Service Manual

Service Dealer’s Guide to Great Quality of Cut 4 - 5
Checking and Adjusting the Blade Level
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 19
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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 21
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Blade Length/Nominal Front-to-Rear Pitch
Measurement Difference
Blade Length:
U.S. Models
Front-to-Rear Pitch
Measurement
Difference
18 inches 0.314 inch
21 inches 0.366 inch
22 inches 0.383 inch
Blade Length:
Metric Models
Front-to-Rear Pitch
Measurement
Difference
40cm 6.89mm
43cm 7.45mm
46cm 7.62mm
48cm 8.35mm
51cm 8.99mm
53cm 9.29mm