JLG 460SJ ANSI Service Manual - Manual (Page 98)

SECTION 3 - CHASSIS & TURNTABLE
3-44 – JLG Lift – 3120788
6. Have an assistant check to see that right front wheel
remains locked in position off of ground.
7. Carefully activate SWING control lever and return
boom to stowed position (centered between drive
wheels). After boom reaches stowed position, acti-
vate DRIVE and lockout cylinders should release
and allow wheel to rest on ground.
8. Place the 6 in. (15.2 cm) high block with ascension
ramp in front of right front wheel.
9. Place DRIVE control lever to FORWARD and care-
fully drive machine up ascension ramp until right
front wheel is on top of block.
10. Carefully activate SWING control lever and position
boom over left side of machine.
11. With boom over left side of machine, place DRIVE
control lever to REVERSE and drive machine off of
block and ramp.
12. Have an assistant check to see that right front wheel
remains locked in position off of ground.
13. Carefully activate SWING control lever and return
boom to stowed position (centered between drive
wheels). After boom reaches stowed position, acti-
vate DRIVE and lockout cylinders should release
and allow wheel to rest on ground.
If lockout cylinders do not function properly, have qualified
personnel correct the malfunction prior to any further
operation.
3.13 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.
Check the frame to bearing. Attach bolts as follows:
1. Elevate the fully retracted boom to full elevation and
rotate platform 90 o .
2. Swing turntable over the side.
3. On the frame, at the rear of the turntable, try to insert
the 0.0015" feeler gauge between the bolt head and
hardened washer at the indicated position. (Table 3-
31., Swing Bearing Feeler Gauge Check)
4. Assure that the 0.0015" feeler gauge will not pene-
trate under the bolt head to the bolt shank.
5. Swing the turntable 90 degrees, and check some
selected bolts at the new position.
6. Continue rotating the turntable at 90 degrees inter-
vals until a sampling of bolts have been checked in
all quadrants.
7. Lower the boom to horizontal and fully extend the
boom.
8. Swing the turntable over the side.
9. On the frame, at the front of the turntable, try to
insert the 0.0015" feeler gauge between the bolt
head and hardened washer at the indicated posi-
tion. (Figure 3-31.)
10. Assure that the 0.0015" feeler gauge will not pene-
trate under the bolt head to the bolt shank.
11. Swing the turntable 90 degrees, and check some
selected bolts at the new position.
12. Continue rotating the turntable at 90 degrees inter-
vals until a sampling of bolts have been checked in
all quadrants.