Usage:
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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 implement hydraulic circuits (boom, stick and bucket) before any hydraulic lines or components are disconnected or removed. |
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- 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.
- b. Adjust the position of the bucket so it will be flat on the ground when the boom is lowered.
1. Release the pressure in the hydraulic system as follows:
2. Clean the outside of the swivel joint and the area around the swivel joint prior to removal.
3. Put identification marks on six hose assemblies (1) as to their location on the swivel joint. Disconnect six hose assemblies (1) from the swivel joint. Put plugs in the ends of the hose assemblies to keep dirt and debris out of the hydraulic system.
4. Remove two bolts (2) and the washers that hold setting plate (3) in position. Remove setting plate (3).
5. Remove eight bolts (4).
6. Remove one cover bolt from the swivel joint. Fasten tool (A) to the swivel joint using the cover bolt. Fasten a hoist to tool (A).
View From Under Machine
7. Remove bolts (5) and two covers (6) from the underside of the undercarriage frame assembly.
View From Under Machine
8. Put identification marks on hose assemblies (7) and (9) as to their location on the bottom of the swivel joint. Disconnect the seven hose assemblies from the bottom of the swivel joint. Put plugs in the hose assemblies to keep dirt and debris out of the hydraulic system.
9. Cover the parts in the bottom of the swivel joint with tape to keep dirt and debris out of the unit.
10. Remove six bolts (8).
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. Be sure the threaded holes in the undercarriage frame assembly for mounting the swivel joint are clean and free of dirt and debris.
13. Apply a bead of 3S6252 RTV Silicone Adhesive/Sealant to the surface of the undercarriage frame assembly on which the swivel joint is installed.
14. Fasten tool (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. Install six bolts (8) 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 six hose assemblies (7) and one hose assembly (9). If the seals are worn or damaged, use new parts for replacement. Connect the seven hose assemblies in their original location on the bottom of the swivel joint. Tighten hose assembly (9) to a torque of 150 ± 15 N·m (110 ± 11 lb ft).
17. Remove the hoist and tool (A) from the top of the swivel joint. Reinstall the one cover bolt in the top of the swivel joint.
18. Install setting plate (3). Install two bolts (2) and the washers that hold the setting plate in place.
19. Check the condition of the O-ring seals in the ends of six hose assemblies (1). If the seals are worn or damaged, use new parts for replacement. Connect six hose assemblies (1) in their original location on the swivel joint.
20. Fill the hydraulic oil tank with oil to the correct level. See the Operation & Maintenance Manual for the correct filling procedure.
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. Be 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 the seals are worn or damaged, use new parts for replacement. Install seals (3) and O-ring seals (6) in outside housing (8). Put 5P0960 Multipurpose Grease 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 seal is worn or damaged, use a new part for replacement. Put 5P0960 Multipurpose Grease 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 swivel joint