TUBE-EXHAUST 3824307 - Caterpillar

Implement System Problems
Any implement moves with the control lever in HOLD position.Probable cause
The control valve and the valve spool have a large amount of wear.
A piston seal in a cylinder is damaged or the seal has a large amount of wear.
A leak in the connection between the control valve and the cylindersThe control stem on the valve does not shift into the valve body.Probable cause
Dirt or water in the end housingToo much implement driftProbable cause
There is leakage in the cylinder seals or around the cylinder seals of the affected cylinder.
There is a leakage past a makeup valve for the affected circuit. This relates only to the bulldozer lift.
The spool in the main control valve is not correctly centered. This problem can be caused by a broken spring or a sticky valve spool.
The control valve or the spool has a large amount of wear.The implement droops when you go from a partially raised position to a raised position.Probable cause
Air in the signal network
The resolver is not closing because of dirt or debris between the ball and the seat. See the Testing and Adjusting, "Resolver Network Check".
Springs in the flow compensator valve may be broken or fatigued.
The flow compensator valve is incorrectly set. The margin pressure is too low.All implement cycle times are too slow.Probable cause
Blockage or leakage in the signal network
Margin pressure setting is incorrect.
The pump is not at full stroke. This can be caused by one of the following problems.
The actuator piston is stuck.All implement cycle times are too fast.Probable cause
Margin pressure is too high.The bulldozer blade moves upward when you are dozing with the control lever in HOLD position (float).Probable cause
The makeup valve is not closing.
The makeup valve is not opening when the blade is being lowered.The pause at ground level is too long before the machine starts to raise.Probable cause
The restrictor spool in the inlet manifold for the implement valve stays open. This can be caused by one of the following problems.
Broken spring for the restrictor spool
The restrictor spool is stuck.Line relief valves are too noisy.Probable cause
The affected relief valve is set too low.
Springs in the affected relief valve are broken or fatigued.
The pressure compensator valve is set too high.The decking blade or the grapple moves with the control lever in the HOLD position.Probable cause
The control valve and the valve spool have a large amount of wear.
A piston seal in a cylinder has a large amount of wear.
There is a leak in a connection between the control valve and the cylinders.
The line relief/makeup valves are open.
The spool in the main control valve is not correctly centered. This problem can be caused by a broken spring or a sticky valve spool.
If a valve spool is pilot operated, residual pilot pressure may be the cause.
If a valve spool is electrically operated, residual voltage in the wiring harness may be the cause.Too much drift in the decking blade or the grapple.Probable cause
There is leakage in the cylinder seals or around the cylinder seals of the affected cylinder or cylinders.
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