Fast 973P Series, Operator'S Manual

Page: 58 / 68

58
7.2 BOLT TORQUE
Bolt
Diameter
"A"
1/4"
5/16"
3/8"
7/16"
1/2"
9/16"
5/8"
3/4"
7/8"
1"
(6)
(10)
(20)
(30)
(45)
(70)
(95)
(165)
(170)
(225)
SAE 2
N.m (lb-ft)
SAE 5
N.m (lb-ft)
SAE 8
N.m (lb-ft)
8
13
27
41
61
95
128
225
230
345
12
25
45
72
110
155
215
390
570
850
(9)
(19)
(33)
(53)
(80)
(115)
(160)
(290)
(420)
(630)
17
36
63
100
155
220
305
540
880
1320
(12)
(27)
(45)
(75)
(115)
(165)
(220)
(400)
(650)
(970)
Bolt Torque *
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.
Nut Size
Across
Flats
(in.)
Torque Value*
(N.m) (lb-ft)
Recommended
Turns to Tighten
(After Finger
Tightening)
(Flats) (Turns)
3/16
1/4
5/16
3/8
1/2
5/8
3/4
7/8
7/16
9/16
5/8
11/16
7/8
1
1-1/4
1-3/8
8
12
16
24
46
62
102
122
6
9
12
18
34
46
75
90
1
1
1
1
1
1
3/4
3/4
1/6
1/6
1/6
1/6
1/6
1/6
1/8
1/8
Tube
Size
OD
(in.)
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.
7.3 HYDRAULIC FITTING 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