21
GB
TROUBLESHOOTING
SECTION
7
SYMPTOMS CAUSES REMEDIES
1) No oil pressure in main
lubrication circuit in neu-
tral or drive positions
1 - No oil in gearcase
2 - Suction filter completely clogged
3 - Pump drive coupling broken
- Fill with oil
- Remove and clean filter
- Remove pump and replace coupling
1 - Oil level too low
2 - Incorrect position of gear shift lever
3 - Suction filter partially clogged
4 - Incorrect oil type
5 - Trolling lever in trolling range (if present)
2) Low oil pressure with
drive engaged
- Top up to level indicated
- Adjust control linkage
- Remove and clean filter
- Drain gearbox and fill with correct grade
- Deselect trolling mode
You are advised to contact authorised ZF service centres to rectify the points marked with this symbol.
3) High oil
temperature
1 - Water flow rate in oil cooler too low
2 - Oil cooler dirty
3 - Oil level too high or too low
4 - Incorrect oil type
5 - Clutch slipping
- Replace valves and pipelines with others
of larger internal diameter
- Clean oil cooler
- Restore normal level
- Drain gearbox and fill with correct grade
- Check operating pressure
4) Oil level fluctuating
1 - Inefficient or erratic oil/water heat exchange
- Replace oil cooler
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