71] Ø 6 [dia. 0.24]

60,5[2.38]

See page 7 for other dimensions and port characteristics.


28 29/05/2017

Mechanical servo control with feed back

The variation in pump displacement is obtained by rotating the drive lever situated on the servo control. An internal channel, linked to the charge pump, feeds a hydraulic servo valve which supplies oil into the cylinder which is in turn linked to the pump swashplate.The maximum rotation of the Iever, with respect to 0 is 42,5° for both rotation directions; thus permitting the optimum control of the displacement.

At every lever angle there is a corresponding pump displacement. On the (T) return ’’arm’’ of the rotating distributor a restrictor (Rs) is mounted which regulates the servo control shifting speed, thus avoiding sudden accelerations and stoppages.

The effort of moving the lever is independent of the pressure and rpm.

2 51 2

A3 4 5

P M6 11107 8 9

3

2

1

-1

-2

-3

0

26.5

17.7

8.85

-8.85

-17.7

-26.5

0

10 20 30 40-40 -30 -20 -10

N.m [in.lbf]

0

S

M4M3

M1 M2G1

T1 T2

B

A

G2 RRs

42,5° max.

42,5

° max

.

X

Y

Flow rate determinationRotation Control Output Input

Clockwise (R) X A BY B A

Counter clockwise (L) X B AY A B

Control shaft rotation (degrees)

To prevent damage to the control A a positivemechanical stop must be provided for thecontrol A linkage.

Control lever torque vs Control leverrotation



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Dimensions

45[1.77]

50,5[1.99]

132,

5 [5

.21]

48[1

.89]

123,

5 [4

.86]

21,5[0.85]

90,5 [3.56]

15 [0.59]

26[1

.02]

166

[6.5

3]

3[0

.12]

3 x Ø 9 [dia. 0.35]

0-0.05Ø 12

[dia. 0.47 ] 0-0.002

48[1

.89]


Restrictor


30 29/05/2017

Hydraulic servo control

The variation in pump displacement is obtained by adjusting the pressure on the M3 and M4 servo control connections by means of a hydraulic proportional joystick (containing pressure reduction valves).

The joystick supply can by obtained by taking pressure from the auxiliary pump (G connection).

The servo control response time can be adjusted by inserting a restrictor on the joystick supply line (from 0.6 to 1,2 mm [from 0.02 to 0.05 in] or between the joystick and servo piston of the pump.

The servo control operation curve in both control directions goes from 6 to 15 bar [from 87 to 217 PSI]. The adjustment curve of the hydraulic control system has to be wider (from 5 to 16 bar [from 72.5 to 232 PSI]).

2 51 2

S3 4 5

P M6 11107 8 9

S

M4M3

M1 M2G1

T1 T2

B

A

G2 R

20

15

10

5

290

217.5

145

72.5

0 50 100

bar [PSI]

Flow rate determinationRotation Pressure Output Input

Clockwise (R) M3 B AM4 A B

Counter clockwise (L) M3 A BM4 B A

Pump displacement (%)

Restrictors



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Dimensions

118

[4.6

5]

91 [3.58]

48[1

.89]

48[1

.89]

90,5 [3.56]

91 [3.58]

10

[0.3

9]

M3

M4


Restrictor


32 29/05/2017

Electrical on-off servo control

Control with return spring

The reaching of the maximum displacement in a time defined by the restrictors (Rs) which are positioned between the electrovalve and the (T) drain is obtained by the continuous starting of an ON-OFF electrovalve with an open-circuit CETOP 3 connection.

If the electro-valve motion is stopped, the pump goes back to “0” position thanks to the servo control springs.

The pump can be supplied either without electrovalve (B00) or with electrovalve (B12, B24 ).

Control without return spring

The variation in pump displacement is obtained by the energizing of an ON-OFF electro-valve with a closed center CETOP 3 connection.

The displacement reached is in relation to the starting time of the electro-valve and to the diameter of the restrictors (Rs) which are placed between the electrovalve and the drain (T).

The pump can be supplied either without electrovalve (C00) or with electrovalve (C12, C24).

The servo control is without springs and the setting of the pump at a certain displacement is guaranteed by the closed center of the electrovalve.

2 51 2 3 4 5

P M6 11107 8 9

M3M4

T1 T2 S

M2

B

A

M1 G1 G2 R

M3M4

T1 T2 S

M2

B

A

M1 G1 G2 R

t a b p

EV2 EV1

Rs Rs

Rs Rs

2 51 2 3 4 5

P M6 11107 8 9

M3M4

T1 T2 S

M2

B

A

M1 G1 G2 R

M3M4

T1 T2 S

M2

B

A

M1 G1 G2 R

t a b p

EV2 EV1

Rs Rs

Rs Rs

Flow rate determinationRotation Control Pressure Output Input

Clockwise (R) EV1 A A BEV2 B B A

Counter clockwise (L) EV1 A B AEV2 B A B


Supply voltage

Without B00

12V B12

24V B24

Supply voltage

Without C00

12V C12

24V C24


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Dimensions

164,

4 [6

.47]

95 [3

.74]17

5,5

[6.9

1]

95 [3.74]

48[1

.89]

48[1

.89]

90,5 [3.56]

95 [3.74]

M3

M4

38,5 [1.51]

EV1

EV2

EV1 EV2

See page 7 for other dimensions and port characteristics.Type of connector: DIN 43650

Restrictor

Restrictor

CETOP 3

B00 and C00


34 29/05/2017

Electrico-proportional servo control

By means of a potentiometer and a control card, a voltage signal is applied to the proportional electrovalve coils which adjust the pressure of the servo control connected to the pump swashplate.

