CABLE 5415791 - Caterpillar

At operating temperature, the hydraulic oil tank is hot and under pressure. Hot oil can cause burns. To prevent possible personal injury, release the pressure in the implement hydraulic circuits (boom, stick and bucket) before any hydraulic lines or components are disconnected or removed.
1. Release the pressure in the hydraulic system as follows: a. Fully retract the rod in the stick cylinder.b. Adjust the position of the bucket so it will be flat on the ground when the boom is lowered.c. Lower the boom until the bucket is flat on the ground.d. Shut off the engine, and put the hydraulic activation control lever in the "Lock" position.e. Move the control levers for the boom, bucket, stick and swing through their full travel strokes. This will relieve any pressure that may be present in the pilot system.f. Slowly loosen the air breather cap on the hydraulic oil tank to release the pressure.g. Tighten the air breather cap on the hydraulic oil tank.h. The pressure in the hydraulic system has now been released. Lines and components can now be removed.2. Drain the oil from the hydraulic oil tank into a suitable container. The capacity of the hydraulic oil tank is 136 liters (36 U.S. gal). 3. Open the right rear access door. Put identification marks on two wires (1) for installation purposes. Disconnect two wires (1) from the sending unit on the side of the hydraulic oil tank. 4. Remove four bolts (2) to disconnect tube assembly (4) from the side of the hydraulic oil tank. Remove four socket head bolts (5) to remove block (3) from the side of the hydraulic oil tank.
View From Under Hydraulic Oil Tank5. Disconnect tube assembly (6) from the bottom of the hydraulic oil tank.6. Remove the four bolts and washers that hold the hydraulic oil tank to the frame of the machine. 7. Remove four bolts (7) and the washers that hold cover (8) in position. Remove the cover. 8. Fasten tool (A) and a hoist to the top of the hydraulic oil tank as shown. Remove hydraulic oil tank (9) from the machine. The weight of the hydraulic oil tank is 163 kg (360 lb).9. Put identification marks on the shims used between the frame of the machine and the hydraulic oil tank for installation purposes. Remove the shims from the frame of the machine. The following steps are for the installation of the hydraulic oil tank.10. Check the condition of the O-ring seal used in the tube assembly that is connected to the bottom of the hydraulic oil tank. If the seal is worn or damaged, use a new part for replacement.11. Put the shims for the hydraulic oil tank in their original position on the frame of the machine.12. Fasten tool (A) and a hoist to hydraulic oil tank (9). Put the hydraulic oil tank in position on the frame of the machine. Install the four bolts and washers that hold it in place. Tighten the four bolts to a