Toro 20330 Service Manual - Page 143
Toro and Lawn-Boy Mowers with Blade
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UPC - 021038203300
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SELF-PROPEL BELT REPLACEMENT 21" Toro and Lawn-Boy Mowers with Blade Brake Clutch Part of the blade clutch must be disassembled to access the self propel belt. See the BBC section starting on page 6-1 for more information. 21" Toro Mowers with Blade Override System and Lawn-Boy Mower with Blade Clutch System Part of the BOS or BCS must be removed to replace the self propel belt. (See page 6-18 for more information.) The Lawn-Boy Insight has a black access cover just to the rear of the engine on top of the chassis. Remove it for easy access to the top of the transmission. 21" Lawn-Boy Insight Mowers The Zone Start models use a basic self propel system. See Transmission Remove and Replace, page 3-19, which also explains the belt replacement process. WPM Drive Systems Manual 8-3
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