Case 750L, Руководство по ремонту

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General specification
BOLT TORQUE INFORMATION
DECIMAL HARDWARE
INTRODUCTION
1. Fasteners should be replaced with the same or higher grade. If higher grade fasteners are used, these should
only be tightened to the strength of the original.
2. Make sure the fasteners threads are clean and that thread engagement is started. This will prevent them from
failing when being tightened.
3. Tighten plastic insert or crimped steel-type lock nuts to approximately 50 % of the dry torque, applied to the nut,
not to the bolt head. Tighten toothed or serrated-type lock nuts to the full torque value.
4. The L9 (Alloy) fasteners torque values are for a bolt, nut, and two washers.
When using L9 (Alloy) fasteners, do not use the values in this table for tapped holes.
GRADE
1 or2 5
15.1 15.2 8 18.2 L9 fAllovl
SAE Markings
0
lg
Q3
e
©
e
�
for Bolts and
Cap Screws
2
SAE Markings
©
for Hex Nuts
GRADE2*
Dry**
Lubricated
**
SIZE Nm lb/ft Nm lb/ft
1/4 7.5 5.5 5.7 4.2
UNF
1/4 8.5 6.3 6.4 4.7
UNC
5/16 15 11 11 8
UNF
5/16 16 12 12 9
UNC
3/8 27 20 20 15
UNF
3/8 31 23 23 17
UNC
7/16 43 32 33 24
UNF
7/16 49 36 37 27
UNC
1/2 68 50 47 35
UNF
1/2 75 55 54 40
UNC
9/16 95 70 75 55
UNF
9/16 108 80 81 60
UNC
5/8 136 100 102 75
UNF
5 8
@
�
GRADE 5, 5.1 or 5.2
GRADE 8 or 8.2
Dry
**
Nm
10.8
13.6
23
26
41
47
68
75
102
115
149
163
203
Lubricated Dry**
**
lb/ft Nm lb/ft Nm
8
10
17
19
30
35
50
55
75
85
110
120
150
8.5 6.3 16.3
9.8 7.2 19
18 13 33
19 14 37
31 23 61
34 25 68
47 35 95
54 40 108
75 55 149
88 65 163
108 80 203
122 90 231
149 110 285
87728445 1 2/28/2008
7
Lubricated
**
lb/ft Nm lb/ft
12 12.2 9
14 13.6 10
24 24 18
27 27 20
45 47 35
50 47 35
70 68 50
80 81 60
110 108 80
120 122 90
150 149 110
170 176 130
210 217 160
L9 (Alloy)
C
GRADE L9 Alloy)
Head Nut
Nm lb/ft Nm
13.6 10 14.9
16.3 12 17.6
26 19 28
27 20 31
41 30 45
47 35 52
75 55 81
81 60 88
115 85 129
129 95 142
163 120 190
183 135 203
231 170 251
lb/ft
11
13
21
23
33
38
60
65
95
105
140
150
185