Service Manual
2-7
WPM Drive Systems Manual
WORMDRIVETRANSMISSION
15. Remove the roll pin and pull shifter rod out of the
cover. Clean the cover.
14. Remove the screw from the shift arm and remove
the shift arm, dust cover, and wear plate (Fig. 015). If
the ball bearing is to be replaced, press it out at this
time.
9. Clean the old gasket material from the mating
surfaces of the case and cover.
10. A hook or small screwdriver can be used to pry the
seals out of the case.
11. An arbor press or large vise will be needed when
removing and replacing the bushings.
12. Clean the oil residue and any metal shavings from
the case.
13. Worm and helical gears are sold as a set. Even after
a short run time, they will develop a wear pattern.
Replacing only one gear will result in rapid failure
(Fig. 014).
Fig014 3428-0157
A. Worm Shaft B. Helical Gear
B
A
Fig015 3428-0165
A. Roll Pin E. Shift Arm
B. Latch Plate F. Screw
C. Dust Filter G. Shift Rod
D. Dust Cover
A
B
D
E
F
C
G