Great Plains CP1000 Assembly Instructions - Manual (Page 16)

14
Section 3 Troubleshooting
CPH and CP1000 Coulter Command System 148-258M-B 9/21/05
Great Plains Mfg., Inc.
Section 3
Troubleshooting
Problem Possible Cause Solution
Coulters move up when the
down switch is operated and
down when the up switch is
operated. Not supplying oil to the "P" port of the
hydraulic valve. Reverse the remote hydraulic lever in the
tractor.
Reverse the hoses at the quick couplers.
Solenoids wired backward or hoses from
port "A" and port "B" reversed at the
hydraulic valve. Unplug solenoids and swap wire leads to
them.
Automatic coulter depth con-
trol stops adjusting coulter
depth. tongue hydraulics switch bumped to
"manual" mode. Flip tongue hydraulics switch back to
"auto" mode.
Tractor remote hydraulic lever not locked
for constant oil supply to valve. Lock Tractor remote hydraulic lever with
rubber tarp strap or other means.
System variables out of adjustment Turn power switch OFF and back on again
so the system variables can reset. Then
flip AUTO-MANUAL switch to AUTO.
Turning the coulter depth knob
does not set coulters deep
enough. If the tongue cylinder runs completely
retracted, the tractor drawbar is to high. Use a straight drawbar or one which
sweeps down.
In extremely hard conditions with the
machine standing the tongue cylinder
pulses but does not retract. This is perfectly normal.The cylinder will
not penetrate the coulters on a stationary
machine in hard conditions.Pull forward
and check coulter depth on a moving
machine.
If the coulter depth knob is turned to "A"
and the tongue cylinder will not com-
pletely retract when moving through the
field then the internal sensor box linkage is
not set correctly. Adjust the sensor box internal linkage. See
"Coulter Command Assembly Adjust-
ments" on page 9.
If the sensor box linkage is properly
adjusted and tongue cylinder constantly
pulses while moving through the field but
the front tongue cylinder will not retract,
you do not have enough system weight. Add weights to the pull hitch frame weight
brackets. Add tool bar weight brackets to
coulter tool bars.
The hydraulic valve constantly
pulses when you are stopped
to refill or adjust something. Hard soil conditions are hindering coulter
penetration while stopped. Flip tongue hydraulics switch to "manual"
mode while you are stopped or turn coulter
command power "off". Pulsing does not
hurt the valve, but can be annoying.
Turning the coulter depth knob
to "E" does not allow the
coulters to run shallow
enough. The internal sensor box linkage is not set
correctly. Adjust the sensor box internal linkage. See
"Coulter Command Assembly Adjust-
ments" on page 9.
Depth sensing gauge wheel
not lifting off the ground when
Center Pivot Hitch is raised. Coulter Command power is OFF or 12 volt
power has been interrupted.
Coulter Command must be connected and
the power must be ON for the depth sens-
ing gauge wheel to raise when the All
Seeds Hitch is raised. The depth sensing
gauge wheel should raise with the trans-
port lift circuit with Coulter Command in
either the AUTO or MANUAL mode is long
as the power is ON.
The lift switch has become disconnected or
the lift switch cam on the right transport lift
cylinder has been damaged. Inspect and adjust the lift switch and push
rod cam. See "Lift Switch" under Section
2 "Operating Instructions" on page 12.
Check cable connections on lift switch
lead.