Operating Manual

218
FAULTS AND REMEDIAL ACTIONS
Fault-module
Fault-module
Fault-module
Fault-module
Valve for mechanical speed limitation either
faulty or incorrectly set.
Replace valve.
Fuel filter soiled. Replace filter box. Bleed air from the fuel system.
Intercooler pressure too low. Check the charge air pressure.
10. Tractor does not pull
Cause
Remedial Action
Feed quantity too flow. Measure feed and outlet pressure.
Leak in the main circuit. Measure feed and outlet pressure.
High-pressure limiting valve does not shut. Measure control pressure.
Flush valve stuck open. Drive in opposite direction of travel.
11. System pressure too low
Cause
Remedial Action
No feed for servo pump. Check lubricating pressure.
Servo pump does not deliver. Check servo pump pressure.
Leakage in pressure or suction line. Check oil level in clutch housing (too high).
40 bar pressure limiting valve does not close. Measure servo pump pressure (= lubrication
pressure).
18 bar pressure control valve does not close. Measure feed pressure (= system pressure).
Leak in comfort circuit. Measure feed pressure, visual check.
12. Inlet pressure too low
Cause
Remedial Action
No feed for servo pump. Check lubricating pressure (= 0)
Servo pressure less than 18 bar. Measure servo pressure.
Leak in comfort circuit. Measure servo pressure, visual check.
Leak in feed line. Measure output pressure (too low).
Leak in outlet line. Measure output pressure (too low).
Hydrostatic drive leaks or lifts off. Measure output pressure (too low).
High-pressure valve is loose. Measure output pressure (too low).
Output pressure control valve does not shut. Measure output pressure (too low).
Input pressure control valve does not shut. Measure output pressure (= input pressure).
13. Output pressure too low
Cause
Remedial Action
Input pressure too low. Measure input pressure (too low).
Leak in outlet line. Measure input pressure (under load too low,
without load OK).
9. Tractor no longer reaches maximum speed