Great Plains Verti-Till Field Update - Manual (Page 14)

14 Verti-Till Field Update Great Plains Manufacturing, Inc.
596-186M 08/06/2007
Install Relief Valve
Assemble Valve
Refer to Figure 24
70. Select one new:
810-348C RELIEF VALVE 1500 PSI TAMP PRF
one new:
811-216C EL 3/4MJIC 9/16MORB
and two new:
811-584C AD 9/16MORB 3/4MJIC
71. Screw the Male O-Ring Bushing (MORB) ends of the
adaptors into the side ports of the valve.
72. Screw the MORB end of the elbow into the bot-
tom/center port of the valve and seat the jam nut.
Open Circuit
The relief valve is plumbed into the transport lift circuit on
the right side of the mainframe, near the right lift cylinder.
!
CAUTION
Open lines first at JIC connectors, and do so slowly, in case
there is any residual pressure in the lines.
Refer to Figure 25
Typical implements may vary from the figure, both in
hose and clamp placement.
73. Trace the hoses and ensure that you understand
which is rod (lower/retract) and which is base (lift/
extend). Usually, the rod circuit is the upper hose
,
and the base circuit is the lower hose .
74. Loosen any clamps necessary to free hoses for dis-
connection and routing adjustments.
75. Crack the hose JIC connectors , just forward of
the tees and bleed off any residual pressure.
Unscrew the JIC connectors completely.
Figure 24
Assemble Relief Valve
27041
16
19
18
19
16
18
19
19
18
Figure 25
Open Circuit
27042
1
2
U
D
F
B
L
R
1
2
1 2