Great Plains 4000TM Assembly Manual - Manual (Page 44)

40 1800-3000TM Table of Contents Index Great Plains Manufacturing, Inc.
586-536E Table of Contents Index 04/12/2013
Hydraulic Connectors and Torque
Refer to Figure 37 (a hypothetical fitting)
Leave any protective caps in place until immediately prior
to making a connection.
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.
JIC - Joint Industry Conference (SAE J514)
Note straight threads
and the 37
° cone on
“M” fittings (or 37
° flare on “F” fittings).
Use no sealants (tape or liquid) on JIC fittings.
ORB - O-Ring Boss (SAE J514)
Note straight threads
and elastomer O-Ring .
Prior to installation, to prevent abrasion during tight-
ening, 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
and jam nut
(“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 37
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
1
2
4 5
3
5 7
8 9