Toro 02750 Operator's Manual page 68

1.68
FAULT
After initial satisfactory
operation machine loses
power.
Cylinder 'knocks' while
rotating
One cylinder rotates
slowly
Cutterhead fails to lift out
of work
Cutterheads do not follow
ground contours
TROUBLE SHOOTING
POSSIBLE CAUSE
Worn pump or motor
Low hydraulic oil level
Incorrect oil viscosity
Oil filter element blocked
Faulty pressure relief valve
Overheating
Leaks on suction hose
High spot on cylinder or bottom blade due
to contact with foreign object
Worn cylinder bearings
Cutting cylinder bearing seized
Incorrect rotation motor fitted
Diverter valve only partly open
Motor integral check valve jammed open
Cutting cylinder tight on the bottom blade
Motor worn
Lift cylinder seal failure
Pressure relief valve jammed open or
wrongly set
Defective control valve
Mechanical blockage
Incorrect hose routing or incorrect
orientation of hydraulic fittings
Tightness in pivots
Mower operated in 'hold' position
Weight transfer set too high
REMEDY
Replace as necessary
Fill hydraulic oil tank to correct level
Renew oil in hydraulic tank with hydraulic
oil of correct viscosity grade, refer to
SPECIFICATIONS
Change filter element
Have relief valve cleaned and pressure
checked. Consult your authorised dealer
Check cylinder to bottom blade adjustment.
Reduce work rate i.e. increase height of cut
or reduce forward speed
Incorrect hydraulic oil grade, refer - Problem
'Hydraulic Oil System Overheating'
Check and tighten fittings. Replace hose if
necessary
Remove high spot with a stone and back lap
to restore cutting edges. Serious damage will
require re grinding
Replace as necessary
Replace as necessary
Check motor and replace if necessary
Free off and lubricate or replace diverter
valve as necessary
Have check valve cleaned and checked
Readjust setting
Replace motor
Replace seals
Have relief valve cleaned and pressure
checked. Consult your authorised dealer
Overhaul control valve
Remove blockage
Move cutterheads throughout extremes of
movement and observe any tightness in the
hoses. Correctly route hoses and orientate
fittings as necessary
Free off and grease as necessary
Move position control lever to 'down/float'
position
Reduce weight transfer
1.68