Gear Backlash; Swing Drive Lubrication - JLG 660SJ Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

Gear Backlash

Set backlash to .010 - .015 in (0.254 to 0.381mm).
1. Insert shim (JLG P/N 4071009) between pinion and bear-
ing 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.
Shim
Figure 3-47. Swing Drive Shim Placement
2. Apply JLG Thread locking compound P/N 0100019 to
pivot bolt. Torque pivot bolt to 205 ft-lb (280 Nm).
3. Remove turntable lock pin.
4. Apply JLG Thread locking compound P/N 0100019 to
four mounting bolts. Torque mounting bolts to 30 ft-lb
(40 Nm).
Pivot Bolt
Figure 3-48. Swing Drive Pivot and Mounting Bolts
3-36

Swing Drive Lubrication

Mounting Bolt
– JLG Lift –
5. Loosen jam nut.
6. Tighten jack bolt until pinion is snug against shim and
bearing, then loosen jack bolt.
7. Apply JLG Thread locking compound P/N 0100019 to
jack bolt threads. Torque jack bolt to 50 ft-lb (68 Nm).
8. Tighten jam nut.
9. Torque four mounting bolts to 340 ft-lb (461 Nm).
Figure 3-49. Swing Drive Jam Nut and Mounting Bolt
10. Remove and discard swing drive shim.
Fill Swing Drive Gearbox with 43 oz (1.27L) 90w80 gear oil with
EP additives. Oil should cover the ring gear. Torque pipe plug
23 - 24 ft-lb (31 - 32.5 Nm).
Figure 3-50. Swing Drive Lubrication
Jam Nut
Jack Bolt
Mounting Bolt
Fill Plug
Drain Plug
3121298