CLAMP 1006975 - Caterpillar

Note: Pressure values in Table 6 are approximate values. Monitor the machine pump pressure sensors for adjustment.Bucket Cylinder Head End and Rod End, Boom Cylinder Rod End and Head End, and Stick Cylinder Head End and Rod End
Note: A continuous relief of the valve for more than 10 seconds is not allowed.
Illustration 4 g03471096
Main control valve
(3) Main relief valve (front pump)
(4) Main relief valve (rear pump)
(5) Line relief valve for the stick cylinder rod end
(6) Line relief valve for the stick cylinder head end
(7) Line relief valve for the bucket cylinder rod end
(8) Line relief valve for the bucket cylinder head end
(9) Line relief valve for the boom cylinder rod end
(10) Line relief valve for the boom cylinder head end
Start the engine.
Place the hydraulic activation control lever in the UNLOCKED position.
Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Use the monitor to enter the next steps.
Move the joystick for the stick until the stick is at the full STICK IN position (full extension of the stick cylinder).
Table 7
Initial Main Relief Setting
Pump #1 Outlet Pressure
Pump #2 Outlet Pressure
Measure and record the high main relief valve setting. Use "Pump #1 Outlet Pressure" and "Pump #2 Outlet Pressure". The high main relief valve pressure setting should be 37000 kPa (5366 psi).
Make the temporary main relief setting.
Illustration 5 g03629779
Main relief valve
(A) Locknut for high main relief setting
(B) Adjustment screw for high main relief setting
(C) Locknut for low main relief setting
(D) Adjustment screw for low main relief setting
Loosen the locknut. Set the main relief pressure to