Toro 20330 Service Manual - Page 71

THREE SPEED TRANSMISSION 3. Removal of the input shaft and pulley assembly can be difficult because the input pinion has a tendency to turn as the pulley nut is loosened. This situation can be addressed by using an impact wrench or by removing the 20 (B) and 25 (A) tooth gears (Fig. 122) from the intermediate shaft and then putting the intermediate shaft assembly back onto the transmission. The hexagonal intermediate shaft can then be held with a 7/16" end wrench while the pulley nut is loosened. Note: A cut-away transmission cover can be fabricated to hold the intermediate shaft in place to facilitate pulley nut removal. A B A. 25-tooth gear Fig 122 3428-0058 B. 20-tooth gear 5. Remove the cotter pin from the top of the shift fork and remove the shift lever. 6. Carefully pull the output shaft from the transmission case, clean, and inspect all components for wear or damage. Check the input shaft ball bearing for roughness or excessive drag and replace any parts necessary. If ball bearing replacement is required, press the ball bearing out using an arbor press. 7. If service of any of the output shaft gears, or the gear selection system, is required, remove the left pivot arm as described under "Rear Height-of-Cut and Wheel Pinion Clutch - Disassembly" on page 5-4 and 5-5. Note: It is possible to replace the shift keys and spring clip without removing the pivot arm if the roll pin securing the gear sleeve to the output shaft is first driven out. However, it is not recommended since inspection of the inside of the output gears is not possible. 8. Pull the output shaft bushing, the spacer, the shift collar, the shift keys and spring clip, and the shift key sleeve from the output shaft. 9. Remove the three output shaft gears form the output shaft. 10. Drive out the roll pin securing the gear sleeve to the output shaft. Remove the gear sleeve and remaining output shaft bushing. Inspect all parts for wear and damage and replace if necessary. 4. Remove the intermediate shaft from the transmission and clean. Inspect all gears for wear, cracks, and/or broken teeth. Inspect the bushings for excessive wear. Replace any parts necessary. Be careful not to lose the two spacers that fit between the bevel gear and the bushing. Transmission - Assembly The transmission uses 6 oz. (177cc) No. 2 lithium-based grease as a lubricant. When assembling, be sure to coat all moving components with grease to ensure proper lubrication. WPM Drive Systems Manual 4-7