9 - MAINTENANCE
37
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Template Name: OML_1_col
Rac 0-00000
Template Date: 1997_02_12
STANDARD TORQUE DATA FOR HYDRAULIC TUBES AND FITTINGS
Above torque figures are recommended for plain, cadmium or zinc plated fittings, dry or wet installations and
swivel nuts either swagged or brazed. These torques are not recommended for tubes 1/2 inch (12.7 mm) O.D.
and larger with wall thickness of 0.035 inch (0.889 mm) or less. The torque is specified for 0.035 inch (0.889
mm) wall tubes on each application individually.
SPECIAL TORQUES
Wheel Lug Bolts ........................................................................................................ 80 to 100 lb ft (109 to 136 Nm)
Plow Bottom Bolts .......................................................................................................................... 200 lb ft (271 Nm)
TUBE NUTS
FOR 37° FLARED FITTINGS
O-RING BOSS PLUGS,
ADJUSTABLE FITTING
LOCK NUTS, SWIVEL
JIC - 37° SEATS
SIZE
TUBING O.D.
THREAD
SIZE
LB FT
Nm
LB FT
Nm
Inches
mm
Min.
Max.
Min.
Max.
Min.
Max.
Min.
Max.
4
1/4
6.4
7/16-20
9
12
12
16
6
10
8
14
5
5/16
7.9
1/2-20
12
15
16
20
10
15
14
20
6
3/8
9.5
9/16-18
21
24
29
33
15
20
20
27
8
1/2
12.7
3/4-18
35
40
47
54
25
30
34
41
10
5/8
15.9
7/8-14
53
58
72
79
35
40
47
54
12
3/4
19.1
1-1/16-12
77
82
104
111
60
70
81
95
14
7/8
22.2
1-3/16-12
90
100
122
136
70
80
95
109
16
1
25.4
1-5/16-12
110
120
149
163
80
90
108
122
20
1-1/4
31.8
1-5/8-12
140
150
190
204
95
115
129
156
24
1-1/2
38.1
1-7/8-12
160
175
217
237
120
140
163
190
32
2
50.8
2-1/2-12
225
240
305
325
250
300
339
407
WARNING:
Hydraulic oil or diesel fuel leaking under pressure can
penetrate the skin and cause infection or other injury.
To Prevent Personal Injury:
Relieve all pressure, before disconnecting fluid lines or working on the
hydraulic system.
Before applying pressure, make sure all connections are tight and
components are in good condition.
Never use your hand to check for suspected leaks under pressure. Use a
piece of cardboard or wood for this purpose.
If injured by leaking fluid, see your doctor immediately.
M149C
!
