Bench Test Procedure for Hydraulic Piston Motors{4351, 5058} Caterpillar


Bench Test Procedure for Hydraulic Piston Motors{4351, 5058}

Usage:

631E 1BB
Cold Planer:
PR-1000C (S/N: 5XC154-UP)
PR-750B (S/N: 8AC1-UP)
PR-750C (S/N: 7CK1-UP)
Integrated Toolcarrier:
IT14G (S/N: FWL1-UP; 8ZM1-568; KZN1-UP; 1WN1-UP)
Paving Compactor:
CS-563 (S/N: 8XF1-UP; 7GG1-UP)
CS-573 (S/N: 8PK1-UP)
CS-583 (S/N: 8YJ1-UP; 1EL1-UP)
PS-130 (S/N: 7ND1-UP)
Vibratory Soil Compactor:
CP-563 (S/N: 1YJ1-UP; 5AJ1-UP)
Track-Type Loader:
963C (S/N: BBD1-UP; 2DS1-UP)
973C (S/N: BCP1-UP; 3RZ1-UP)
Compact Wheel Loader:
914G (S/N: PDF1-UP; 7ZM1-UP; 9WM1-UP)
Wheel Tractor-Scraper:
631E Series II (S/N: 1BB1-UP)
631G (S/N: CMT1-UP; AXZ1-UP)
637E Series II (S/N: 1HB1-UP; 7CB1-UP)
637G (S/N: AWE1-UP; CEJ1-UP; CEM1-UP; AYN1-UP)

Introduction

Table 1
Revision     Summary of Changes in REHS1837    
03     Added ""Canceled Part Numbers and Replaced Part Numbers" " section to document.    
Added REHS1761 "Required Tooling for Bench Testing Hydraulic Components" to ""References" " section of document.

© 2012 Caterpillar All Rights Reserved. This guideline is for the use of Caterpillar Dealers only. Unauthorized use of this document or the proprietary processes therein without permission may be violation of intellectual property law.

This Special Instruction includes test procedures for piston pumps. This Special Instruction also provides specifications. The technician should have a good understanding of hydraulic piston pumps. The technician should be educated in the operation of the hydraulic test bench. The test benches in this document are available through the Caterpillar Service Tool Division. Gather all necessary tooling before you need to hook up the pump. Some of the required tooling appears in a table at the end of this document. There are many possible variations of tooling that could be used. Not every possible variation can be listed.

For questions or additional information concerning this guideline, submit a feedback form in the Service Information System website. In order to address an urgent need, use the following to relay your request to Caterpillar Repair Process Engineering:

  • Cat Dealer Technical Communicator

  • Dealer Solution Network

  • Cat Technical Representative

  • Knowledge Network (online)

Canceled Part Numbers and Replaced Part Numbers

This document may not include all Canceled part numbers and replaced part numbers. Use NPR on SIS for information about Canceled part numbers and replaced part numbers. NPR will provide the current part numbers for replaced parts.

Safety

------ WARNING! ------

Personal injury or death can result from improperly checking for a leak.

Always use a board or cardboard when checking for a leak. Escaping air or fluid under pressure, even a pin-hole size leak, can penetrate body tissue causing serious injury, and possible death.

If fluid is injected into your skin, it must be treated immediately by a doctor familiar with this type of injury.

----------------------

------ WARNING! ------

Hot oil and hot components can cause personal injury. Do not allow hot oil or hot components to contact skin.

----------------------

------ WARNING! ------

Pump test pressures in this guideline may exceed the normal operating range of the hydraulic test hoses utilized when connecting the tested pump to the test bench. However, the order of magnitude of these pressures is significantly below the burst strength of the Caterpillar "XT6" product.

High pressure oil can escape through improperly assembled hoses and fittings. High pressure oil can also escape through poorly maintained hoses and fittings. High pressure oil may also leak through hose that has become damaged over the life of the hose due to the pressure levels that occur during test bench operation.

Personal injury or death can result from improper hose & fitting inspection or improper hose replacement procedures. Escaping fluid under pressure can penetrate body tissue causing serious injury, and possible death.

