JLG 1350SJP Service Manual - Manual (Page 151)

SECTION 3 - CHASSIS & TURNTABLE
3121142 – JLG Lift – 3-105
3. Refer to the Torque Sequence diagram as shown in Fig-
ure 3-58., 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. (258 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 fit-
ting 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 bear-
ing 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 Fig-
ure 3-58., Swing Bearing Torque Sequence, tighten the
bolts to a torque of 190 ft. lbs. (258 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. (258 Nm) w/Loctite.
2. Inner Race - 190 ft. lbs. (258 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 OPERATION, AND EVERY 600 HOURS
THEREAFTER.