PART 8: MAINTENANCE AND SERVICE FASTENERS
(R10/06) Y53-6007 – 185 –
cle conditions, including: hard steering, axle
misalignment, spring breakage or abnormal
tire wear.
• Do not replace U–bolts and nuts with common
U–bolts or standard nuts. These parts are crit
-
ical to vehicle safety. If the wrong U–bolts or
nuts are used, the axle could loosen or sepa
-
rate from the vehicle and cause a serious
injury accident. Use only U–bolts and nuts of
SAE Grade 8 specification or better.
Fasteners
Frame Fastener Torque Specifications
Table 14 Frame Fastener Torque Specifications
Fastener
Type
Fastener
Size
Torque
Lb. ft. N.m.
Bolt / Locknut /
Hardened Washer
1/2 Inch 86 - 108 117 - 147
5/8 Inch 130 - 163 176 - 221
M12 65 - 85 89 -115
M16 155 -195 210 - 264
M20 315 - 385 427 - 523
CAUTION: When installing bolts on the frame,
use only metric grade 10.9 bolts of the proper
length.
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