Constant Mesh Description - Toro 20330 - Low Wheel Walk Power Mower Service Manual

CONSTANT MESH
Description
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.
Internal repair procedures are the same, as is the
lubrication requirement, 90 wt. gear oil rated GL-5 or
higher.
WPM Drive Systems Manual
WORM DRIVE TRANSMISSION
1. Jam nut
2. Lock washer
3. Half pulley
4. V Belt
5. Pulley spacer
6. Gearbox cover
7. Shaft & worm
8. Ball bearing
9. Gearbox gasket
10. Check plug
11. Gasket check plug
12. Bushing
The constant mesh type transmission is used in a 48cm
rear wheel drive application.
13. Oil Seal
14. Output shaft
15. Traction bracket
16. Thread forming screw
17. Gearbox case
18. Thrust washer
19. Roll pin
20. Helical gear
21. Thrust washer
22. Bushing
23. Roll pin
Fig 022 fi g 18-A
1-11