3.15 Swing Bearing; Turntable Bearing Mounting Bolt Condition Check - JLG T500J Service And Maintenance Manual

SECTION 3 - CHASSIS & TURNTABLE

3.15 SWING BEARING

Turntable Bearing Mounting Bolt Condition Check

NOTE: This check is designed to replace the existing bearing bolt
torque checks on JLG Lifts in service. This check must be
performed after the first 50 hours of machine operation
and every 600 hours of machine operation thereafter. If
during this check any bolts are found to be missing or
loose, replace missing or loose bolts with new bolts and
torque to the value specified in the torque chart, after lubri-
cating the bolt threads with loctite #271. After replacing
and retorquing bolt or bolts recheck all existing bolts for
looseness.
1. Check the frame to bearing attach bolts as follows:
a. Fully elevate the main boom.
b. Do a visual inspection of the bolts to see if any bolts
are missing.
c. Place a wrench on each one of the bolts and torque
to a 100 ft-lb (135.5 Nm), this should not break the
Loctite but ensure the bolts are not loose or broken.
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2. Check the turntable to bearing Attach bolts as follows:
a. Elevate the fully retracted main boom to full eleva-
tion.
b. Try to insert the 0.0015" (0.038 mm) feeler gauge
between the bolt head and hardened washer at the
unloaded side of the turntable bearing.
Figure 3-26. Swing Bolt Feeler Gauge Check
c. Lower the boom to horizontal and fully extend the
boom.
d. Try and insert the 0.0015" (0.038 mm) feeler gauge
between the bolt head and hardened washer at the
unloaded side of the turntable bearing.
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