Toro 20351 Quality Guide - Page 21

Checking and Adjusting the Blade Level Blade Length/Nominal Front-to-Rear Pitch Measurement Difference Blade Length: U.S. Models 18 inches 21 inches 22 inches Blade Length: Metric Models 40cm 43cm 46cm 48cm 51cm 53cm Front-to-Rear Pitch Measurement Difference 0.314 inch 0.366 inch 0.383 inch Front-to-Rear Pitch Measurement Difference 6.89mm 7.45mm 7.62mm 8.35mm 8.99mm 9.29mm Adjusting Height of Cut While measurement procedures are the same for all walk behind mowers, the type of suspension or height of cut adjusters on a given mower determine the procedures to use in adjusting the height of cut. Models with Height of Cut Lever on Each Wheel Mechanism Descriptions Toro and Lawn-Boy have similar systems for individual wheel adjusters. A spring arm with a pin to engage a notch is used to determine the height of cut on these models. On cast deck models this notch is molded in the deck (Figure 19). On steel decks a steel height of cut plate serves this purpose (Figure 20). Figure 20 2768-0011.TIF Slipping Height of Cut Adjuster If the spring arm will not maintain height of cut, it has lost spring tension and must be replaced. When the height of cut spring arm is weak and has slipped a number of times, it can wear away the notches. On steel decks the height of cut plate should be replaced if this happens. On cast decks, this wear is in the deck housing itself. One alternative is to replace the deck housing. However, there are two wear plate kits, which fit many 21-inch Toro models: Kit PN 105-1290 fits Toro 21-inch Super Recyclers manufactured 1995 and newer (Figure 21). Kit PN 49-4080 fits the older 21-inch Recyclers and Rear Baggers (Figure 22). Note: These kits do not fit any Vacu-Power, Commercial (Pro Line), or Landscaper models. Figure 19 0185-12.TIF Service Dealer's Guide to Great Quality of Cut Figure 21 mvc-460.tif 4 - 5