Great Plains YP925TD Assembly Instructions - Manual (Page 20)

20 Flat Fold Marker Front Appendix Great Plains Mfg., Inc.
113-870M Front Appendix 2012-22-03
Set Initial Extension
118. Set the approximate initial marker extension per the
instructions in the Operator manual. Because the
implement is typically not into the ground at this
time, the setting is approximate.
Close-Out
119. Lubricate markers. Pump grease at all grease zerks
until grease emerges.
120. Fold the markers.
Marker Operation
Marker operation is covered in the planter Operator
manual.
Marker Maintenance
Marker maintenance is covered in the planter Operator
manual.
Appendix
Hydraulic Connector Identification
Refer to Figure 27 (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 PTFE
a
liquid or paste pipe sealant for hydraulic
applications (do not use tape sealant, which can foul
filters).
a PTFE: polytetrafluoroethylene, such as DUPONT ® Teflon ® .
Great Plains recommends RectorSeal ® No.5 ® , available in
1 ⁄
2
pint (236 ml) cans as part number 891-231C.
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
tightening, lubricate O-ring with clean hydraulic fluid.
Use no sealants (tape or liquid) on JIC 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 27
Hydraulic Connector Ports
31282
Fittings Torque Values
Fitting Ft-Lbs N-m
1 ⁄
4
NPT 1.5-3.0 turns past finger tight
9 ⁄
16
JIC 18-20 24-27
9 ⁄
16
ORB w/jam nut 12-16 16-22
9 ⁄
16
ORB straight 18-24 24-32
3 ⁄
4
JIC 27-39 37-53
3 ⁄
4
ORB w/jam nut 20-30 27-41
3 ⁄
4
ORB straight 27-43 37-58
1
1
2
4 5
3
5 7
8 9