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Service Manual

Eaton® DuraForce™ HMR

2 EATON Duraforce HMR Service Manual E-MOPI-TS012-E July 2012

Content Page #

Table of Contents

Maximum Displacement Adjustment Procedure for HMR Motors

Set Up and Procedure 3

Minimum Displacement Adjustment Procedure for HMR Motors


Adjusting Crossover Relief Valves on HMR Motors


Regulation Begin Adjustment Procedure for HMR Motors

Set Up 6

Procedure to Adjust Regulation Begin Pressure for "R", "H" and "L" Controls Only 7

Procedure to Adjust Regulation Begin Pressure for "PR**-R" Controls Only 7

Environmental Concerns

Protection of the natural fundamentals of life is one of our predominant tasks. We are continuously improving the protection of the environment as far as applications are concerned. We encourage you to contribute your share to comply with this demand. In connection with work to be performed, the environmental regulations of the machine manufacturer must be respected.

In general:

• Greases and oils which cannot be used any more have to be collected. They are normally a threat to water reserves and must be kept away from the environment.

• Adhere to national and local regulations for waste disposal.

Important

You have been provided information on the conversion of DuraForce products. Proper application of the information requires specific training and may require use of specialized tooling and equipment. All requests for training must be coordinated through your Eaton Account Manager. He can also provide you price and availability of any specialized tooling. If you choose to proceed with the conversion of the DuraForce products absent the necessary training and/or these specialized tools, you do so at your risk.

Eaton will accept no claim for warranty resulting from deficiencies in the conversion. Please refer to the Eaton literature web site for warranty information at www.eaton.com/hydraulics/warranty.

3EATON Duraforce HMR Service Manual E-MOPI-TS012-E July 2012

Rear-PortedHMR

Side-PortedHMR

MaximumDisplacementAdjustment(see note #1)

AdjustmentStud (Typical)

Seal Nut (Typical)

MaximumDisplacementAdjustment(see note #1)

Maximum Displacement Adjustment Procedure for HMR MotorsSet Up and Procedure

Tools / Equipment Required

• 6mm Allen wrench

• 19mm closed-end wrench

Procedure for Adjusting the HMR Maximum Displacement

Start the prime mover and adjust it to operating speed.

Actuate the HMR per the requirements stated in "Note #3".

To Adjust the Motor Maximum Displacement:

a. Hold the adjustment stud stationary with the 6mm Allen Wrench.

b. Loosen the seal nut with the 19mm wrench.

c. Turn the adjustment stud IN to decrease the maximum displacement or turn it OUT to increase the maximum displacement.

d. Once the desired maximum displacement has been acquired, hold the adjustment stud stationary with the 6mm Allen wrench and tighten the seal nut with the 19mm wrench. The proper torque for the seal nut is 60 N-m (44 ft-lb).

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Note #1

All "side-ported" HMR motors have a maximum displacement adjustment. But NOT all "rear-ported" HMR motors have a maximum displacement adjustment. Depending on the specific configuration of your motor, it may or may not have a maximum displacement adjustment. For those HMR motors without a maximum displacement adjustment, please ignore this Service Bulletin.

Note #3

The HMR motors auto-matically default to minimum displacement unless:

• The motor is loaded beyond the regulation begin setting in which case the motor automatically shifts to maximum displacement then de-strokes to a displacement to accommodate the torque requirement (i.e. as the load pressure drops).

• Control pressure is supplied into the displacement override port thus forcing the HMR to maximum displacement.

Prior to adjusting the HMR maximum displacement, you must either:

• Provide means to supply control pressure into the displacement override port.

• Load the motor to create and maintain a pressure greater than the regulation begin setting being careful NOT to open the cross-over relief valves (if available).

Size 55 75 105 135 165

Max Displacement 54.8 75.9 105.0 135.6 165.0 Limit (CC) Continuous Max Speed at Max Speed Displacement 4100 3800 3500 3200 3100 (RPM) Continuous Max Speed at Min Displacement 4700 4400 4100 3700 3500

Note #2

The following table illustrates the maximum displacement limits and the maximum allowable rotational speeds for Both Max. and Min. displacements.


