THREE SPEED TRANSMISSION
3.
Removal of the input shaft and pulley assembly can
5. Remove the cotter pin from the top of the shift fork
and remove the shift lever.
be difficult because the input pinion has a tendency
to turn as the pulley nut is loosened. This situation
can be addressed by using an impact wrench or by
removing the 20 (B) and 25 (A) tooth gears (Fig.
6. Carefully pull the output shaft from the transmission
case, clean, and inspect all components for wear
or damage. Check the input shaft ball bearing for
roughness or excessive drag and replace any parts
necessary. If ball bearing replacement is required,
press the ball bearing out using an arbor press.
122)
from the intermediate shaft and then putting
the intermediate shaft assembly back onto the
transmission. The hexagonal intermediate shaft
can then be held with a 7/16” end wrench while the
pulley nut is loosened.
7.
If service of any of the output shaft gears, or the
gear selection system, is required, remove the left
pivot arm as described under “Rear Height-of-Cut
and Wheel Pinion Clutch – Disassembly” on page
Note: A cut-away transmission cover can be
fabricated to hold the intermediate shaft in
place to facilitate pulley nut removal.
5-4
and 5-5.
A
B
Note: It is possible to replace the shift keys and
spring clip without removing the pivot arm
if the roll pin securing the gear sleeve to the
output shaft is first driven out. However, it
is not recommended since inspection of the
inside of the output gears is not possible.
8.
Pull the output shaft bushing, the spacer, the shift
collar, the shift keys and spring clip, and the shift key
sleeve from the output shaft.
9.
Remove the three output shaft gears form the output
shaft.
10.
Drive out the roll pin securing the gear sleeve to the
output shaft. Remove the gear sleeve and remaining
output shaft bushing. Inspect all parts for wear and
damage and replace if necessary.
Fig 122
3428-0058
A. 25-tooth gear
B. 20-tooth gear
4.
Remove the intermediate shaft from the transmission
Transmission - Assembly
and clean. Inspect all gears for wear, cracks, and/or
broken teeth. Inspect the bushings for excessive
wear. Replace any parts necessary. Be careful not to
lose the two spacers that fit between the bevel gear
and the bushing.
The transmission uses 6 oz. (177cc) No. 2 lithium-based
grease as a lubricant. When assembling, be sure to coat
all moving components with grease to ensure proper
lubrication.
WPM Drive Systems Manual
4-7
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