12” CHIPPER TWIN DISC PTO/CLUTCH
(Depending on engine selection)
69
The preferred method of checking the force
required to engage the clutch is using a
torque wrench to check the foot-pounds
required to engage the clutch. The torque
wrench should be used at the cross shaft to
measure engagement force. For the clutch
used in this machine, the reading should be
between 108-115 ft-lbs. The clutch should
ENGAGE within this torque reading range.
An adapter, Twin Disc, Inc. part number
02036484, may be obtained to provide a
1 1/2" hex nut at the end of the cross shaft.
The adapter may be used in place of the
standard handle for the purpose of checking
clutch adjustment with a torque wrench or it
may be installed on the end of the cross
shaft. (Most PTOs have serrations on both
ends of the cross shaft.) Another method for
checking engagement force is the spring
scale method, which is covered in the
PTO/Clutch manual.
CLUTCH ADJUSTMENT PROCEDURE
If the clutch requires adjustment, remove the
PTO nameplate and disengage the clutch.
Push the adjustment lock pin in and rotate
the adjustment ring. Rotate the adjusting
ring clockwise to tighten the clutch.
(Rotating the adjusting ring counter-
clockwise will further loosen the clutch.)
Check with the torque wrench, as described
earlier, and continue to adjust until the
handle engagement force is within the range
of 108-115 ft-lbs. When clutch is properly
adjusted, replace the PTO nameplate.
CHECK ENGAGEMENT FORCE AT EITHER
END OF THE CROSS-SHAFT
REMOVE NAMEPLATE
ADJUSTING RING NOTCH
ADJUSTMENT LOCK
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