SECTION 3 - CHASSIS & TURNTABLE
3-10
– JLG Lift –
3121623
Bolting The Slew Drive
DO NOT USE IMPACT SCREWDRIVERS. USING AN IMPACT SCREW-
DRIVER MAY CAUSE IMPERMISSIBLE DEVIATIONS BETWEEN THE BOLT
TIGHTENING FORCES. FAILURE OF THE BOLTED UNION WITH THE
MOUNTING STRUCTURE MAY CAUSE SEVERE PERSONAL INJURY OR
MATERIAL DAMAGE.
NOTICE
MOUNT THE SLEW DRIVE IN UNSTRESSED STATE.
Strictly comply with the procedure specified below to
avoid impermissible deviations between the bolt tighten-
ing forces:
NOTICE
FIRST FASTEN THE HOUSING, THEN FASTEN THE TOOTHED BEARING
RING!
1.
Use medium strength Loctite (Loctite 243) on
screws.
2.
Pretension the bolts, with washers if required,
crosswise in 3 steps, 30%, 80%, and 100% of the
tightening torque, or the hydraulically applied
pretension force.
3.
In this process turn the unscrewed ring several
times. Repeat the procedure for the bearing ring
that has not yet been bolted.
If using a hydraulic bolt-tensioning cylinder the tension-
ing forces for the bolt pretension should not exceed 90%
of yield strength.
Figure 3-23. Tighten crosswise
1)
F
M
for hydraulic bolt-tensioning cylinder pretension to
85% of yield strength.
1)
F
M
for hydraulic bolt-tensioning cylinder pretension to
85% of yield strength.
Table 3-3.
MOUNTING BOLT
DIMENSIONS
MOUNTING PRETENSION FORCE
F
M
1)
STRENGTH CLASS 10.9 in
kN
lbs
M24
282
63396
M27
367
82505
M30
448
100714
M33
554
124544
M36
653
146800
M42
896
201429
M45
1043
234476
M48
1177
264600
M52
1405
315857
M56
1622
364640
M60
1887
424215
M64
2138
480642
M68
2441
548759
Table 3-4.
MOUNTING BOLT
DIMENSIONS
MOUNTING PRETENSION FORCE
F
M
1)
STRENGTH CLASS 10.9 in
kN
lbs
1 – 8 UNC
301
67668
1 1/8 – 7 UNC
379
85203
1 1/4 – 7 UNC
481
108133
1 3/8 – 6 UNC
573
128816
1 1/2 – 6 UNC
697
156692
1 5/8 – 6 UNC
832
187041
1 3/4 – 5 UNC
942
211770
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