Great Plains CP1000 Assembly Instructions - Manual (Page 13)

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Section 2 Operating Instructions
9/21/05 CPH and CP1000 Coulter Command System 148-258M-B
Great Plains Mfg., Inc.
The CPH transport hydraulic circuit contains the hoses
from the ports marked "V1" and "V2". This circuit must
be connected to one of the remaining circuits for raising
and lowering the transport system. This circuit must re-
ceive hydraulic pressure for raising the machine even
while the hydraulic tongue circuit is "locked in" for contin-
uous use. If the machine will not raise when the hydraulic
tongue circuit is "locked in," consult your tractor dealer.
You may need to run the transport hydraulic circuit on a
"priority circuit" and the hydraulic tongue circuit on an al-
ternate remote if the tractor hydraulics allows live
hydraulic power to other remotes. If the "priority circuit"
is the only circuit suitable for HYDRAULIC MOTOR
CONTROL, then run the transport hydraulic circuit on
the "priority circuit" and run the hydraulic tongue circuit
on an alternate remote with the Coulter Command valve
in the OPEN CENTER MODE. See "Tractors with open
center hydraulic systems or fixed displacement hy-
draulic pumps" below.
Tractors with open center hydraulic systems or
fixed displacement hydraulic pumps.
(If you are not familiar with your tractor's hydraulics, con-
sult your tractor dealer.)
For tractors with open-center hydraulics or on tractors
with fixed displacement hydraulic pumps turn the
knurled control knob on the left side of the hydraulic
valve completely counterclockwise and lock it in place
with the circular lock disk. Be sure the lock disk is
snugged to prevent the control knob from vibrating loose
in field operation.
The CPH transport hydraulic circuit contains the hoses
from the ports marked "V1" and "V2". This circuit must
be connected to tractor's "priority circuit" to supply hy-
draulic pressure for raising the machine even while the
hydraulic tongue circuit is "locked in" for continuous use.
The "No.1" hydraulic circuit on most open-center tractors
is the priority circuit.
The tongue cylinder hydraulic circuit consists of the hos-
es from ports "P" and "T". Connect "P" and "T" to a circuit
other than the "priority circuit". Once the hydraulic valve
is set for OPEN CENTER operation, the Coulter Com-
mand tongue cylinder circuit requires live hydraulic
power supplied to the port labeled "P". This is accom-
plished by pushing FORWARD on the tractor remote
hydraulic lever and LOCKING IT OPEN in this position.
The remote tractor hydraulic lever will have to be locked
in position to supply oil to the "P" port of the hydraulic
control valve, regardless of whether you want to control
the tongue hydraulic cylinder manually or automatically.
The Coulter Command tongue hydraulic circuit requires
a flow rate of 8 to 12 gallons per minute for efficient op-
eration. On high flow rate tractors, turn down the flow
rate on the tractor remote, if possible, so as not to ex-
ceed 12 gallons per minute. Flow rates higher than 12
gallons per minute will increase the heat generated by
the Coulter Command circuit when it circulates this high
flow of oil.
Refer to Figure 9
When operating the Coulter Command tongue hydraulic
circuit in the OPEN CENTER mode, use poppet style
quick couplers on the hoses connecting to the tractor.
These quick couplers allow better flow through some
tractor remotes and may produce less heat when circu-
lating continuous hydraulic flow through them. Parker
Hannifin offers the poppet style Pioneer quick coupler in
their 8010 Series couplers. For tractors with Pioneer
quick couplers use Pioneer 8010-4P poppet style male
couplers when operating in the OPEN CENTER mode.
Figure 9
Quick Couplers
Poppet Style Ball Style
16316