HARNESS AS 2382226 - Caterpillar

Relief Valve Test
Illustration 1 g00315269
(1) Pressure tap for the front section of the pump (2) Pressure tap for the rear section of the pump
Lower the dump body completely. Stop the engine.
Relieve any system pressure that may be present. Move the hoist control to the RAISE and LOWER positions. Then place the hoist control in the FLOAT position.
Connect two hose assemblies to two 8T-0860 Pressure Gauges. Connect the hose assemblies to both of the pressure taps on the hoist and rear brake cooling gear pump. Make sure that the hoses for the pressure gauges are long enough to be extended into the cab.
Start the engine. Operate the dump body repeatedly until the temperature of the hydraulic oil is above 38 °C (100.0 °F).
Run the engine at LOW IDLE. Move the hoist control to the RAISE position until the cylinders are fully extended. Attach the safety cable for the dump body.
Slowly accelerate the engine to the HIGH IDLE position. Hold the hoist control in the RAISE position. The pressure range is 17350 350 kPa (2515 50.0 psi). Record the highest pressure that is read on the gauge. If the pressure exceeds this range, investigate the cause of the higher pressure.
If the pressure setting is incorrect, adjust the relief valve on the hoist diverter valve. Refer to "Relief Valve Adjustment" within the original Service Module for the correct adjustment procedure.
Raise the dump body completely. Remove the safety cable for the dump body.
Run the engine at LOW IDLE. Move the dump body to the LOWER position.
Hold the hoist control in the LOWER position. Run the engine at HIGH IDLE. The pressure range is 17300 200 kPa (2510 29 psi). The high pressure gauge reading is the relief valve pressure setting.
If the pressure setting is incorrect, adjust the relief valve on the hoist diverter valve. Refer to "Relief Valve Adjustment" within the original Service Module for the correct adjustment procedure.