Lull 6K Service Manual User Manual
Page 81
General Maintenance
Service Manual — Models 644B, 6K, 844C, 8K, 1044C, 10K
3-13
Hydraulic Fitting Torques
JIC and SAE Female
Swivel Nuts
It is recommended that the nut be torqued to the approximate minimum
value. If leakage occurs, tighten nut without exceeding maximum torque
value.
Note:
Use two wrenches to tighten hydraulic line nuts.
Table 3-7: Torque for JIC and SAE Female Swivel Nuts
Non-adjustable O-ring
Fittings
To install straight thread, non-adjustable O-ring fittings:
1. Check condition of O-ring and replace as necessary. Do not install a
fitting with a damaged O-ring.
2. Lubricate O-ring with clean hydraulic fluid and torque per Table 3-8.
Table 3-8: Torque for Non-adjustable O-ring Fittings
Size
SAE Port
Thread Size
Approx. Min.
Torque
Max. Torque
Flats
1
1. Number of flats on nut to be turned past finger tight. This
method will produce the approximate torque.
-4
7/16-20
130
in-lbs
150
in-lbs
2
-5
1/2-20
165
"
195
"
2
-6
9/16-18
235
"
265
"
1 1/4
-8
3/4-16
44
ft-lbs
48
ft-lbs
1
-10
7/8-14
50
"
58
"
1
-12
1 1/16-12
79
"
88
"
1
-16
1 5/16-12
117
"
125
"
1
-20
1 5/8-12
158
"
175
"
1
-24
1 7/8-12
188
"
213
"
1
-32
2 1/2-12
250
"
283
"
1
Size
SAE Port
Thread Size
Min. Torque Max. Torque
-2
5/16-24
85
in-lbs
95
in-lbs
-4
7/16-20
205
"
235
"
-6
9/16-18
25
ft-lbs
29
ft-lbs
-8
3/4-16
46
"
50
"
-10
7/8-14
85
"
95
"
-12
1 1/16-12
105
"
115
"
-16
1 5/16-12
154
"
166
"
-20
1 5/8-12
213
"
237
"
-24
1 7/8-12
238
"
262
"