SECTION VIII
Figure 8-4. Clutch Disassembly
Figure 8-5. Checking Pressure Plate Thickness
B. The pressure plate is warped in excess of 0.015 inch
and clutch ring, using a new pressure plate. A tight fit may
hamper smooth engagement and release, while excessive
(.381 mm).
clearance may cause noise or allow the pressure plate to
C. The driving lugs are worn excessively.
shift off center. creating an unbalanced condition.
D. The eyebolt pin holes are elongated.
8. Check the pressure springs for proper compression
weight. The proper compression weight is 150 pounds
(66.04 kg) at 1-27/32 inches (36.116 mm).
NOTE
Using a scored, warped, or heat checked pressure
plate will cause the facings to disintegrate rapidly,
Underweight springs will reduce clutch capacity and
and will seriously affect clutch life
may cause clutch slippage To insure the best clutch
performance, install new pressure springs.
4. It is not recommended that more 1/32 inch (.795 mm)
9. Replace the needle bearings in each eyebolt assembly.
be removed from the friction face of the pressure plate by
When installing new needle bearings, use a suitable tool and
regrinding. The original thickness of the pressure plate is
press on the end of the bearing having numbers stamped on
1.531 inches (38.887 mm). Measure the pressure plate
it.
thickness as shown in Figure 8-5.
10. Replace the release levers if the hole for the eyebolt or
5. Do not reuse the intermediate plate if there is more than
pressure plate pins are worn, or if the levers are worn se-
0.012 inch (.254 mm) clearance between the driving lugs
verely by the release bearing.
and the mating slots in the flywheel. It is recommended
that grinding of the intermediate plate be kept to a
ASSEMBLY. To assemble the engine clutch, proceed as
minimum, with not more than 0.015 inch (.381 mm) king
follows:
removed from either side. The original thickness of the
1. Place the pressure plate on an arbor press with the
intermediate plate is 0.676 inch (17.17 mm).
friction face down. Install the adjusting nuts on the eye-
6. inspect the clutch ring for distortion or cracks. The
bolts, and assemble the eyebolts to the release levers, using
bolting flange must be flat to within 0.015 inch (.381 mm)
new pins. See Figure 8-6.
when checked on a surface plate.
2. Install the release levers. pressure plate pins, and
7. Inspect the slots in the clutch ring which engage the
retaining rings on the pressure plate. Place insulating
driving lugs of the pressure plate. If these driving surfaces
washers over the spring bosses on the pressure plate, and set
are worn to the extent that, with a new pressure plate
the springs in place.
installed, a clearance in excess of 0.012 inch (.254 mm) is
3. Place the clutch ring over the pressure springs, making
present, replace the clutch ring. Also, there should be not
less than 0.004 inch (.1016 mm) nor more than 0.014 inch
certain that each spring is positioned properly in the ring. If
the original pressure plate and clutch ring are being used,
(.355 mm) movement possible between the pressure plate
8-4
