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1.76
FAULT
Cylinder 'knocks' while
rotating
One cylinder rotates
slowly
Cutterhead fails to lift out
of work
Cutterheads do not follow
ground contours
Cutterheads fail to start
up when lowered into
work
TROUBLE SHOOTING
POSSIBLE CAUSE
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
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
Control levers in 'Neutral' position
Low oil level
Diverter valve jammed
Pressure relief valve jammed open or
wrongly set
Cutting cylinder jammed
Cutting cylinder tight on bottom blade
Cutterhead control valve in the 'off' position
caused by:
- Hydraulic pressure in the override lift
circuit
- Back lap control lever not locked in the
'normal operation' position
- Mechanical failure of the back lap control
valve or its operating mechanism
Hoses wrongly connected
REMEDY
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
Re adjust setting
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 the control levers to the 'Down / Cut'
position
Fill hydraulic oil reservoir to correct level
Free off and lubricate diverter valve as
necessary
Have relief valve cleaned and pressure
checked. Consult your dealer
Free off as necessary
Re adjust setting
Operate the override control lever to the
'Down / Cut' position
Lock the back lap control lever in the 'nor-
mal operation' position
Replace or repair as necessary
Check hydraulic circuit and reconnect as
necessary
1.76
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