Great Plains CP1000 Assembly Instructions - Manual (Page 18)

16
Section 3 Troubleshooting
CPH and CP1000 Coulter Command System 148-258M-B 9/21/05
Great Plains Mfg., Inc.
Transport lift cylinders will not
lift the Center Pivot Hitch for
transport. OPEN-CENTER tractors with multiple
sets of hydraulic outlets use the #1 cir-
cuit for priority flow which slows down
or cuts off flow to the other circuits. This
problem will occur if Coulter Command
ports "P" and "T" are plugged into the
#1 circuit. Connect transport lift circuit ports "V1" and
"V2" to the #1 hydraulic circuit on OPEN-
CENTER tractors. Ports "P" and "T" of the
Coulter Command hydraulics should con-
nect to another circuit other than the #1 cir-
cuit on OPEN-CENTER tractors.
On CLOSED-CENTER tractors the
Coulter Command should be connect-
ed to a circuit capable of HYDRAULIC
MOTOR CONTROL for supplying con-
stant pressure/flow to remote locations.
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 cir-
cuit on a "priority circuit" and the
hydraulic tongue circuit on an alternate
remote if the tractor hydraulics allows
live hydraulic power to other remotes. On CLOSED-CENTER tractors, if the
"priority circuit" is the only circuit suit-
able for HYDRAULIC MOTOR
CONTROL or supplying constant pres-
sure/flow to remote locations, 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 hydraulic
pumps," page 11.
Problem Possible Cause Solution