SEAT AS 4752868 - Caterpillar

To prevent possible personal injury, be sure all cushion hitch components are completely lowered, the pressure in the hydraulic system is released, and the engine has been shut off for a minimum of five minutes to be sure the accumulator oil pressure is zero. The accumulator is filled with dry nitrogen. Do not loosen or remove the valve from the cap on top of the accumulator. A bleed screw at the bottom of the accumulator can be used to release any pressure that remains in the system.
Sudden movement of the machine or the release of oil under pressure can cause personal injury. At operating temperature, the hydraulic oil is hot and under pressure. Hot oil can cause burns. To prevent possible personal injury, release the pressure in all of the implement circuits before any hydraulic lines or components are disconnected or removed.
1. Release the pressure in the hydraulic system as follows:a. Move the machine to a smooth horizontal location. Move away from working machines and personnel.b. Permit only one operator on the machine. Keep all other personnel either away from the machine or in view of the operator.c. Move the switch for the CUSHION-HITCH to the "LOCKDOWN" position. Be sure the rear bracket assembly of the hitch is down against (resting on) the front hitch assembly.d. Activate the parking and secondary brakes. Lower the bowl to the ground. Lower the apron. Stop the engine.e. Move all scraper control levers to all positions to release the pressure in the hydraulic system.f. Carefully loosen the fill cap on the hydraulic oil tank to release the pressure in the tank.g. Be sure all hydraulic pressure is released before any fittings, hoses or components are loosened, tightened, removed or adjusted. Wait at least five minutes after the machine is turned off. 2. Disconnect five hose assemblies (1) and one tube assembly (3) from the