JLG 1230ES Service Manual - Manual (Page 54)

SECTION 4 - BASE COMPONENTS
4-18 – JLG Lift – 3121222
Main Gear Box Disassembly
Main Gear Box isassembly
1. Using a screwdriver, pry the end of the Retaining Ring (19) out of the groove in the Hub Subassembly, then grasp
the loose end of the Retaining Ring (19) with pliers and pull the rest of the way out.
2. Remove Cover (11). Thrust Washer (21) should remain in the inner counterbore of the Cover (11) when removed.
NOTE: To remove the cover the motor must be removed. Slide a rod through the motor shaft hole and gently tap with a rubber hammer to
force the cover out.
3. Remove Input Sun Gear (4).
4. Remove Input Carrier Subassembly.
5. Remove Cover (11) O-ring (20).
6. Remove Input Ring Gear (3).
NOTE: The Input Ring Gear (3) is held in with a press fit on its outside diameter. Insert jacking screws (1/4-20UNC, grade 8) with at least
1.5 inches of thread length into each of the three tapped holes to force the ring gear out. Be sure and alternate between the jacking
screws to keep the ring gear from becoming misaligned in the bore. The screws will push against the outer race of the main bearing.
This bearing will have to be replaced afterwards.
7. Using a screwdriver, remove Spiral Retaining Ring (27).
8. Pull Hub Subassembly off of the Spindle (1) Subassembly.