SEAL 7X2634 - Caterpillar

Lift Circuit
Problem 1
The bucket rises slowly.Probable Causes
Main relief valve
Head end lift relief valve
Seals on lift cylinder piston
Seals on lift cylinder piston
Main hydraulic pump
Pressure reducing valve
Leakage in pump suction line
Lift pilot valve and tilt pilot valve
Low charge pressureProblem 2
There is excessive bucket drift in the lower direction (Lift Circuit).Probable Causes
Seals on lift cylinder piston
Lift control valve
Unseated shuttle valve
Head end lift relief valve
Lift pilot valveProblem 3
When the lift control lever is in the HOLD position, the hydraulic system cannot maintain the pressure that is needed in order to keep the front of the machine elevated.Probable Causes
Seals on lift cylinder piston
Rod end lift makeup valve
Lift pilot valveProblem 4
When the engine is at LOW IDLE, there is bucket drift in the lower direction as the lift control lever is slowly moved from the HOLD position to the RAISE position.Probable Cause
Load check valveTilt Circuit
Problem 1
There is bucket drift in the dump direction (Tilt Circuit).Probable Causes
Seals on tilt cylinder piston
Tilt control valve
Head end tilt relief valve
Tilt pilot valveProblem 2
There is bucket drift in the tilt back direction (Tilt Circuit).Probable Causes
Rod end tilt makeup valve
Rod end tilt relief valve
Tilt pilot valve
Seals on tilt cylinder pistonProblem 3
When the engine is at LOW IDLE, there is bucket drift in the dump direction as the tilt control lever is slowly moved from the HOLD position to the TILT BACK position.Probable Cause
Load check valveAttachment Circuit
Problem 1
The ripper does not stay up, or the multipurpose bucket does not stay open.Probable Causes
Relief valve for implement cylinder on rod end
Pilot valve for implement
Seals on piston of implement cylinder
Implement control valveProblem 2
The ripper does not stay down or the multipurpose bucket does not stay closed.Probable Causes
Relief valve for implement cylinder on head end
Pilot valve for implement
Seals on piston of implement cylinder
Implement control valve