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21. STANDARD TIGHTENING TORQUES
21.3 HYDRAULIC TUBES AND FITTINGS
The torque figures are recommended for plain, cadmium or zinc plated fittings, dry or wet installations.
Swivel nuts
either swaged or brazed. Figures are for tube nuts used with 37" flared fittings and JIC - 37" seat O-Ring boss plugs
and swivel nuts.
21.4 HOSE CLAMPS
21.5 SPLIT FLANGE CONNECTIONS
The following
chart provides the tightening
torques for
hose clamps used in all rubber applications
(radiator, air
cleaner,
operating
lever boots, hydraulic
system, fuel
systems etc.).
The following chart provides the tightening
torques for
split flange
connections
used in hydraulic
systems.
Flanges and fitting shoulders should fit squarely. Install
all bolts, finger tight, then torque evenly. Over torquing
bolts will damage the flanges and/or bolts, which may
cause leakage.
I
TORQUE f 0.6 Nom (5 Ibf
in)
CLAMP
RADIATOR,
AIR
TYPE AND
CLEANER, BOOTS,
SIZE
HYDRAULIC
SYSTEM
Nom
1
Ibf
in
T Bolt
Worm Drive -
1-X in Open
Diameter
and Under
Worm Drive
- Over 1-X in
Open Diame-
ter
Worm Drive -
All Ultra-Tite
6.2 to 7.3
2.2 to 3.3
4.5 to 5.6
10.7
to
112
55 to 65
20 to 30
40 to 50
95 to 105
4.5 to 5.6
4.5 to 5.6
-_--_
40 to 51
40 to 5(
FLANGE
SIZE
112
BOLT
SIZE
5/l 6
BOLT TORQUE
Nom
Ibfft
20 to 24
15tol8
II
314
I
318
1
30 to 37
1
22 to 27 11
1
318
37 to 47
27 to 35
l-l/4
7116
47 to 61
35 to 45
l-l/2
II2
62 to 79
46 to 58
II
2
I
"2
l
75 to 88
1
55 to 65 11
3-l 8
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