Thoroughly inspect all testing hoses, fittings, and quick disconnects prior to any testing operation. Check the assembly date tag or hose assembly log date for a hose life indicator. Replace all Test Bench hoses at a minimum of every 2 years or earlier if the hose or fittings appear to be damaged.

----------------------

Summary

This procedure is specific to the type of pump and the type of control. Refer to the test specifications and the tooling at the end of this document.

Note: A paper copy of this document may not be the latest version. Go to the Service Information System (SIS) in order to view the latest version.

References

Table 2
References    
Media Number     Title    
REHS1761     Required Tooling for Bench Testing Hydraulic Components    
SEBF8810     Hydraulic Pump, Motor, and Cylinder Bench Test Procedure Reference Manual    
SEHS8892     Operating Instructions for Caterpillar 1U-9400 Series Hydraulic Test Center    
NEHS0563     Tool Operating Manual for 9U-5000 Series Hydraulic Test Bench    

Connections for the Caterpillar Hydraulic Test Center




Illustration 1g01036452

Connections for the Test Center

(1) "F3" flow meter inlet

(2) "F3"outlet for the flow meter with pressure control

(3) Signal pressure

(4) Oil supply from the auxiliary pump

(5) Return to tank




Illustration 2g01037347

Control and Gauges for the Test Center

(6) Control for signal pressure

(7) "F3" discharge flow

(8) "F3" Load control for discharge pressure

Connections for the Caterpillar Hydraulic Test Bench




Illustration 3g01037348

(9) "Flow meter 1" loop and "Flow meter 2" loop




Illustration 4g01037349

(10) "Flow meter 2" outlet

(11) Signal pressure line

(12) "Flow meter 2" inlet

(13) "Flow meter 1" inlet




Illustration 5g01089470

(14) Control for signal pressure

(15) "Flow meter 2" discharge flow

(16) "Flow meter 2" load control

Port Locations




Illustration 6g01045999

Typical port locations and adjustments

(17) Case drain ports

(18) Adjustment screw for minimum angle

(19) Pressure port for displacement control

(20) Work ports

(21) Adjustment screw for maximum angle




Illustration 7g01440696

Hydraulic Schematic

(17) Case drain ports

(18) Adjustment screw for minimum angle

(19) Pressure port for displacement control

(20) Work ports

(21) Adjustment screw for maximum angle

Motor Pre-Test Set Up

  1. Connect a hose from an auxiliary oil supply to a work port (20) .

  1. Connect a hose from the other work port (20) to a flow meter inlet.

  1. Connect the outlet of the flow meter to the tank on the test bench.

  1. Connect a hose from the signal pressure line on the test bench to the pressure port for displacement control (19) on the motor.

  1. Connect an in-line flow meter to case drain port (17). Direct the oil to the sump on the test bench .

  1. The use of 1U-6602 Photo-Tachometer is necessary. The use of the Photo-Tachometer will be necessary to verify the RPM of the output shaft. Attach a piece of reflective tape to the output shaft of the motor.

Test Procedure

Note: The oil in the test bench should be one of the following.

  • SAE 10W at 50 °C (122 °F) or

  • Mobil DTE-11 at 46 °C (115 °F)

  1. Use an auxiliary pump on your test bench to start rotating the motor according to Step 1 of the test specifications. Listen for abnormal noise. Verify that all the connections are not leaking. Check for leaks around shaft seals and control valves.

    Run the motor for at least 5 minutes in order to raise the temperature of the oil and purge the system of air.

  1. Increase the flow rate into the motor. Use the load control for the flow meter (16) in order to set the back pressure on the output flow of the motor according to Step 2 of the test specifications. Adjust the back pressure and the auxiliary pump pressure in order to make sure that the input flow to the pump is correct. The motor should be at slow speed. Check the motor RPM. If the RPM of the output shaft for the motor are not within specifications, adjustment is necessary. To decrease speed, loosen the locknut and turn the adjustment screw for maximum angle (21) counterclockwise. To increase speed, turn the adjustment screw for maximum angle (21) clockwise.

    Note: For part number 111-0364 Step 3 must be modified. This motor has a minimum angle of 0°. Verify the control pressure when the motor begins to accelerate. Then stop the motor. Increase the control pressure that would put the motor at maximum speed. Attempt to put flow into the motor. The motor should be completely destroked. The motor should not turn.

