16
13. FAULT FINDING CHART
FAULT
CAUSE
REMEDY
The chipper does not draw
Dull knives
Sharpen and refit
in material
Knife cutting
as per instructions
angle faulty
given in the manual
Knife fitted the
wrong way round
Uneven chip size
Knife gap ('B')
Adjust as per
too large
instructions given
Single lengths
in the manual
of wood turn side-
ways after passing
the feed rollers
The discharge spout gets
Too low rpm
Raise the rpm to
blocked
within the speed range of
540-1000 rpm
Power requirement excess-
Tractor hp too
ive on the tractor
small
Knife setting
Reduce the cutting
too large ('A')
knife setting or
remove the oppositeblades
Ingoing material produces
Feed rollers not
See the notes on
excessive vibrations
properly synchro-
synchronization of
nized
the feed rollers
13.1
DEVELOPMENT OF FAULTS
The normal wear taking place in the chipper proceeds in a safe fashion without producing any
risks of danger. In practice, the only wearing chipper parts are the cutting knives. Should a
situation occur where excessive bearing play is observed, the adjustment of such a condition
should be left to be remedied by a competent fitter.
