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UT3030-UT5052
Appendix
Great Plains
| 576-026M-A | 05/11/2021
27
Hydraulic Connectors and Torque
Refer to Figure 16 (a hypothetical fitting)
Leave any protective caps in place until immediately prior to
making a connection.
1
NPT
- National Pipe Thread
Note tapered threads, no cone/flare, and no O
-
ring.
Apply liquid pipe sealant for hydraulic applications.
Do not use tape sealant, which can clog a filter and/or plug an
orifice.
2
JIC
- Joint Industry Conference (SAE J514)
Note straight threads (4) and the 37
cone (5) on “M” fittings (or
37
flare on “F” fittings).
Use no sealants (tape or liquid) on JIC fittings.
3
ORB
- O
-
Ring Boss (SAE J514)
Note straight threads (5) and elastomer O
-
Ring (7).
Prior to installation, to prevent abrasion during tightening,
lubricate O
-
Ring with clean hydraulic fluid.
Use no sealants (tape or liquid) on ORB fittings.
ORB fittings that need orientation, such as the ell depicted, also
have a washer (8) and jam nut (9) (“adjustable thread port stud”).
Back jam nut away from washer. Thread fitting into receptacle
until O
-
Ring contacts seat. Unscrew fitting to desired orientation.
Tighten jam nut to torque specification.
2
5
4
9
8
7
5
3
Figure 16
Hydraulic Connector ID
31282
Fittings Torque Values
Dash
Size
Fitting
N-m
Ft-Lbs
-4
1
4
-18 NPT
1.5-3.0 turns past finger tight
-5
1
2
-20 JIC
19-20
14-15
-5
1
2
-20 ORB w/jam nut
12-16
9-12
-5
1
2
-20 ORB straight
19-26
14-19
-6
5
16
-18 JIC
24-27
18-20
-6
5
16
-18 ORB w/jam nut
16-22
12-16
-6
5
16
-18 ORB straight
24-33
18-24
-8
3
4
-16 JIC
37-53
27-39
-8
3
4
-16 ORB w/jam nut
27-41
20-30
-8
3
4
-16 ORB straight
37-58
27-43
1
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