HOUSING-GOV 1502506 - Caterpillar

Illustration 1 g00434558
Pilot Manifold (1) Low pilot pressure tapConnect a 5515 kPa (800 psi) pressure gauge to low pilot pressure tap (1) on the pilot manifold.
Connect the 6V-4143 Coupler Assemblies to the 6V-3079 Pressure Hose Assemblies .
Connect a hose assembly to pressure tap (1) and a 8T-0856 Pressure Gauge .
Start the engine.
Warm the oil to a minimum temperature of 50 °C (122 °F). Refer to the Testing and Adjusting, "General Information" for the proper procedure for warming the hydraulic oil.
Set the throttle switch to position 3.
Read the pressure gauge that is connected to pressure tap (1). The pressure should be 4000 200 kPa (580 29 psi).
Illustration 2 g00434666
Pilot Manifold (2) Low pressure pilot relief valve
Illustration 3 g00434667
Pilot Relief Valve (3) Locknut (4) Adjustment screw
To adjust the pilot pressure for the low pressure pilot circuit, loosen the locknut (3) on the relief valve (2). Turn the adjustment screw (4) until the pressure gauge indicates 4000 200 kPa (580 29 psi). Tighten locknut (3) .Note: Always make pressure adjustments on the pressure rise.
With the engine at throttle position 1, verify that the low idle setting is at 725 20 rpm. The low pilot system pressure should be no less than 3100 kPa (450 psi). If the low pilot system pressure is less than 3100 kPa (450 psi), refer to Testing and Adjusting, "Hydraulic System Troubleshooting".