KIT-GASKET 2689138 - Caterpillar

electronic control module is not calibrated.
The pressure reducing valve for pilot pressure is not functioning properly.
The main control valve is contaminated or damaged.
The load check valve is not closing because the spring is weak or broken or because there is dirt or debris in the check valve.Problem 10: There is too much lift cylinder drift.Drift is a cylinder movement with the control lever or the joystick in the HOLD position.Probable causes:
The modulation current to the solenoid is incorrect.
The ride control valve is worn or damaged.
The piston seals and/or the lift cylinders are worn.
The components of the main control valve are worn or damaged.
The load check valve is not closing because the spring is weak or broken, or because there is dirt or debris in the check valve.
The lift lever sensor