Malfunction
Traction does
not work
Irregular engine
speed, engine stop
function does
not work
D 41 42
Cause
Travel drive fuse defective
Power supply interrupted
Travel drive monitoring
(type-specific) defective
Electro-hydraulic servo unit
of the pump defective
Insufficient supply pressure
Drive shaft of hydraulic
pumps or engines broken
Fuel level too low
Fuse "engine speed con-
trol" defective
Electrical power defect
(line break or short circuit)
Remedy
Replace (fuse strip on the oper-
ating panel)
Check potentiometer, cables,
connectors; replace if necessary
Replace
Replace the servo unit
Check and adjust if necessary
Check the suction filter; replace
the supply pump and the filter
if necessary
Replace pump or engine
Check the fuel level; refill fuel
if necessary
Replace (fuse strip on the
operating panel)
Check potentiometer, cables,
connectors; replace if necessary