Great Plains CTA4000 Operator Manual - Manual (Page 31)

Operating Instructions 27
08/03/2010 160-269M-A
Opener Operation
The hydraulic system places down pressure on the
openers for consistent soil penetration across the imple-
ment–even in uneven ground.
Refer to Figure 32
1.
Check implement valve handles. Both valve handles
need to be in FIELD position for the hydraulic down-
pressure and weight-transfer to function.
2. Engage tractor hydraulics for the implement’s lift/fold
circuit. Lock hydraulic lever forward during field oper-
ation for constant hydraulic flow to openers.
Tractor-Specific Circuit Operation
John Deere tractors with Sound-Gard ® Body
Use lever lock clip, John Deere part number R52667,
to lock lever forward. See your tractor dealer for clip
purchase and installation.
John Deere 7000 Series tractors
Rotate valve detent selector to motor position to lock
lever in forward position.
John Deere 8000 Series tractors
Set timer to continuous. Push lever forward until
detent clicks.
Case-IH Magnum tractors
Lock lever forward in detent position. You may need
to turn up detent pressure to its maximum setting.
Do not tie hydraulic lever past detent position with a
strap. See your tractor dealer for hydraulic-system
details.
Other Tractors
Lock lever forward in detent position. You may need
to turn up detent pressure to maximum or use a
mechanical detent holder to hold lever forward. See
your tractor dealer for proper means of providing
constant flow to openers.
Initial Frame Down-Pressure
Refer to Figure 33
3.
Set opener down pressure. There is one pressure-
control valve for wing sections
and one for center
section .
Initially set down pressure at 800 psi, as indicated on
the gauges
, . Then adjust as field condition war-
rant.
For more information on adjusting opener hydraulic
down force, refer to See “Sub-Frame Down-Force”
on page 37.
Figure 32
Planting: Valve Handles
26372
If the tractor has a load-sensing or constant-flow hydraulic
system, the implement must be equipped with an optional
bypass valve to avoid tractor damage. See “Hydraulic Bypass
Kit” on page 53 for ordering.
Figure 33
Set Opener Down-Pressure
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3
4
1
1
2
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