North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com
4.6 Check Clutch Engagement Pressure
The clutch was properly adjusted at NACD. However, due to variables created by first-
time engagements, the clutch engagement pressure should be rechecked to insure
proper clutch engagement pressure at the time of installation. See sections 3.4 and 3.5.
Note: New clutches or new facings usually require several, frequent adjustments
until the friction facing surfaces have "worn in”. The clutch friction facings) will
become glazed, and possibly permanently damaged if the clutch is permitted to slip
excessively.
4.6.1 Adjust the clutch if necessary.
4.7 Attaching And Shimming The PTO Support Plate
The following shimming procedures for shimming the support plate and outboard
bearing must be carefully followed. It is imperative that the three (3) support bearings
(pilot bearing, PTO main bearing(s) and outboard bearing) be in close alignment. The
outboard bearing will help to support the side loads imposed on the PTO shaft by the
belts. If the three bearings are not installed so that the center of the PTO shaft is in a
straight line, reduced bearing life will occur. It is therefore important that the internal
PTO bearings be properly installed and adjusted, and that neither support plate nor the
outboard bearing impose a load which would tend to bow the centerline of the PTO
shaft.
Note: NACD does not supply support plates or outboard bearings. The support plate
configuration guidelines shown on page 14 may be of assistance in obtaining a suitable
support plate for your application.
4.7.1 The power take off must be bolted to the engine.
4.7.2 Attach the power take off to the engine, without a pulley or any other component
attached to the PTO shaft.
4.7.3 Mount (2) dial indicators 90°
apart to a solid base or solid part of the
engine (only one indicator is illustrated).
4.7.4 Place the points of the dial
indicators against the top and side of
the bearing housing, as far to the rear
of the PTO as possible. Set the dial
indicators to read zero.
16
Support Plate