JLG 600SC_660SJC Service Manual - Manual (Page 165)

SECTION 6 - UNDERCARRIAGE
3120898 – JLG Lift – 6-61
Disassembly
Start by removing the swivel joint. Refer to Disassembly
and Assembly, "Swivel - Remove" in this manual.
NOTE: Care must be taken to ensure that fluids are con-
tained during performance of inspection, mainte-
nance, testing, adjusting and repair of the machine.
Be prepared to collect the fluid with suitable contain-
ers before opening any compartment or disassem-
bling any component containing fluids.
Dispose of all fluids according to local regulations
and mandates.
1. Make sure that the outside of the swivel joint is thor-
oughly clean prior to disassembly.
2. Remove four bolts (1) and remove cover (2) from
outside housing (8). Remove O-ring seal (4) from
outside housing (8).
3. Remove two bolts (5), the washers and retainer (7)
from rotor (9). Remove outside housing (8) from the
rotor (9).
4. Turn the outside housing upside-down and remove
O-ring seal (6) and seals (3) from the outside hous-
ing.
Assembly
1. Make sure that all of the parts of the swivel joint are
thoroughly clean and free of dirt and debris.
2. Check the condition of seals (3) and 0-ring seals (6).
if the seals or 0-ring seals are worn or damaged, use
new parts for replacement.
3. Install seals (3) and 0-ring seals (6) in outside hous-
ing (8). Apply Molybdenum Grease on seals (3) and
0-ring seals (6).
4. Install outside housing (8) over rotor (9). Install
retainer (7), two bolts (5) and the washers that hold
the retainer.
5. Check the condition of 0-ring seal (4). if the 0-ring
seal is worn or damaged, use new parts for replace-
ment.
6. Apply Molybdenum Grease on 0-ring seal (4). Install
the 0-ring seal in the outside housing.
7. Install cover (2) and four bolts (1) that hold the cover.
8. 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 to check for leaks.
9. Install the swivel joint. Refer to Disassembly and
Assembly, "Swivel - Install" in this manual.
Installation
1. Make sure that the threaded holes in the undercar-
riage frame for mounting the swivel joint are clean
and free of dirt and debris.
2. Apply Liquid Gasket to the surface of the undercar-
riage frame for the mounting of the swivel joint.
3. Fasten a suitable lifting device to the swivel joint.
The weight of the swivel joint is 65 lb (29 kg). Place
the swivel joint in swivel joint’s original position in the
undercarriage frame. Make sure that the identifica-
tion mark on the bottom face of the swivel joint is
toward the front of the machine.
4. Put Thread Lock Compound on the threads of four
bolts (5). install the washers and four bolts (5) in the
bottom of the swivel joint.
NOTE: Care must be taken to ensure that fluids are con-
tained during performance of inspection, mainte-
nance, testing, adjusting and repair of the product.
Be prepared to collect the fluid with suitable contain-
ers before opening any compartment or disassem-
bling any component containing fluids.
Dispose of all fluids according to local regulations
and mandates.