Troubleshooting 8
TW9 99
Fault Possible cause Remedy
8.9 Transmission works in one direction only
1 Switch for travel direction damaged Repair or replace if necessary
2 Solenoid valve gets stuck or is damaged Repair or replace if necessary
3 Power supply towards switch for travel
direction or solenoid valve interrupted
Check and repair (incl. ground connection)
4 Pilot pressure too low on one side Nozzles clogged, check, repair
5 High-pressure relief valve is faulty or
incorrectly adjusted
Swap valves around. If machine now travels in
the other direction, examine valve, clean and
replace if necessary
8.10 Transmission works in neither direction
1 Too little hydraulic oil in tank Top up oil to mark on dipstick
2 Mechanical connection to diesel engine
faulty
Check, repair
3 Charge pump damaged, no charge
pressure
Remove pump and examine, install new pump if
necessary
4 Switch for travel direction damaged Repair or replace if necessary
5 Solenoid valve for travel direction
damaged
Repair or replace if necessary
6 Suction filter clogged Replace filter
7 Suction line between tank and pump
kinked
Check and eliminate kink
8 Power supply towards switch for travel
direction and solenoid valve interrupted
Remedy cause of interruption
9 Internal damage to travel pump or travel
motor
Replace units completely
10 Mechanical connection between travel
motor and axle interrupted
Check, repair
8.11 Loader installation is not working
1 Oil supply to pump interrupted Check suction line and repair if required
2 Main pressure relief valve damaged Check and replace if necessary
3 Hydraulic pump damaged Check, repair or replace
4 Hydraulic pump drive mechanically
interrupted
Check and repair
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