Operator`s manual

9” CHIPPER TWIN DISC PTO/CLUTCH
(Depending on engine selection)
69
CLUTCH ADJUSTMENT
The clutch in this machine does not
automatically adjust to compensate for wear
of the clutch facing(s) and therefore must be
manually adjusted. Maintaining the
correct engagement pressure is the
responsibility of the owner/operator. The
owner/operator must periodically adjust
the clutch to ensure correct clutch
operation. The clutch requires frequent
adjustments when parts are new to
prevent slipping, overheating, and failure.
MEASURING ENGAGEMENT FORCE
The clutch should be adjusted if the force
required for engaging the clutch drops by 10
to 15 percent of the specified force.
Destructive damage may have already
occurred if engagement force is allowed to
diminish to the point where the clutch fails
to carry the load (slippage) or facing(s) have
overheated.
CLUTCH ENGAGEMENT
N
OTE:
• New clutches or new facings usually
require several frequent adjustments
until the friction facing surfaces have
“worn in”. The clutch friction facing
plates will become glazed and
possibly permanently damaged if the
clutch is permitted to slip
excessively.
• If the facings have been slipped
excessively, and enough heat was
generated that the facings began to
smoke, the clutch material may have
been destroyed. Excessive heat
normally destroys the friction
material. Therefore, further clutch
adjustment will not remedy the
slippage problems. Replace “burned”
facin
g
p
lates.