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·
Remove pulley gear.
·
Rinse pulley in fresh water. Work the ball inside the shaft-hole in and out.
·
Clean, dry and lubricate shaft. Work lubrication into the ball inside the shaft-hole.
·
Replace pulley, retaining clip, and pulley cap.
·
Replace the two shear screws. Do not over-tighten screws, they can strip or the pulley may distort. Rotate
the pulley on the shaft and observe the ends of the shear screw pins.
Shear Pin Clearance Adjustment and Clutch Maintenance
There should be an even gap (1/16" approx.) between the end of the shear pins and stainless steel shaft-plate. If
one of the pins is too close to shaft-plate, it may tend to catch in the plate holes when the wheel is turned. If the
pulley does not turn freely, the pins are not even, or the pins are too close to the shaft-plate, back off one or
both of the screws slightly. There is a slotted set-screw in the gear teeth to adjust the spring and ball détente.
The drive-plate
(4)
does not need to be removed as part of normal maintenance. It may need to be removed if a
broken shear screw
(7)
head becomes trapped behind it. There is a hole in the shaft. To remove the drive plate,
insert a narrow screw-driver and unscrew the stainless shaft from the motor shaft (it has normal threads—
rotate shaft counter-clockwise to loosen). Gently pry the circular plate off the knurled motor shaft; gently pry
all around the plate, force is not needed. Do not remove or lose the black-rubber watertight seal (O-ring)
found under the plate. Clean the drive plate, shaft, and hub of the clutch gear. Oil or grease the parts before re-
assembly. Be sure to work some oil into the detent ball that protrudes into the hub of the clutch gear. Replace
belt and adjust the belt tension.
Item #
Part #
Part Name
1
Motor Box
2
Motor Shaft
3
37-0004
Motor Shaft O-Ring,
size 110
4
53-0009
Drive Plate
5
53-0012
Drive Shaft
6
98-0039
Ball Spring Detent
7
53-0007
Drive Pulley Gear
8
42-0013
Retaining Ring 5/8"
9
98-0027
Pulley Cap
10
98-0030
Shear Screw #10-32
