WORM DRIVE TRANSMISSION
CONSTANT MESH
1. Jam nut
13. Oil Seal
2.
Lock washer
14. Output shaft
15. Traction bracket
16. Thread forming screw
17. Gearbox case
18. Thrust washer
19. Roll pin
3.
Half pulley
Description
4.
V Belt
5.
Pulley spacer
Gearbox cover
Shaft & worm
Ball bearing
Gearbox gasket
Check plug
This transmission is very similar to the “INTERNALLY
CLUTCHED” on page 1 – 1. However, the helical gear
is different as there is no internal clutching (Fig. 022).
Engagement and disengagement is accomplished by
pivoting the transmission to tighten or loosen the belt.
6.
7.
8.
20. Helical gear
21. Thrust washer
22. Bushing
9.
10.
11.
12.
Gasket check plug
Bushing
23. Roll pin
Internal repair procedures are the same, as is the
lubrication requirement, 90 wt. gear oil rated GL-5 or
higher.
The constant mesh type transmission is used in a 48cm
rear wheel drive application.
Fig 022
fig 18-A
WPM Drive Systems Manual
1-11
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