Form No. 20027 • G6-42P Owner/Operator Manual
TORQUE CHART
18.0
TORQUE (lubricated)
ITEM
FREQUENCY*
THREAD SIZE
FT.-LB.
Nm
(GRADE)
MINIMUM
MAXIMUM
MINIMUM
MAXIMUM
Boom Slide Bearings (front)
5 Weeks (250 hrs)
3/8-24 (5)
32
37
43
50
5 Weeks (250 hrs)
1/2-20 (5)
76
86
103
116
Boom Slide Bearings (rear)
If front bearings have
3/8-24 (5)
32
37
43
50
worked loose
1/2-20
76
86
103
117
Boom Chain Jam Nuts
Annually (1500 hrs)
7/8-14
100
125
136
169
Cab Mounting Bolts (upper)
7/8-9
530
565
719
766
(lower)
3/4-10
340
365
461
495
Engine Assembly
Flywheel Housing Bolts
Annually (1500 hrs)
M10
38
48
52
65
Flexplate Mounting Bolts
Annually (1500 hrs)
3/8-16
40
45
54
61
Hydrostatic Trans Bolts
Annually (1500 hrs)
3/4-10 (5)
240
265
325
359
Engine Mounts
Annually (1500 hrs)
M12
66
76
89
103
M16
166
181
225
245
Front Axle Motor to Axle Bolts
Annually (1500 hrs)
M20
324
349
439
473
Rear Axle
Hub Assembly Mntg Bolts
Annually (1500 hrs)
3/4-10
270
290
366
393
Steering Cylinder Rod to
Knuckle Mntg Pin (Bottom)
6 Months (1000 hrs)
1 1/4-12
280
305
380
414
Wheel Lug Nuts
3 Months (500 hrs)
-
350
400
474
542
* Check torque at whichever interval occurs first.
The preceeding bolt torque chart covering English and
Metric fasteners are used by Gradall engineering. Gradall
ratings are for lubricated fasteners. Do not exceed the
allowable rating. An over-torqued bolt in most cases will
fail as rapidly as an under-torqued bolt.
CAUTION
!
To check GRADALL torque values, set the torque wrench at 95% of rated torque value and check fastener. If the
torque wrench releases before the fastener moves, assume fastener torque is correct. When setting GRADALL
torque values, use the values given on the following chart. Do not exceed allowances.
