JLG 680S, Руководство по обслуживанию и ремонту

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SECTION 3 - CHASSIS & TURNTABLE
3121234 3-135
3.20 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 JLG Threadlocker P/N
0100019. After replacing and retorquing bolt or bolts
recheck all existing bolts for looseness.
1. Check the frame to bearing attach bolts as follows:
a. Elevate the fully extended main boom to horizontal.
(See Figure 3-76.)
b. At the positions indicated on Figure 3-78., try to
insert a 0.0015 in. feeler gauge between the bolt
and hardened washer at the arrow indicated posi-
tion.
c. Ensure that the 0.0015 in. feeler gauge will not pen-
etrate 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 inter-
vals 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 main boom to full eleva-
tion. (See Figure 3-75.)
b. At the position indicated on Figure 3-78., try to
insert the 0.0015 in. feeler gauge between the bolt
head and hardened washer at the arrow indicated
position.
c. Lower the boom to horizontal and fully extend the
boom.
d. At the position indicated on Figure 3-78., try and
insert the 0.0015 in. feeler gauge between the bolt
head and hardened washer at the arrow indicated
position.
18
24
16
8
4
12
20
21
13
5
1
9
23
7
3
11
19
22
14
6
2
10
15
17
Figure 3-74. Swing Bearing Torque Sequence
NOTE: Swing Bearing Torque Sequence is typical for both inner and outer races.