New Leader L5034G4 Operator's Manual page 38

Troubleshooting
Header
Reason:
1. Hydraulic oil level low.
2. Shut Off valve on oil reservoir not open.
3. Hydraulic Pump is not rotating.
4. Worn pump.
5. Conveyor relief valve open to return line. Using relief valve testing adapter and fl ow meter, test
6. Jammed or frozen spinner motors.
7. Jammed or frozen conveyor.
8. Defective radar.
9. Control processor's power is in "Off"
position.
10. In line relief valve set too low.
11. Jammed or frozen conveyor hydraulic
motor.
12. Conveyor hydraulic motor shaft key
sheared.
13. Pump speed is not adequate to provide
suffi cient fl ow to maintain spinner speed.
14. Insuffi cient hydraulic oil fl ow at normal
driving speeds.
15. Defective spinner control valve.
305438-I
Correction:
Add hydraulic oil to reservoir to maintain level around
mid-point of sight gauge.
Open valve fully by turning counter clockwise until it
stops.
1. PTO is disengaged. Shift into engagement.
2. Drive line has failed. Repair or replace.
3. Key in pump shaft has failed. Replace key.
4. U-joint pin or key has failed. Replace pin or key.
With fl ow meter arranged to check relief valve setting
above, open load valve fully. Read fl ow rate with truck
engine running at max RPM. Close load valve until
pressure reads 1000 PSI (69 bar). Flow rate should not
decrease more than three (3) GPM. If fl ow loss is greater,
replace pump.
valve for opening pressure. If not 3100 PSI (214 bar),
replace relief valve.
Free up. If not possible, replace as required.
Free up conveyor.
Check speed on console. Repair or replace radar as
required.
Turn on control processor.
In line relief valve pressure should be 3100 PSI (214 bar).
Set spinner control valve to "0". Disconnect pressure line,
coming from rear port on spinner control valve, at control.
Reconnect this line to fl ow meter inlet port. Disconnect
return line from control where it joins the return tube
running to the reservoir. Connect fl ow meter load valve
to return tube. Open load valve fully, run truck engine at
max RPM. Slowly close load valve until pressure reaches
3100 PSI (214 bar). If this pressure cannot be reached,
set up relief valve adjustment until gauge reads 3100 PSI
(214 bar).
CAUTION: Do not set pressure above 3100 PSI (214 bar).
Replace motor.
Replace key.
Increase engine speed or resize hydraulic pump to meet
system requirements.
Check PTO-Pump matching. If insuffi cient fl ow results,
install higher percent PTO or use larger pump (Special).
Replace valve metering spool spring. If no improvement,
replace spinner control valve.
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L5034G4
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(800) 363-1771