JLG 600SC_660SJC Service Manual - Manual (Page 161)

SECTION 6 - UNDERCARRIAGE
3120898 – JLG Lift – 6-57
3. Make sure that the mating surfaces of the final drive
and the undercarriage frame are thoroughly clean
and free of dirt and debris.
4. Fasten Tooling (A) and a suitable lifting device to
final drive (7), as shown. Carefully position the final
drive in the undercarriage frame. The combined
weight of the final drive, travel brake valve and travel
motor is approximately 990 lb. (450 kg).
5. Apply Thread Lock Compound on the threads of 20
bolts (8). Install 20 bolts (8) that hold the final drive
to the undercarriage frame. Tighten the bolts evenly
in a cross pattern.
6. Install two plugs (9) in the forcing bolt holes in the
undercarriage frame.
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.
7. Install new O-ring seals in the ends of tube assem-
blies (3). Install new O-ring seals in the ends of the
hose assembly (4) and hose assembly (5). Install a
new O-ring seal in elbow (6).
8. Install elbow (6) in the travel motor. Tighten the
elbow to a torque of 40 ± 5 Nm (30 ± 4 ft.lb.). Make
sure that the elbow is oriented correctly.
9. Connect hose assembly (4) and hose assembly (5)
to the travel motor.
10. Connect two tube assemblies (3) to the travel brake
valve.
11. Check the oil level in the hydraulic oil tank. Fill the
hydraulic oil tank to the correct level.
12. Start the machine and check for leaks.
13. Install cover (2). Install the washers and four bolts
(1). Tighten the bolts to a torque of 95 ± 7 ft.lb. (130
± 10 Nm).
14. Connect the track assembly. Refer to Disassembly
and Assembly, "Track - Connect".
Final Drive Oil - Change
1. Position one final drive so that oil drain plug (1) is at
the bottom.
2. Remove drain plug (1) and level plug (3). Allow the
oil to drain into a suitable container.
3. Clean the plugs and inspect the O-ring seals. If wear
or damage is evident, replace the drain plug, the
level plug, and/or the O-ring seals.
4. Install drain plug (1).