SECTION 3 - CHASSIS & TURNTABLE
31215031
3-55
3.17 SWING BEARING
Turntable Bearing Mounting Bolt Condition Check
NOTE:
This check is designed to replace existing bearing bolt
torque checks on JLG Lifts in service. This check must be
performed after 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 High Strength Threadlocking Com-
pound. After replacing and retorquing bolt or bolts recheck
all existing bolts for looseness.
1.
Check frame to bearing. Attach bolts as follows:
a.
Elevate fully retracted main boom to 70 degrees (full
elevation).
b.
At the positions indicated on Figure 3-56. try and
insert the 0.0015 in. (0.0381 mm) feeler gauge
between the bolt head and hardened washer at the
arrow indicated position.
c.
Assure that the 0.0015 in. (0.0381 mm) feeler gauge
will not penetrate under the bolt head to the bolt
shank.
d.
Swing turntable 90 degrees and check some
selected bolts are at the new position.
e.
Continue rotating turntable at 90 degrees intervals
until a sampling of bolts have been checked in all
quadrants.
2.
Check the turntable to bearing. Attach bolts as follows:
a.
Elevate the fully retracted boom to 70 degrees (full
elevation).
b.
Try and insert the 0.0015" feeler gauge between
bolt head and hardened washer at position shown
in
c.
Lower the boom to horizontal and fully extend the
boom.
d.
Try and insert the 0.0015" feeler gauge between
bolt head and hardened washer at position shown
in Figure 3-56.
Figure 3-56. Swing Bearing Bolt Feeler Gauge Check
.0015" Feeler Gauge
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