18” CHIPPER TWIN DISC, INC.
PTO/CLUTCH
65
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
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
lates.
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