Rivera Primo Powerdrive 6 Transmission Shifter Cam & Fork Assembly - Manual (Page 2)

Inner Ramp
Retaining Ring
Clutch Cable
Coupling
Clutch Release Cover Assembly
Check Shifter Forks for Squareness
Shifter Cam Assembly
Fig.4
Fig.3
Fig.2
Cleaning & Inspection
1. Clean all parts with solvent prior to installing any
bearings. Blow dry with low pressure air.
2. Inspect roller bearings make sure that bearings ro-
tate freely without binding.
3. Inspect the shifter cam for cracks or wear. Inspect the
ends for grooves or pitting. Always install new roller
bearings whenever the shifter cam is replaced.
WARNING
:
Always wear safety glasses to shield
your eyes from airborne dirt and debris.
4. Inspect the shifter fork shaft and replace
if bent or damaged.
5. Using a small framer’s square, verify that the shift-
er fork shafts are square. If a fork does not rest flat
against the square, it is bent and must be replaced.
(See Fig. 3)
6. Inspect the shifter forks for wear. With a micrometer
or dial caliper, measure the width of the fork where
they contact the gear fork grooves. Replace any fork
that measures less than 0.170” (4.32 mm)
7. Inspect the neutral safety switch. Depress plunger
and observe the action. Plunger should pop back
without binding. The switch is not repairable and
must be replaced if inoperable.
8. Slide rubber boot off clutch cable adjuster. With a 1/2
inch wrench holding the cable adjuster, loosen jam
nut to get a significant amount of free
play at hand lever.
9. Remove six socket head screws to remove clutch
release cover from the transmission side door.
DO not re-use the gasket.
10. Remove retaining ring from inner ramp, then lift inner
ramp out of clutch release cover. Turn the inner ramp
over so that ball pockets are facing outboard. Remove
hook of ramp from button on coupling. Remove the
coupling from clutch cable end.
11. Unscrew the cable from the clutch release cover. Re-
move the clutch cable.
12. Remove the mainshaft fork shaft from the hole on the
right side of the transmission case by sliding outward,
then remove the 1st gear fork shaft by first removing
the threaded plug, then slide the shifter fork back
and forth until the shouldered head of the fork shaft
protrudes through the hole in the bearing housing.
Remove the shifter forks from the mainshaft and
countershaft grooves. (See Fig. 5 & 6)