JLG 740AJ Service Manual - Manual (Page 95)

SECTION 3 - CHASSIS & TURNTABLE
3121160 – JLG Lift – 3-43
3.11 SWING HUB INSTALLATION
1. Ensure mounting plate and mounting location of the
base plate are clean and painted with a uniform
coating of minimum thickness. (no runs, drips, etc.)
2. Assemble mounting plate, hub, brake, and motor.
3. Torque Items #1 to 120 ft. lbs.(17kgm)(w/#242 Loc-
tite)
4. Torque Items #2 to 285 ft. lbs.(40kgm)(w/#171 Loc-
tite)
5. Position swing drive to approx. location of bearing
gear max. eccentric tooth. (high spot)
6. With bearing free to slide, shim between pinion gear
and the bearing teeth to +.008" / +.012" (+.20mm/
+.30mm)backlash.
7. Alternately torque setscrews, item #4 to 30 ft. lbs.
(42 Nm), run jam nut tight against the 1" block.
8. Torque item #3 to 165 ft. lbs.(23 kgm)(w/ hardened
washers and #271Loctite)
Figure 3-33. Swing Torque Hub Adjustment.