JLG 1100S Service Manual - Manual (Page 121)

SECTION 3 - CHASSIS & TURNTABLE
3121256 – JLG Lift – 3-79
3. Refer to the Torque Sequence diagram as shown in
Figure 3-52., Swing Bearing Torque Sequence.
Spray a light coat of Safety Solvent 13 on the new
bearing bolts. Then apply a light coating of Loctite
#271 to the new bearing bolts, and install the bolts
and washers through the frame and outer race of the
bearing. Tighten the bolts to an initial torque of 190
Ft. lbs. (260 Nm) w/Loctite.
4. Remove the lifting equipment from the bearing.
5. Using suitable lifting equipment, carefully position
the turntable assembly above the machine frame.
6. Carefully lower the turntable onto the swing bearing,
ensuring that the scribed line of the inner race of the
bearing aligns with scribed line on the turntable. If a
new swing bearing is used, ensure that the filler plug
fitting is at 90 degrees from the fore and aft center
line of the turntable.
7. Spray a light coat of Safety Solvent 13 on the new
bearing bolts. Then apply a light coating of Loctite
#271 to the new bearing bolts, and install the bolts
and washers through the turntable and inner race of
the bearing.
8. Following the Torque Sequence diagram shown in
Figure 3-52., Swing Bearing Torque Sequence,
tighten the bolts to a torque of 190 ft. lbs. (260 Nm)
w/Loctite.
9. Connect the hydraulic lines to the rotary coupling as
tagged prior to removal.
10. Install the rotary coupling retaining yoke brackets,
apply a light coating of Loctite #242 to the attaching
bolts and secure the yoke to the turntable with the
mounting hardware.
11. Connect the hydraulic line disconnected during
removal back to port #4 on the back of the main
hydraulic valve.
12. Remove the lifting equipment.
13. At ground control station, use boom lift control to
lower boom to stowed position.
14. Using all applicable safety precautions, activate the
hydraulic system and check the swing system for
proper and safe operation.
Swing Bearing Torque Values
1. Outer Race - 190 ft. lbs. (260 Nm) w/Loctite.
2. Inner Race - 190 ft. lbs. (260 Nm) w/Loctite.
3. See Swing Bearing Torquing Sequence.
CHECK THE INNER AND OUTER SWING BEARING BOLTS FOR
MISSING OR LOOSENESS AFTER FIRST 50 HOURS OF OPERA-
TION, AND EVERY 600 HOURS THEREAFTER.