Tools Required

SA9179NE Dial Indicator

1. Inspect the 1st clutch (715) and the coast clutch (712) pistons to include each piston's check valve. If the clutch piston's check valve is stuck, falls out of the piston or otherwise damaged, replace the clutch piston.



2. Verify that the coast clutch piston spring washer plate (711) is staked to the coast clutch piston (712). If not, replace the coast clutch piston assembly.



3. Check the clutch piston spring retainer cap (709) and retaining ring (708) for wear or damage.



4. Inspect all of the steel clutch plates (703) and (707), clutch fiber plates (702) and (706), and clutch backing plates (701) and (705) for the following:

•	If the clutch steel plates are worn, damaged or severely discolored, replace the plates as a complete set.

•	If the clutch fiber plates are worn, damaged, or discolored, replace the plates as a complete set.

•	If the 1st clutch (701) or the coast clutch backing plate (705) is worn, damaged, or severely discolored, inspect the clutch backing plate-to-top-disc clearance, then replace the clutch-backing-plate making sure to use the correct selective size backing plate.

5. Inspect the clutch plates (703) for phase difference.

1. Place the clutch waved-plate (703) on a surface plate, and set SA9179NE on the waved-plate.
2. Find the bottom (D) of a phase difference of the waved-plate, zero the SA9179NE and make a reference mark on the bottom of the waved-plate.
3. Rotate the clutch waved-plate of the 1st clutch about 60-degrees apart from the bottom while holding the waved-plate by the circumference. The SA9179NE should be at the top (E) of a phase difference. Do not rotate the waved-plate while holding the surface, always rotate the plate by holding the circumference.
4. Read the SA9179NE . The SA9179NE reads the phase difference (C) of the waved-plate between the bottom and top.

Specification
Standard: 0.05 mm (0.002 in) minimum

5. Rotate the waved-plate of the 1st clutch about 60-degrees. The SA9179NE should be at the bottom of a phase difference (F and H), and zero the SA9179NE .
6. Measure the phase difference at the other 2 tops (G and I) of the waved-plate by following steps 3 through 5.
7. If the 2 values of the 3 measurements are within the standard, the waved-plate is OK. If the 2 values of the 3 measurements are out of the standard, replace the waved-plate.