North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com
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When the clutch is properly adjusted, reposition the adjustment lock finger between the
splined teeth, making sure the lock finger is completely perpendicular to the main shaft,
and the spring steel lock spring is positioned in the “detent slot” of the finger so it is
securely locked.
Repeat the procedure in 3.4.1, 3.4.2, or 3.4.3, to recheck for proper engagement force.
Note: A new clutch installation usually requires several adjustments until the friction
facing surfaces have “worn in”. The clutch friction facing(s) will become glazed, and
possibly permanently damaged, if the clutch is permitted to slip excessively.
4.0 INSTALLATION INFORMATION
4.1 Preparation
Do not disengage the clutch before installing the PTO on the engine. Disengagement
allows the clutch plates to slip out of the correctly aligned positions established at
NACD.
4.1.1 If the facing plates have become misaligned, they may be realigned by using
the drive ring as a gauge. If the plates require alignment, follow the procedure
outlined below.
4.1.2 Support the PTO unit
with the output shaft hanging
straight down. Blocks or a
hoist can be used to hold the
PTO in position.
Lock Spring (407)
Machine Screw (405)
Lockwasher (408)
Detend Slot in Finger
Adjustment Lock Finger (401)
Clutch Body
Facing
Drive Ring
PTO Housing
Center the drive ring relative to
clutch body