At every position of the potentiometer lever, there is a corresponding swashplate position.

The flow rate direction depends on which coil is excited.

The adjustment speed can be controlled by ramps installed on the card and by restrictors (Rs) positioned between the electrovalve and the servo control.

2 51 2 3 4 5

P M6 11107 8 9

G1M1 M2

B

A

T1 T2 S

M3M4

G2 R

EP2

Rs

EP1

Rs

600

800

1000

1200

1400

0 50 100

300

400

500

600

700


Clockwise (R) EP1 B AEP2 A B

Counter clockwise (L) EP1 A BEP2 B A

Pump displacement (%)

Cur

rent

(mA

) (12

V)

Cur

rent

(mA

) (24

V)

The current must not exceed 1500 mAunder 12V and 800 mA under 24V.


Supply voltage

12V P12

24V P24


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Dimensions

165,

5 [6

.51]

48[1

.89]

48[1

.89]

43[1.69]

68 [2

.68]

68,4

[2.6

9]

90,5 [3.56]

M3

M4

EP1

EP2

EP1 EP2


Type of connector: DIN 43650

Restrictor

Restrictor


36 29/05/2017

Hydraulic automotive control

In relation to the input rotation rate, the pump swashplate positioning cylinder is actuated by the pressure of the adjustment valve and a 4/3 electro-hydraulic valve, progressively positioning the swashplate. This provides a continuously variable pump displacement. The direction of the supplied flow is determined by which of the two solenoids is energized.The pilot pressure increases proportionally to the rotation plate. A pump displacement increase corresponds to the higher pilot pressure.In case the prime mover is overloaded, the rotation rate decreases and the pilot pressure is reduced causing a pump displacement reduction with a corresponding drop in absorbed power.An "Inching" lever (option IC) is available to reduce the pilot pressure independently of the pump rotation speed. The hydraulic automotive control is also available with an hydraulic inching (HI). For that the port K must be connected to a pressure reducer valve ( see page 42).

2 51 2 3 4 5

P M6 11107 8 9

M3M4

T1 T2 S

M2

B

A

M1 RG1 G2D

IC

Rs1Rs2

EV2 EV1


Clockwise (R) E1 B AE2 A B

Counter clockwise (L) E1 A BE2 B A

IC= Mechanical inching

Supply voltage

12V D12

24V D24


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Dimensions with option IC

164,

4 [6

.47]

71 [2

.80]

175,

5 [6

.91]

134 [5.27]

48[1

.89]

48[1

.89]

90,5 [3.56]

95 [3.74]

M3

M4

38,5 [1.51]

EV1

EV2

EV1 EV2

45[1.77]

84,75 [3.34]15,25[0.60]

15[0.59]

94 [3

.70]

3[0

.12]

3 x Ø 9 [dia. 0.35]

Mechanical inching lever


Restrictor Restrictor

Port K


38 29/05/2017


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OOPTIONSRoller bearing

It is an optional high capacity bearing.

Depending on the characteristics of shaft load, the duty cycle of the application and the expected life time of your application, Roller bearing might be needed.

Consult your Poclain Hydraulics Application Engineer.

Fluorinated elastomer seals

Standard NBR sealing are designed to resist to temperature up to 90°C [194°F] and to HV type oils.

If your application is outside these limits, Fluorinated elastomer seals might be recommended.

Consult your Poclain Hydraulics Application Engineer.

UNF threads ports

2 51 2 3 4 5

P M6

CR11107 8 9

2 51 2 3 4 5

P M6 11

EV107 8 9

Port Function ISO 11926-1A-B Services 1 1/6-12-UNFG Auxiliary 9/16-18-UNFM1/M2 Gauge 9/16-18-UNFM3/M4 Servo control pilot 9/16-18-UNFS Suction 1 1/6-12-UNFT1/T2 Drain 3/4-16-UNF

T1 S

M1

G2M2

T2

G1R

B

M4

A

M3

2 51 2 3 4 5

P M6 11

FU107 8 9


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Filter on pressure line

The PM25 pumps can have a pressure filter without clogging indicator (F0) or with clogging indicator (F2). The flow thru the filter is only the flow that entry in the close loop. The filter fitness is of 10 micron.

The max. working pressure is 30 bar [435 PSI].

Maximum pressure difference between filter cartridge input and output is 2 bar [29 PSI]. When reaching 2 bar [29 PSI], the cartridge has to be changed.

Tightening torque: 35 Nm [309 in.lbf].

