PLATE PULLER 5P1666 - Caterpillar

Do not remove any valve, hydraulic fitting or valve core, nor disassemble any parts until pressure has been released. Failure to release pressure can cause personal injury or death.
The following steps are to release the pressure in the system:a. Shut off engine.b. With operator in seat and bucket on ground, engage selector valve (pilot control) and actuate an implement control lever about ten times to release pressure in hydraulic system.c. Press the relief valve button on the hydraulic tank breather to release the tank pressure.
Hydraulic oil that is under pressure and hot can cause bodily injury. Move the control levers to relieve pressure in the hydraulic system. Let the hydraulic oil become cool before any lines are disconnected in the hydraulic system.
1. Loosen screw (1) and disconnect pump underspeed solenoid valve wiring harness (3) at the electrical connection. Remove four socket head bolts (2) from pump underspeed solenoid valve (4). Remove pump underspeed solenoid valve (4) and the O-ring seals from the solenoid valve (pilot pressure). The following step is for the installation of the solenoid valve (pump underspeed). Check all components for wear or damage and replace if necessary. Apply 1U-6396 O-ring Compound to all O-ring seals prior to installation, if applicable.2. Put pump underspeed solenoid valve (4) in position to the solenoid valve (pilot pressure). Install four socket head bolts (2) to the pump underspeed solenoid valve (4). Connect pump underspeed solenoid valve wiring harness (3) at the electrical connection and tighten screw (1). Tighten four socket head bolts (2) to a torque of 2 N m (18 lb in).