Great Plains CTA4000 HD Operator Manual - Manual (Page 37)

Great Plains Manufacturing, Inc. Operating Instructions 33
2012-11-28 160-037M
Opener Operation
The hydraulic system places down pressure on the
openers for consistent soil penetration across the
implement–even in uneven ground.
Refer to Figure 41
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
operation 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 42
3.
Set opener down pressure. There is one
pressure-control valve for wing sections
and one
for center section .
Initially set down pressure at 1400 psi, as indicated
on the gauges
, . Then adjust as field condition
warrant.
For more information on adjusting opener hydraulic
down, refer to See “Sub-Frame Down-Force” on
page 43.
Figure 41
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 59 for ordering.
Figure 42
Set Opener Down-Pressure
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