VALVE GP-RELIEF 1163805 - Caterpillar

Table 1
Required Tools    
Part Number     Description     Quantity    
8T-0855     Pressure Gauge
4000 kPa (580 psi)     1    
Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.
Personal injury can result from hydraulic oil pressure and hot oil.Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system.Make sure all of the attachments have been lowered, oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Caterpillar Tools and Shop Products Guide" for tools and supplies suitable to collect and contain fluids on Caterpillar products.Dispose of all fluids according to local regulations and mandates.
Note: A charge relief valve is located in both the propel pumps. The charge relief valve in the axle propel pump should be the controlling relief valve (lower pressure setting). If the setting for the axle charge relief valve does not change, the drum charge relief valve may be set too low.Note: The CS-531D does not have a drum propel pump. There is only one charge relief valve in the axle propel pump.
Illustration 1 g00570874
Charge Pressure Test (1) Charge pressure test port.
Illustration 2 g00712390
(2) The charge relief valve for the axle propel pump.
Make sure that the parking brake is applied. Make sure that the propel control lever is in NEUTRAL position.
Connect a 4000 kPa (580 psi) pressure gauge to pressure test port (1) next to the propel charge filter.
Start the engine. Run the engine at high idle. Check the pressure gauge. The setting for the charge relief valve should be 2900 140 kPa (420 20 psi).
Illustration 3 g00478414
Charge Relief Valve (3) Shim.
The charge relief valve must be adjusted if the pressure setting is incorrect. In order to adjust the charge pressure, stop the engine and remove the charge relief valve from the drum propel pump.
If the charge pressure is too low, add shims (3) to the charge relief valve. If the charge pressure is too high, remove shims (3) from the charge relief valve. Note: When the shims are added to the charge relief valve, a 1 mm (0.04 inch) shim is the equivalent of raising the charge