Rear-PortedHMR

Side-PortedHMR Minimum

DisplacementAdjustment

AdjustmentStud (Typical)

Seal Nut (Typical)

MinimumDisplacementAdjustment

Minimum Displacement Adjustment Procedure for HMR MotorsSet Up and Procedure



• 19mm closed-end wrench

Procedure for Adjusting the HMR Minimum Displacement

Note To properly adjust the minimum displacement of the HMR motor, it is preferable that the motor free-spin while making the adjustment - This would insure that the motor was at minimum displacement.If this is not possible, then the HMR must be completely unloaded when making the minimum displacement adjustment to insure that it is at minimum displacement.


Actuate the HMR motor under no load to insure it is at minimum displacement.

NoteThe HMR motor automatically defaults to minimum displacement unless:• The motor is loaded beyond the regulation begin setting in

which case the motor automatically shifts to a displacement to accommodate the torque requirement.

• Control pressure is supplied into the displacement override port thus forcing the HMR to maximum displacement.

To Adjust the Motor Minimum Displacement:

a. Hold the adjustment stud stationary with the 6mm Allen Wrench.

b. Loosen the seal nut with the 19mm wrench.

c. Turn the adjustment stud IN to increase the minimum displacement or turn it OUT to decrease the minimum displacement.

d. Once the desired minimum displacement has been acquired, hold the adjustment stud stationary with the 6mm Allen wrench and tighten the seal nut with the 19mm wrench. The proper torque for the seal nut is 60 N-m (44 ft-lb).

Note The following table illustrates the recommended minimum displacements and allowable rotational speeds for both Max. and Min. displacement. The HMR motors should NOT be operated at higher speeds if the recommended displacements are used, unless specifically approved by Eaton Engineering. If higher rotational speeds are required for your application, you must consult Eaton Engineering for the required minimum displacement setting.

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Size 55 75 105 135 165

Min Displacement 18.3 25.3 35.0 45.2 55.2 Limit (CC) Continuous Max Speed at Max Speed Displacement 4100 3800 3500 3200 3100 (RPM) Continuous Max Speed at Min Displacement 4700 4400 4100 3700 3500


Adjusting Crossover Relief Valves on HMR MotorsSet Up and Procedure

Important

All supplemental relief valves used in the same circuit as the VD20-04 Single-Setting Relief Valves must be set higher than the desired setting for the VD20-04 relief valves. This must be done prior to performing the steps in this Service Bulletin.

Install the pressure gauge or transducer to measure the pressure at Workport "A".

The function that the HMR motor actuates must be locked as to prevent the HMR motor from rotating. This will force oil to pass over the relief valve once oil is supplied to the HMR motor.

Supply flow to Workport "A". Only supply the maximum flow that the motor will receive during normal operation.

Important

When pushing oil past the relief valve as described in step #3, the hydraulic oil and relief valve will heat up rapidly. Therefore, limit the timing in step #3 to 30 seconds or less. You should monitor the temperature of the hydraulic oil and HMR motor to ensure that they do NOT exceed 194°F (90°C). If the temperature of either reaches this maximum limit, stop all testing until the temperature cools off.

While supplying flow to Workport "A", read the pressure on the gauge - This is the setting for the Workport "A" Relief Valve.

To adjust the Workport "A" Relief Valve pressure setting:

a. Refer to the illustrations above to make sure you are working on the correct relief valve.

b. Hold the Adjustment Stud stationary with the 5mm Allen wrench, and loosen the Seal Nut with the 17mm wrench.

c. Turn the Adjustment Stud IN to increase the relief valve pressure setting or OUT to decrease the relief valve pressure setting.

d. Once the desired pressure setting has been acquired, hold the Adjustment Stud stationary and tighten the Seal Nut. The proper torque for the Seal Nut is 60 N-m (44 ft-lb).

Then repeat steps #1 through #5 for Workport "B".

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• 17mm wrench

• 0-7000 psi pressure gauge or transducer

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Regulation Begin Adjustment Procedure for HMR MotorsSet Up

Important

The regulation begin setting must be set at least 300 psi less than the settings on any crossover relief valves used with the HMR to avoid premature cracking of the relief valves or interaction with the relief valves.


Note Due to slight differences in the HMR controls, several tools will be specified to insure that you have all tool combinations that may be required.

