Transmission Works In One Direction Only; Transmission Works In Neither Direction; Loader Installation Is Not Working - Terex TL80 Operating Instructions Manual

Fault Possible cause

8.9 Transmission works in one direction only

1 Switch for travel direction damaged
2 Solenoid valve gets stuck or is damaged
3 Power supply towards switch for travel
direction or solenoid valve interrupted
4 Pilot pressure too low on one side
5 High-pressure relief valve is faulty or
incorrectly adjusted

8.10 Transmission works in neither direction

1 Too little hydraulic oil in tank
2 Mechanical connection to diesel engine
faulty
3 Charge
pressure
4 Switch for travel direction damaged
5 Solenoid
damaged
6 Suction filter clogged
7 Suction line between tank and pump
kinked
8 Power supply towards switch for travel
direction and solenoid valve interrupted
9 Internal damage to travel pump or travel
motor
10 Mechanical connection between travel
motor and axle interrupted

8.11 Loader installation is not working

1 Oil supply to pump interrupted
2 Main pressure relief valve damaged
3 Hydraulic pump damaged
4 Hydraulic
interrupted
TL80
pump damaged, no
valve for travel
pump drive mechanically
Remedy
Repair or replace if necessary
Repair or replace if necessary
Check and repair (incl. ground connection)
Nozzles clogged, check, repair
Swap valves around. If machine now travels in
the other direction, examine valve, clean and
replace if necessary
Top up oil to mark on dipstick
Check, repair
charge Remove pump and examine, install new pump if
necessary
Repair or replace if necessary
direction Repair or replace if necessary
Replace filter
Check and eliminate kink
Remedy cause of interruption
Replace units completely
Check, repair
Check suction line and repair if required
Check and replace if necessary
Check, repair or replace
Check and repair
Troubleshooting 8
99