New Leader L4000G4 Manual page 77

Troubleshooting Header
Symptom:
Conveyor will not run
Conveyor will not shut
off
Conveyor runs erratic
Bin will not hit target
rate
Hydraulics over-heating
Oil cooler fan failure
Bin level sensors not
working properly
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(800) 363-1771
Reason:
Defective conveyor control
valve
No voltage at valve
No hydraulic fl ow
Defective conveyor cartridge
Control valve is out of time
Defective conveyor cartridge
Encoder failure
Encoder harness failure
Rates smooting is disabled
Defective conveyor cartridge
Pump failure
Going over relief
Encoder failure
Encoder harness failure
Pump failure
Too much fl ow
System relief
Conveyor valve relief
Oil cooler fan failure
Case drain is plugged.
No power at fan
Fan failure
Not enabled
Bin level sensor failure
Bin level sensor harness failure
Correction:
Replace conveyor valve cartridge.
Verify bin switch and master switches on.
Verify in controller that target rate, density, ground
speed and a CFR number are all entered.
Check WSM 7.5 amp fuse is not blown.
Verify conveyor control harness is not damaged.
Verify hydraulics are on.
Pressure test pump - replace as needed.
System is going over relief - test & replace as needed.
Conveyor is going over relief - test & replace as
needed.
Replace conveyor control valve cartridge.
Adjust cartridge timing.
Replace conveyor control valve cartridge.
Replace encoder.
Replace harness.
Enable rate smoothing.
Replace conveyor control valve cartridge.
Flow and pressure test pump.
Adjust setting and speed. Pressure test relief (adjust
or replace as needed).
Replace encoder.
Replace harness.
Flow and pressure test pump.
Flow test pump.
Pressure test relief (adjust or replace as needed).
Adjust settings and speed.
Pressure test relief (adjust or replace as needed).
Adjust settings and speed.
see oil cooler fan failures.
Case drain requires zero pressure line back to tank.
Verify FAN 30-amp fuse is not blown. Verify relay is
working properly.
Replace fan.
Verify system was confi gured with bin level sensors.
Replace sensor.
Replace harness.
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L4000G4
307074-AA-I