PLATE STEP 5P7377 - Caterpillar

At operating temperature, the hydraulic oil is hot and under pressure. Hot oil can cause burns. Sudden movement of the machine or release of oil pressure can cause injury to persons on or near the machine. To prevent possible injury, perform the following procedure before working on the hydraulic and steering systems.
a. Move the machine to a smooth horizontal location. Move away from working machines and personnel. Lower all implements to the ground. Install the wheel lean pin in front axle.b. Permit only one operator on the machine. Keep all other personnel either away from the machine or in view of the operator.c. Activate the parking brake. Place all implements on the ground and put the blade in the "FLOAT" position.d. Stop the engine.e. Turn the steering wheel back and forth several times to relieve pressure in the steering accumulator.f. Carefully loosen the filler cap on the hydraulic tank to release pressure in the tank.g. Be sure all hydraulic pressure is released before any fitting, hose, or component is loosened, tightened, removed or adjusted.h. Tighten the cap on the hydraulic tank.i. The pressure in the hydraulic system must be released before lines or components can be removed.
Hydraulic pressure can exist in the hydraulic lines between the control valves and the cylinders with the engine stopped. Manually relieve pressure before working on any hydraulic circuit.
2. Attach a lifting sling and a hoist to cylinder (5) in order to prevent it from falling during removal.3. Disconnect the fittings on hose assemblies (3) and (6). Plug the fittings in order to prevent the loss of oil, and in order to keep dirt out of the hydraulic system.4. Remove two bolts (2) and the washers from pin lock (1). Remove pin lock (1) from the mounting bracket.5. Remove pin (4) that holds scarifier lift cylinder (5) to the mounting bracket. 6. Place a wood block on the circle draw bar. Lower scarifier lift cylinder (5) to the block.7. Remove two bolts (7) and the washers from pin lock (8). Remove pin lock (8) from the mounting. Remove pin (9) that holds the rod end of scarifier lift cylinder (5) to the mounting bracket. Remove scarifier lift cylinder (5) from the machine. The weight of scarifier lift cylinder (5) is 32 Kg (71 lb).Install Scarifier Lift Cylinder
1. During the installation of scarifier lift cylinder (5), check the condition of all O-ring seals used in the ends of hose assemblies that were disconnected. If any of these seals are damaged, use new parts for replacement. 2. Attach a lifting sling and a hoist to scarifier lift cylinder (5). Position scarifier lift cylinder (5) to the machine. Place a wood block on the circle draw bar. Lower scarifier lift cylinder (5) to the block.3. Position the rod end of scarifier lift cylinder (5) in the mounting bracket. Align the pin retention holes in the bracket and the cylinder rod. Install pin (9) that holds the rod end of scarifier lift cylinder (5) to the mounting