WHEEL GP-FDR& -K 0R2316 - Caterpillar

Problem Checklist
Hydraulic System Problems
"The temperature of the hydraulic oil is too high."
"Unusual noises from the hydraulic pump, rough movements in the cylinder rods, and the hydraulic oil contains air bubbles."
"A pause occurs in the increase to full pressure in the circuits."
"The implement hydraulic oil gets into the power train oil system."
"One or more of the control levers moves when another control lever is operated."Problems with the Bulldozer and with the Ripper
"Implement cycle times are too slow."
"There is too much cylinder drift in one of the implements."
"Implement cycle times are too fast."
"An excessive pause occurs at the ground line when the blade is lowered."Probable Causes for Hydraulic System Problems
The temperature of the hydraulic oil is too high.
The setting for the main relief valve is too low or the pump cutoff pressure is set too high. Refer to Testing and Adjusting, "Main Relief Valve - Test". Refer to Testing and Adjusting, "Pump Control Valve - Test".
An oil passage has a restriction.
The oil level is too low.
The setting for the margin spool in the pressure and flow compensator valve is too high. Refer to Testing and Adjusting, "Pump Control Valve - Test".
The charging valve is stuck in a shut position.
A control stem is out of the position.Unusual noises from the hydraulic pump, rough movements in the cylinder rods, and the hydraulic oil contains air bubbles.
Oil aeration occurs because of a loose connection or because of a restriction in the oil lines on the inlet side of the pump.
The oil level is too low.
The cylinders and lines are not fully purged of air.
The hydraulic tank has porous welds or broken baffles.A pause occurs in the increase to full pressure in the circuits.
The hydraulic circuit for the signal oil contains air.
The setting for the margin spool in the pressure and flow compensator valve is too low. Refer to Testing and Adjusting, "Pump Control Valve - Adjust".
There is a restriction in the orifice in the flow control valve.The implement hydraulic oil gets into the power train oil system.
The pump seal leak into the flywheel housing is excessive.One or more of the controls moves when another control is operated.
The plug is missing in the end of a control valve spool.
The drain holes in the end cover of the valve stack are misaligned. The drain holes do not intersect.Probable Causes for Problems with the Bulldozer and with the Ripper
Implement cycle times are too slow.
A control valve spool is out of the position.
The setting for the margin spool in the pressure and flow compensator valve is too low. Refer to Testing and Adjusting, "Pump Control Valve - Adjust".
The circuit for signal oil has internal leakage or internal blockage. Check the following causes for leakage or for blockage.
The shuttle valve is stuck or the seals of the shuttle valve are failing.
The seals of the flow control valve (tilt) are failing.
The plug in the end of a control valve spool for an implement control valve is leaking.There is too much cylinder drift in one of the implements.
The valve spool