  1. Apply control pressure into the pressure port for displacement control (19) according to Step 3 of the test specifications. The motor should be at maximum speed. Check the motor RPM. If the RPM of the output shaft of the motor is not within specifications, adjustment is necessary. To decrease speed, loosen the locknut. Turn the adjustment screw for minimum angle (18) clockwise. To increase speed, turn the adjustment screw for minimum angle (18) counterclockwise.

    Note: Some pumps shift at a certain pressure while other pumps shift over a pressure range. For motors that shift over a pressure range, verify the control pressure when the RPM for the output shaft of the motor increases. Also verify the control pressure when the RPM for the output shaft of the motor reaches maximum speed. These ranges are provided in the test specifications.

Test Specifications

Table 3
Part Number     Step     RPM     Back pressure kPa (psi)     Input Flow Lpm (gpm)     Control Pressure kPa (psi)    
111-0364     1     707     0     114 (30)     0    
2 1061     1724 (250)     151 (40)     0    
3 0     1724 (250)     151 (40)     500 (73) - (1)    
( 1 ) Adjust the set screw for the minimum angle 20.7 mm (0.8150 inch).

Table 4
Part Number     Step     RPM     Back pressure kPa (psi)     Input FlowLpm (gpm)     Control Pressure kPa (psi)    
127-8335     1     568     0     114 (30)     0    
2 757     1724 (250)     151 (40)     0    
3 1165     1724 (250)     151 (40)     2400 (348)    

Table 5
Part Number     Step     RPM     Back pressure kPa (psi)     Input FlowLpm (gpm)     Control Pressure kPa (psi)    
151-1244     1     454     0     114 (30)     0    
2 605     1724 (250)     151 (40)     0    
3 1826     1724 (250)     151 (40)     800 (116) - 1600 (232)    

Table 6
Part Number     Step     RPM     Back pressure kPa (psi)     Input FlowLpm (gpm)     Control Pressure kPa (psi)    
168-1837 (1)     1     707     0     76 (20)     0    
2 707     1724 (250)     76 (20)     0    
3 1327     1724 (250)     38 (10)     500 (73) - 2000 (290)    
( 1 ) for use on model 9ZM (914G) when equipped with 168-1836 conversion arrangement

Table 7
Part Number     Step     RPM     Back pressure kPa (psi)     Input FlowLpm (gpm)     Control Pressure kPa (psi)    
168-1837 (2)     1     707     0 (0)     76 (20)     0    
2 707     1724 (250)     76 (20)     0    
3 1763     1724 (250)     38 (10)     500 (73) - 2000 (290)    
( 2 ) For use on model 1WN (IT14G) when equipped with 168-1838 conversion arrangement

Table 8
Part Number     Step     RPM     Back pressure kPa (psi)     Input FlowLpm (gpm)     Control Pressure kPa (psi)    
175-6469     1     339     0     114 (30)     0    
2 452     1724 (250)     151 (40)     0    
3 1377     1724 (250)     151 (40)     800 (116) - 1600 (232)    

Table 9
Part Number     Step     RPM     Back pressure kPa (psi)     Input FlowLpm (gpm)     Control Pressure kPa (psi)    
187-3453     1     454     0     114 (30)     0    
2 605     1724 (250)     151 (40)     0    
3 1826     1724 (250)     151 (40)     800 (116) - 1600 (232)    

Table 10
Part Number     Step     RPM     Back pressure kPa (psi)     Input FlowLpm (gpm)     Control Pressure kPa (psi)    
187-3454     1     339     0     114 (30)     0    
2 452     1724 (250)     151 (40)     0    
3 1377     1724 (250)     151 (40)     800 (116) - 1600 (232)    

Table 11
Part Number     Step     RPM     Back pressure kPa (psi)     Input FlowLpm (gpm)     Control Pressure kPa (psi)    
196-3638     1     454     0     114 (30)     0    
2 605     1724 (250)     151 (40)     0    
3 1826     1724 (250)     151 (40)     800 (116) - 1600 (232)    

