ENGINE AR 1056573 - Caterpillar

4The pump standby pressure is too low.Possible Causes
The pressure compensator is set too low.
The spring for the pressure compensator in the pump is broken.
The pump is not upstroking. The swashplate is blocked or the actuator spring is broken.
Because the setting for the torque limiter is wrong, the torque limiter opens and the torque limiter causes a leak in the signal network.
The signal network is blocked.Problem 5Pump standby pressure is too high.Possible Causes
The flow compensator is set too high.
The flow compensator is not moving.
The pump is not destroking. The actuator piston is stuck or the swashplate is blocked.Problem 6There is a pause before the pressure is reached in all circuits.Possible Causes
The margin pressure is low.
There is air in the signal network.
There is leakage in the signal network.
An orifice is slightly plugged in the signal network.
There is an incorrect orifice in the signal network.Problem 7Any of the implements move, when the control lever is in the HOLD position. Possible Causes
The pilot control valve (if equipped) is stuck open.
The control valve spool or the bore for the valve spool may be worn excessively. This may cause leaks.
There is leakage in the seals and around the seals of the piston in the cylinders that are affected.
There is a leak in the lines between the control valve and the cylinders.
The solenoid for the multipurpose bucket has current and the solenoid has contamination.
The makeup valves are open.
The swing check valves are open.Problem 8The line relief valves are too noisy.Possible Causes
The line relief valves that are affected are set too low.
The springs in the line relief valves that are affected are broken or fatigued.
The pressure compensator valve is set too high.Problem 9There is too much implement drift.Possible Causes
There is leakage in the seals and around the seals of the piston in the cylinder that are affected.
The line relief valve is set too low.
There is leakage past a line relief/makeup valve in the circuit that is affected.
The spool in the main control valve is not correctly centered. This problem can be caused by a broken spring, a sticky valve spool or a control linkage that is not adjusted properly.
If the drift problem is in the stabilizer cylinders, the cause can be any of the possible causes. In addition, the lock valve in the stabilizer that is affected may not be seated properly. The problem can be from pilot pressure that is trapped.
The control valve spool or the bore for the valve spool may be worn excessively. This may cause leaks.
The lock check valves are open.Problem 10The implement droops, when the implement is moved from a partially raised position to a raised position.Possible Causes
The signal passages in the main spool of the control valve that is affected is blocked. The signal passages may leak into the signal network.
The flow control spool is not operating properly.
The load check valve may be stuck in the boom circuit, the bucket circuit or the stick circuit.
The margin pressure is set too low.
There is air in the signal network.Problem 11All implement cycle