Jlg 40H Service Manual User Manual download pdf (Page 79)

SECTION 2 - PROCEDURES

3120240 – JLG Lift – 2-59

2.23 SWING BEARING.

Turntable Bearing Mounting Bolt Condition

Check.

NOTE: This check is designed to replace the existing bear-

ing 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 lubricating 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 retracted boom.

b. At the position indicated on "a" of Figure 2-32, try

to insert a.0015 feeler gauge between the bolt

and hardened washer at the arrow indicated

position.

c. Ensure that the.0015” feeler gauge will not pene-

trate under the bolt head to the bolt shank.

d. Swing the turntable 90 degrees, and check

some selected bolts at the new position.

e. Continue rotating the 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 fol-

lows:

a. Fully extend boom at horizontal.

b. At the position indicated on "b" of Figure 2-32, try

to insert the.0015” feeler gauge between the bolt

head and hardened washer at the arrow indi-

cated position.

At the position indicated on Figure 2-33, try and insert

the.0015” feeler gauge between the bolt head and hard-

ened washer at the arrow indicated position.

Figure 2-32. Swing Bearing Tolerance Boom Placement.

Figure 2-33. Swing Bolt Feeler Gauge Check.

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Jlg 40H Service Manual User Manual Page 79