Toro 20330 Service Manual - Page 29
Constant Mesh
UPC - 021038203300
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WORM DRIVE TRANSMISSION 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. 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 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 The constant mesh type transmission is used in a 48cm rear wheel drive application. WPM Drive Systems Manual Fig 022 fig 18-A 1-11