JLG 1250AJP Service Manual - Manual (Page 144)

SECTION 3 - 1CHASSIS & TURNTABLE
3-96 – JLG Lift – 3121171
3.18 PROCEDURE FOR SETTING GEAR
BACKLASH
1. Set backlash to 0.010 to 0.015" using the following
procedure.
2. Place shim (JLG p/n 4071041) between pinion and
bearing on the bearing high spot. The bearing high
spot should be stamped with an "X" on the surface
below the teeth and marked with yellow paint in the
tooth space.
3. Torque the shoulder screw (shown below) to 660
foot-pounds (896 Nm) with Loctite #271.
4. Remove the turntable lock pin.
5. Pre-torque the capscrews (shown below) to 90 foot-
pounds (122 Nm) with Loctite #271.
6. Tighten the setscrew (shown below) until the pinion
is completely snug against the shim and bearing
and then back off the setscrew.
7. Torque the setscrew to 50 foot-pounds (68 Nm).