Swing Bearing Torque Values; Swing Drive Checks - JLG T500J Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE
12. 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.
13. Spray a light coat of Safety Solvent 13 on the new bear-
ing bolts. Then apply a light coating of JLG Threadlocker
0100019 to the new bearing bolts, and install the bolts
and washers through the turntable and inner race of the
bearing.
14. Following the Torque Sequence diagram shown in Fig-
ure 3-29., Swing Bearing Torque Sequence, tighten the
bolts to a torque of 118 ft.lbs. (160 Nm) w/Loctite.
15. Remove the lifting equipment.
16. Connect the hydraulic lines to the fittings on the turnta-
ble as tagged prior to removal.
17. Install the boom assembly. Refer to Section 4.3, Boom
and Cylinder Assembly.
18. 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 - 118 ft.lbs. (160 Nm)
2. Inner Race - 118 ft.lbs. (160 Nm)
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.
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3-62

Swing Drive Checks

There are three visual checks that can be used to determine if
the swing drive is worn. Gently rock the boom back and forth
and look for the following:
1. Movement of the turntable gear (this indicates the
motor is spinning due to a worn out motor or air in the
lines)
2. Rotation of the Screw Shaft
3. Screw shaft moving in and out of the end plate
1
2
3
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