F0 Without clogging indicator F2 With clogging indicator

2 51 2 3 4 5

P M6 11107 8 9

115,

5 [4

.55]

94,5 [3.72]

M3

M4

M2

G2

G1

M1

150

[5.9

0]

Ø 6

2 [d

ia. 2

.44]

142

[5.5

9]

35 [1.38]

M1

M3M4

M2G2G1

T1 T2 S

A

B

M1

M3M4

M2G2G1

T1 T2 S

A

B

NC

2 bar [29 PSI]

12

1 2

Clogging indicator

Normally closed contact.Thread of the clogging indicator is internally connected to ground.

Clogging indicator specificationDifferential working adjustment

3 ± 0,2 bar[44 ± 3 PSI]

Working temperature -30°C ~ 110 °C[-22°F ~ 230°F]

Max. vibration level 50 g

Connector type AMP super seal, 2 way

Current range 0,1-0,2 A max.


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The function of the cut-off valve is to avoid that the pump absorbed power exceeds the machine engine power.The cut-off valve is connected to A and B piston pump’s high pressure lines and is usually set at 20 to 30 bar [290 to 435 PSI] lower thanthe maximum relief valve of the closed circuit.The cut-off valve acts on the servo control operating pressure in order to reduce the pump displacement and the adsorbed power.

External connections for filter

Pressure cut-off valve

Max deep of the nipples for the connections M1-M2 andG1-G2-R must be 10 mm.

2 51 2 3 4 5

P M6

F311107 8 9

11 [0.43] 11 [0.43]

33 [1

.30]

11,5

[0.4

5]

33 [1

.30]

11,5

[0.4

5]

M2

G2

M6

M3M4

M5M1G1G2

A

B

M2

T1T2S

Rs1Rs2

RC

M1

R

G1

C

G1 = to filter on lineG2 = Return from filter on line

2 51 2 3 4 5

P M6

LP11107 8 9

0.8

S

M4M3

M1 M2G1

T1 T2

B

A

G2 R

113

[4.4

5]

M2

G2

G1

M1

R

XView X

Pressure cut-off setting


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For hydraulic automotive control D. An "Inching" lever is available to reduce the pilot pressure independently of the pump rotation speed.See Hydraulic automotive control (D) page 36.

Mechanical inching

Hydraulic inching

2 51 2 D12

34 5

P M6

IC11107 8 9

D24or

2 51 2 D12

34 5

P M6

HI11107 8 9

D24or

For hydraulic automotive control D is available an hydraulic inching HI that consist in a connection K on the pump body to be connect witha pressure reducer valve (for example brake pedal VB002 or VB012). See hydraulic automotive control (page 36).

M1 G1 G2

A

B

K

M3M4

BH

D

T1T2

R M2

S

Rs1Rs2

C

M1

R KRs1

G2

M2

C T1

G1

49

61.5[2.42]

[1.6

5]

Port Function ISO 1179-1K External servo pilot 1/8’’ GAS

Towards hydraulicjoystick

From hydraulicjoystick


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Neutral position switch

For the control A it is possible to obtain a micro switch to avoid the start of the engine if the lever of the control is not in center(zero position).

2 51 2 3 4 5

P M6

MI11107 8 9

M2

G2

G1

M1

R

S

M4M3

M1 M2G1

T1 T2

B

A

G2 RRs

50,5[1.99]

117,

5 [4

.62]

101 [3.98]

Type of connector: Deutsch DT04-2P


44 29/05/2017

Flushing valve

inside the pump cover, a purge valve can be fitted with discharge inside the pump casing by means of a calibrated hole. The exchange valve isuseful in case the temperature of the oil in the closed circuit is too high.

Finishing coat

The pumps can be delivered with finishing coat when requested. Standard paint is RAL 9005 (black color).

2 51 2 3 4 5

P M6

VS11107 8 9

B

A

ST1 T2

M4M3

M1 M2G1 G2 R

112

[4.4

1]

M2

G2

G1

M1

R

X

2 51 2 3 4 5

P M6

PA11107 8 9

Consult your Poclain Hydraulics application engineer for other colors of topcoat.


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Customized identification plate

It is possible to provide our products with dedicated plate (your part number engraved on the plate) when requested.

Anti-stall valve

SD option consists of a block valve (same body as automotive valve) which provide a pressure signal for the servo piston of the pump related to the speed of engine. In case of engine overload and consequent rpm reduction the SD valve reduces the pressure for the servo piston and the pump de-stroke consequentially with an anti-stall effect.

2 51 2 3 4 5

P M6

DP11107 8 9

This option is available only for minimum volume of 50 pieces.

Consult your Poclain Hydraulics application engineer for other possibilities.

2 51 2 3 4 5

P M6

SD11107 8 9

For application of this option please contactyour Poclain Hydraulics application engineer.


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www.poclain-hydraulics.com

Poclain Hydraulics reserves the right to make any modifications it deems necessary to the products described in this document without prior notification.The information contained in this document must be confirmed by Poclain Hydraulics before any order is submitted.Illustrations are not binding.The Poclain Hydraulics brand is the property of Poclain Hydraulics S.A.

29/05/2017

A35767C

pm25 pump - poclain · pdf fileinlet pressure charge pump inlet pressure is key for acceptable...

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