HOLDER 1991148 - Caterpillar

Problem
The response of all the implements are too slow.Probable Cause
Air is in the signal system.
The check valve is leaking or the ball resolver in the signal network system is leaking.
There is contamination in any of the control valves.
Air is in the system.
The signal purge valve is stuck open.
The signal relief valve malfunctions.
The flow compensator (margin pressure) is set too low.
The implement relief valve is set too low or the implement relief valve leaks.
The steering priority valve in the combination valve has malfunctioned.Problem
Implement circuits will not operate when one cylinder is stalled.Probable Cause
The pressure compensator (pressure cutoff) is set too low or the signal relief valve is set too high. Refer to Testing and Adjusting, "Pump Control Valve (Hydraulic, Steering) - Test and Adjust".Problem
The performance of a single implement circuit is erratic.Probable Cause
The implement control valve is contaminated.
The control valve stem is incorrect for this circuit.
The flow compensator (margin pressure) is set incorrectly.Problem
The performance of all the implement circuits are erratic.Probable Cause
The hydraulic oil in the hydraulic system has not reached normal operating temperature.
The hydraulic and steering pump has failed or the pump control valve has failed.
Air is in the hydraulic system.Problem
Any implement moves with the control lever in the HOLD position.Probable Cause
The cylinder piston seals have failed or the cylinder piston seals are worn. The steering line relief valve has failed or the steering line relief valve is worn.
The lock check valve has failed or the port relief has failed.
The implement relief valve is malfunctioning.Problem
When the implement is first activated, the implement surges.Probable Cause
An incorrect control stem is installed in the implement control valve.
Air is in the circuit.
The flow compensator (margin pressure) is set too high.
The discharge pressure of the hydraulic and steering pump remains too high after the signal pressure drops.Problem
Too much effort is needed to move the control lever.Probable Cause
The lever linkage is restricted or the lever linkage has interference.
The bias spring in the implement control valve is missing or the bias spring in the implement control valve is incorrect.
The implement control valve has a sticking control stem or the implement control valve has a failed control stem.Problem
The implements do not work but the steering does work.Probable Cause
The combination valve has a failed ball resolver or the combination valve has a failed signal check valve.
The steering priority valve is stuck. This stops the oil flow to the implements.
The signal relief valve has failed in the OPEN position or the pressure setting is set incorrectly.Problem
The response of the implements is too fast.Probable Cause
An incorrect control stem is installed in the implement control valve.
The implement control valve has failed.
The flow compensator (margin pressure) is set too high.Problem
The hydraulic and steering pump does not return to the low standby pressure after the implement is used.Probable Cause
The control lever has interference. The control lever does not return to the HOLD position. The signal pressure is still sent to the pump control valve.
The signal purge valve has malfunctioned in the CLOSED position.
In a no steer condition, a steering signal that is