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7.2 BOLT TORQUE
CHECKING BOLT TORQUE
The tables shown below give correct torque values for various bolts and capscrews. Tighten all bolts to
the torques specified in chart unless otherwise noted. Check tightness of bolts periodically, using bolt
torque chart as a guide. Replace hardware with the same strength bolt.
ENGLISH TORQUE SPECIFICATIONS
Bolt
Diameter
SAE 2
"A"
N.m
(lb-ft)
1/4"
8
(10)
5/16"
13
(20)
3/8"
27
(30)
7/16"
41
(45)
1/2"
61
(70)
9/16"
95
(95)
5/8"
128
(165)
3/4"
225
(170)
7/8"
230
(225)
1"
345
Torque figures indicated above are valid for non-greased or non-oiled threads and heads unless other-
wise specified. Therefore, do not grease or oil bolts or capscrews unless otherwise specified in this
manual. When using locking elements, increase torque values by 5%.
* Torque value for bolts and capscrews are identified by their head markings.
7.3
HYDRAULIC FITTING TORQUE
TIGHTENING FLARE TYPE TUBE FITTINGS *
1. Check flare and flare seat for defects that
might cause leakage.
2. Align tube with fitting before tightening.
3. Lubricate connection and hand tighten
swivel nut until snug.
4. To prevent twisting the tube(s), use two
wrenches. Place one wrench on the
connector body and with the second
tighten the swivel nut to the torque shown.
* The torque values shown are based on
lubricated connections as in reassembly.
58
Bolt Torque *
SAE 5
N.m
(lb-ft)
(6)
12
(9)
25
(19)
45
(33)
72
(53)
100
110
(80)
155
155
(115)
220
215
(160)
305
390
(290)
540
570
(420)
880
850
(630)
1320
SAE 8
N.m
(lb-ft)
17
(12)
36
(27)
63
(45)
(75)
(115)
(165)
(220)
(400)
(650)
(970)
Nut Size
Across
Tube
Flats
Size
OD
(in.)
(in.)
7/16
3/16
1/4
9/16
5/16
5/8
11/16
3/8
7/8
1/2
5/8
1
3/4
1-1/4
1-3/8
7/8
Recommended
Turns to Tighten
(After Finger
Tightening)
Torque Value*
(N.m) (lb-ft)
(Flats) (Turns)
8
6
1
12
9
1
16
12
1
24
18
1
46
34
1
62
46
1
102
75
3/4
122
90
3/4
1/6
1/6
1/6
1/6
1/6
1/6
1/8
1/8
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