RING EXTERNAL 5P7337 - Caterpillar

1. Lower the blade to the ground and tilt it forward. Attach Tooling (A), lifting slings and a hoist to the blade. Put a slight lifting tension on the slings.2. Release the pressure in the hydraulic system as follows:
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.
3. Remove bolt (2), the washer, the nut and the clip that holds hose assembly (1) to guard assembly (3).4. Remove four bolts (5), the washers, the spacers, the nuts and two brackets (4) that hold right side guard assembly (3) to the circle assembly.5. Disconnect the fittings of hose assembly (1) from the blade side shift cylinder that is under guard assembly (3). Plug the fittings in order to prevent the loss of hydraulic oil, and in order to keep dirt out of the hydraulic system.6. Repeat Steps 3 and 4 to remove the left guard assembly from circle assembly (25). Disconnect the fittings of the hose assembly from the blade sideshift cylinder that is under the left side guard assembly. Plug the fittings in order to prevent the loss of hydraulic oil, and in order to keep dirt out of the hydraulic system. 7. Remove four bolts (6), and the washers from plate (7). Remove plate (7) and shims (8) from middle blade mounting bracket (9). 8. Remove nut (10) from rod (11).9. Remove cotter pin (13) from nut (14). Remove nut (14) and the washer from rod (15).10. Move mounting bracket (12) off of rods (11) and (15). Do not remove the two shims that are located under bracket (12) and on rod (15). 11. Remove nut (16) from rod (11).12. Remove bolt (18), the washer and the nut that hold pin (19)