38
MAINTENANCE
Read all of SAFETY and this section before attempting any procedure. Pay particular attention to Notices, Cautions, Warnings and Dangers.
Owner’s Guide
HARDWARE
Normally, three classes of standard hardware and three classes of metric hardware are used in the vehicle. Grade 5
hardware is identified by the three marks on the hexagonal head; grade 8 hardware is identified by six marks on the
head; grade 2 hardware is not marked. The class specification is marked on metric hardware.
Inspect the vehicle for loose fasteners periodically. The fasteners must be tightened carefully and according to the
Torque Specifications table or as specified in the Repair and Service Manual.
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
Torque Specifications and Bolt Grades