Table 12
Part Number     Step     RPM     Back pressure kPa (psi)     Input FlowLpm (gpm)     Control Pressure kPa (psi)    
196-4702     1     454     0     114 (30)     0    
2 605     1724 (250)     151 (40)     0    
3 1826     1724 (250)     151 (40)     800 (116) - 1600 (232)    

Table 13
Part Number     Step     RPM     Back pressure kPa (psi)     Input FlowLpm (gpm)     Control Pressure kPa (psi)    
196-4703     1     339     0     114 (30)     0    
2 452     1724 (250)     151 (40)     0    
3 1377     1724 (250)     151 (40)     800 (116) - 1600 (232)    

Test Bench Tooling

Table 14
Part Number     Mounting Flange     Split Flange     Flange Adapter     Pressure Port for Destroke     Case Drain    
111-0364     1U-9129     1P- 5766     9U- 7439     9/16-18 UNF     1 1/16-12 UNF    
127-8335     1U-9129     1P- 5767     9U- 7440     9/16-18 UNF     1 1/16-12 UNF    
151-1244     1U-9129     1P- 5767     9U- 7440     9/16-18 UNF     7/8-14 UNF    
168-1837     1U-9129     1P- 5766     9U- 7439     9/16-18 UNF     1 1/16-12 UNF    
175-6469     130-1986     5P- 8077     9U- 7439     9/16-18 UNF     1 5/16-12 UNF    
187-3453     1U-9129     1P-5766     9U-7440     9/16-18 UNF     7/8-14 UNF    
187-3454     1U-9129     5P- 8077     9U-7441     9/16-18 UNF     1 5/16-12UNF    
196-3638     1U-9129     1P- 5767     9U- 7440     9/16-18 UNF     7/8-14 UNF    
196-4702     1U-9129     1P- 5767     9U- 7440     9/16-18 UNF     7/8-14 UNF    
196-4703     1U-9129     5P- 8077     9U- 7441     9/16-18 UNF     1 5/16-12 UNF    

Caterpillar Information System:

3508B Engine for Caterpillar Built Machines Coolant Flow
247B, 257B, 267B, 277B and 287B Multi Terrain Loaders and 216B, 226B, 232B, 236B, 242B, 246B, 248B, 252B, 262B and 268B Skid Steer Loaders Auxiliary Hydraulic Electronic Control System MID 106 - CID 1695 - FMI 04
3508B Engine for Caterpillar Built Machines Automatic Altitude Compensation
M325D L MH and M325D MH Material Handlers Hydraulic System Service Brake Control Valve
3508B Engine for Caterpillar Built Machines Air Filter Restriction
446D Backhoe Loader Axles, Differential and Brakes Drive Shaft
M325D L MH and M325D MH Material Handlers Machine System Boom Cylinder Lines - Material Handler-Right Hand
M325D L MH and M325D MH Material Handlers Machine System Boom Cylinder Lines - Material Handler-Left Hand
CP-533E and CS-533E Vibratory Soil Compactors Stopping the Engine if an Electrical Malfunction Occurs
2004/03/15 Updated Fuel Tank Caps Are Now Available {1273}
CP-533E and CS-533E Vibratory Soil Compactors Parking Brake Manual Release
3126B Machine Engines E053 Low Fuel Pressure Warning
914G2 and IT14G2 Compact Wheel Loaders Bucket Linkage and Loader Cylinder Bearings - Lubricate
R2900G Load Haul Dump Hydraulic System Lift and Tilt Cylinder Drift - Check
R2900G Load Haul Dump Hydraulic System Lift and Tilt Cylinder Speed - Check
R1300G Load Haul Dump Power Train Trunnion Support (Oscillating Axle, Front) - Install
R2900G Load Haul Dump Hydraulic System Machine Preparation for Troubleshooting
R2900G Load Haul Dump Hydraulic System Lift Arm Positioner - Adjust
R1300G Load Haul Dump Power Train Transmission Output from Transmission - Separate
R2900G Load Haul Dump Power Train Screen (Torque Converter)
2003/12/22 Updated Fuel Tank Caps are Now Available {1273}
3508B Engine for Caterpillar Built Machines Crankcase Pressure
HF181, HF201 and HF221 Felling Heads Disc Saw Performance - Test and Adjust
3508B Engine for Caterpillar Built Machines Engine Oil Pressure
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.