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OPERATION AND SERVICE INFORMATION
3-39
Read all of manual to become thoroughly familiar with this vehicle. Pay particular attention to all Notes, Cautions and Warnings
Generally, three grades of hardware are used in the vehicle. Grade 5
hardware can be identified by the three marks on the hexagonal head
and grade 8 hardware is identified by 6 marks on the head. Unmarked
hardware is Grade 2 (Ref Fig. 37 on page 3-39).
Fig. 37 Torque Specifications and Bolt Grades
ALL TORQUE FIGURES ARE IN FT. LBS. (Nm)
BOLT SIZE
Grade 2
1/4" 5/16" 3/8" 7/16" 1/2" 9/16" 5/8" 3/4" 7/8" 1"
Unless otherwise noted in text, tighten all hardware in accordance with this chart.
This chart specifies 'lubricated' torque figures. Fasteners that are plated or lubricated when
installed are considered 'wet' and require approximately 80% of the torque required for 'dry' fasteners.
4
(5)
8
(11)
15
(20)
24
(33)
35
(47)
55
(75)
75
(102)
130
(176)
125
(169)
190
(258)
Grade 5
Grade 8
6
(8)
13
(18)
23
(31)
35
(47)
55
(75)
80
(108)
110
(149)
200
(271)
320
(434)
480
(651)
6
(8)
18
(24)
35
(47)
55
(75)
80
(108)
110
(149)
170
(230)
280
(380)
460
(624)
680
(922)
BOLT SIZE
Class 5.8
(Grade 2)
M4 M5 M6 M8 M10 M12 M14
1
(2)
2
(3)
4
(6)
10
(14)
20
(27)
35
(47)
55
(76.4)
Class 8.8
(Grade 5)
2
(3)
4
(6)
7
(10)
18
(24)
35
(47)
61
(83)
97
(131)
Class 10.9
(Grade 8)
3
(4)
6
(8)
10
(14)
25
(34)
49
(66)
86
(117)
136
(184)
5.8
8.8
10.9