Usage:
Fluid Spillage Containment
Care must be taken to ensure that the fluids are contained during performance of the inspection, the maintenance, the testing, the adjusting and the repair of the machine. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to the "Tools And Shop Products Guide, NENG2500" the tools and the supplies suitable to collect and contain any of the fluids in Caterpillar machines. Dispose of the fluids according to local regulations and mandates.
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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 hydraulic system before any of the hydraulic lines or any the components are disconnected or removed. |
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1. Release the pressure in all of the implement hydraulic circuits (the boom, the stick and the bucket) before any of the hydraulic lines or any of the components are disconnected or removed, as follows:
a. Fully retract the stick cylinder rod.
b. Adjust the position of the bucket so that 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 place key in the "ON" position. Put the hydraulic activation control lever in the "UNLOCK" position.
e. Move the control levers for the boom, the stick and the swing to all full stroke positions. This will release any pressure that might be present in the pilot system.
f. Return the key to "OFF" position.
g. Slowly loosen the fill plug on the hydraulic tank and release the pressure.
h. Tighten the fill plug on the hydraulic tank. Tighten the fill plug to a torque of 68 ± 7 N*m (50 ± 5 lb ft).
i. The pressure in the hydraulic system has been released and the hydraulic lines and the components can be removed.
2. Clean the outside of the swivel joint and the area around the swivel joint prior to the removal.
3. Oil will drain from all hose assemblies that are connected to the swivel joint. Place drain pans under the machine in the area of the swivel joint. Disconnect hose assembly (1) from the top of the swivel joint.
4. Put identification marks on the five remaining hose assemblies (2) and (3) as to their location on the swivel joint. Disconnect four hose assemblies (2) from the swivel joint. Put plugs in the ends of the hose assemblies to keep dirt and debris out of the hydraulic system.
5. Remove hose (3) from the base of the swivel joint.
6. Remove the two bolts and the washers that hold setting plate (4) in position. Remove setting plate (4).
6. Remove eight bolts (5).
7. Remove the cover bolts from the swivel joint. Fasten Tooling (A) to the swivel joint using the cover bolts. Fasten a hoist to Tooling (A).
View From Under Machine
8. Put identification marks on hose assemblies (5) and (8) and tube assemblies (6) as to their location on the bottom of the swivel joint. Disconnect the hose assemblies and the tube assemblies from the bottom of the swivel joint. Put plugs in the hose assemblies and the tube assemblies to keep dirt and debris out of the hydraulic system.
9. Cover the ports in the bottom of the swivel joint with tape to keep dirt and debris out of the unit.
10. Remove six bolts (7).
11. Remove the swivel joint from the machine. The weight of the swivel joint is 43 kg (95 lb).
NOTE: The following steps are for the installation of the swivel joint.
12. Make sure the threaded holes in the undercarriage frame assembly for mounting the swivel joint are clean and free of dirt and debris.
13. Apply 1U-8846 Gasket Maker to the surface of the undercarriage frame assembly on which the swivel joint is installed.
14. Fasten Tooling (A) and a hoist to the swivel joint, and put it in its original position in the undercarriage frame assembly. Be sure the identification mark on the bottom face of the swivel joint is facing toward the front of the machine.
15. Apply 9S-3263 Thread Lock on the threads of six bolts (7). Install six bolts (7) in the bottom of the swivel joint.
16. Remove the tape from over the ports in the bottom of the swivel joint. Check the condition of the O-ring seals in the ends of hose assemblies (5) and (8) and tube assemblies (6). If the O-ring seals are worn or damaged, use new parts for replacement. Connect the hose assemblies and the tube assemblies in their original location on the bottom of the swivel joint. Tighten hose assembly (8) to a torque of 30 ± 4 N*m (22 ± 3 lb ft).
17. Remove the hoist and Tooling (A) from the top of the swivel joint.
18. Install setting plate (3). Install the two bolts and the washers that hold setting plate (2) in position. Reinstall eight bolts (4).
19. Check the condition of the O-ring seals in the ends of the six hose assemblies that are connected to the top of the swivel joint. If the O-ring seals are worn or damaged, use new parts for replacement. Connect the six hose assemblies in their original location on the swivel joint. Tighten the four large hose assemblies that are connected to the sides of the swivel joint to a torque of 190± 20 N*m (140 ± 15 lb ft).
NOTE: Refer to the topic "Lubricant Viscosities and Refill Capacities" in the "Operation & Maintenance Manual" for the proper filling procedure and the proper levels for the hydraulic system.
20. Fill the hydraulic oil tank with oil to the correct level.
21. Start the machine, and check for leaks.
Disassemble & Assemble Swivel Joint
Start By:
a. remove swivel joint
1. Thoroughly clean the outside of the swivel joint prior to disassembly.
2. Remove four bolts (1) and cover (2) from outside housing (8). Remove O-ring seal (4) from the outside housing.
3. Remove two bolts (5) and the washers and retainer (7) from rotor (9). Remove outside housing (8) from rotor (9).
4. Turn the outside housing over, and remove O-ring seals (6) and seals (3) from the outside housing.
NOTE: The following steps are for the assembly of the swivel joint.
5. Make sure all parts of the swivel joint are clean and free of dirt and debris.
6. Check the condition of seals (3) and O-ring seals (6). If any of the seals or O-ring seals are worn or damaged, use new parts for replacement. Install seals (3) and O-ring seals (6) in the outside housing (8). Put clean hydraulic oil on seals (3) and O-ring seals (6).
7. Install outside housing (8) over rotor (9). Install retainer (7) and two bolts (5) and the washers that hold the retainer.
8. Check the condition of O-ring seal (4). If the O-ring seal is worn or damaged, use a new part for replacement. Put clean hydraulic oil on O-ring seal (4). Install the seal in the outside housing.
9. Install cover (2) and four bolts (1) that hold it.
10. Check the swivel joint for leaks. Plug the drain ports of the inside body. Apply shop air pressure in the top of the swivel joint, and check for leaks.
End By:
a. install swing joint