Troubleshooting 8
TW85 109
Fault Possible cause Remedy
8.10 Hydrostatic travel drive works in one direction only
1 Switch for travel direction damaged Repair or replace
2 Solenoid valve gets stuck or is damaged Check and replace if necessary
3 Power supply towards switch for travel
direction or solenoid valve interrupted
Check and repair (incl. ground connection)
4 Filling circuit – non-return valve defective Check and replace if necessary
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
6 Leak on adjusting piston Inspect positioning pressure on adjusting piston
(behind the floating time nozzle)
7 Mechanical damage to variable
displacement pump and/or engine
Check, call Service Agent if necessary
8.11 Hydrostatic travel drive works in neither direction
1 Too little hydraulic oil in tank Top up oil to mark on the sight glass
2 Mechanical connection to diesel engine
faulty
Check, repair
3 Charge pump damaged, no charge
pressure
Replace variable displacement pump
4 Switch for travel direction damaged Check and replace if necessary
5 Valve for travel direction damaged Check, repair or replace if necessary
6 Power supply towards switch for travel
direction and/or solenoid valve
interrupted
Check and repair
7 Pressure relief valve (supply pressure)
faulty
Check and replace if necessary
8 Suction filter clogged Replace filter
9 Suction line between tank and pump
kinked
Check
10 No or insufficient supply pressure Check pressure and troubleshoot
11 Variable displacement pump activation
interrupted
Check pressure and troubleshoot
12 Mechanical damage to variable
displacement pump and/or engine
Check, call Service Agent if necessary
13 Internal damage to variable displacement
pump or variable displacement motor
Replace unit completely
14 Mechanical connection between variable
displacement motor and axle interrupted
Check, repair
To Next Page
Loading...