• 17mm wrench

• 13mm wrench

• 6mm wrench


• 0-7000 psi pressure gauge (optional: 0-7000 psi transducer)

• 0-3000 psi pressure gauge (optional: 0-3000 psi transducer)

Note All HMR controls are interchangeable with each other - Each control can be mounted to any configuration HMR motor. The following information is specific to the type of motor control used. Therefore, when using this Service Bulletin, use the procedure that corresponds to the control you have on your motor.

Port "Y1"(Typical)

("PR**-R" control type)

Workport"B"

Workport "B"Workport "A"

AG

HMR

Adjustment Stud(Typical)

Locking Nut(Typical)

Workport"A"

Adjustment

Regulation("R", "H", "L" control types)

HMRBegin

Solenoid "M1"Solenoid "M2"


Regulation Begin Adjustment Procedure for HMR MotorsProcedures

Procedure to Adjust the Regulation Begin Pressure for "R", “H” and “L” Controls ONLY :

Install a 0-3000 psi pressure gauge into port "Y1".

Install a 0-7000 psi gauge to read either workport "A" or "B", whichever is the easiest to gain access to.


Load the motor such that the pressure slowly increases up to the desired regulation begin pressure

Note If no means are available to slowly increase the load, then you must lock or pin the motor to keep it from rotating.

As the pressure increases, monitor both pressure gauges. Record the workport pressure when the pressure at "Y1" just begins to decrease - This is the regulation begin pressure.

. To Adjust the Regulation Begin Pressure:

a. Hold the adjustment stud stationary.

b. Loosen the locking nut.

c. Turn the adjustment stud IN to increase the regulation begin setting or turn it OUT to decrease it.

d. Once the desired regulation begin setting is acquired, hold the adjustment stud stationary and tighten the locking nut.

Stop the prime mover and remove all gauges.

Procedure to Adjust the Regulation Begin Pressure for "PR**-R” Controls ONLY :

Install a 0-3000 psi pressure gauge into port "Y1".

Install a 0-7000 psi gauge to read either workport "A" or "B", whichever is the easiest to gain access to.

Use the sketches on page #6 to note which workport you are taking a pressure reading from. It is critical for the adjustment of "PR**-R" Controls.

For Rear-Ported Motors ONLY:

• If reading pressure from workport "A", Solenoid "M2" must be de-energized when making the regulation begin adjustment/measurement.

• If reading pressure from workport "B", Solenoid "M2" must be energized when making the regulation begin adjustment/measurement.

For Side-Ported Motors ONLY:

• If reading pressure from workport "A", Solenoid "M2" must be energized when making the regulation begin adjustment/measurement.

• If reading pressure from workport "B", Solenoid "M2" must be de-energized when making the regulation begin adjustment/measurement.


Load the motor such that the pressure slowly increases up to the desired regulation begin pressure (Note: Load the side of the motor that you are measuring workport pressure at).

Note If no means are available to slowly increase the load, then you must lock or pin the motor to keep it from rotating.

As the pressure increases, monitor both pressure gauges. Record the workport pressure when the pressure at "Y1" just begins to decrease - This is the regulation begin pressure.

To Adjust the Regulation Begin Pressure:

a. Hold the adjustment stud stationary.

b. Loosen the locking nut.

c. Turn the adjustment stud IN to increase the regulation begin setting or turn it OUT to decrease it.

d. Once the desired regulation begin setting is acquired, hold the adjustment stud stationary and tighten the locking nut.

Stop the prime mover and remove all gauges.

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EatonHydraulics Group USA14615 Lone Oak RoadEden Prairie, MN 55344USATel: 952-937-9800Fax: 952-294-7722www.eaton.com/hydraulics

EatonHydraulics Group EuropeRoute de la Longeraie 71110 MorgesSwitzerlandTel: +41 (0) 21 811 4600Fax: +41 (0) 21 811 4601

Eaton Hydraulics Group Asia PacificEaton BuildingNo.7 Lane 280 Linhong Road Changning District, Shanghai200335 ChinaTel: (+86 21) 5200 0099Fax: (+86 21) 2230 7240

© 2012 Eaton CorporationAll Rights Reserved Printed in USADocument No. E-MOPI-TS012-EJuly 2012

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