Servicing The Cutting Blades - Toro 74410 Operator's Manual

Adjusting the Front-to-Rear Mower
Pitch
1. Position the right blade front-to-rear (Figure 62).
2. Measure the right blade at the A location, from a
level surface to the cutting edge of the blade tip
(Figure 62).
Figure 62
1. Measure here from blade
to hard surface
3. Record this measurement.
4. Measure the right blade at the B location, from a
level surface to the cutting edge of the blade tip
(Figure 62).
5. Record this measurement.
6. The mower blade should be a 1/4 to 3/8 inch
(6 to 10 mm) lower at position A than at position
B (Figure 62). If it is not correct, proceed to the
following steps.
Note: Both of the front swivels need to be adjusted
the same amount to maintain equal chain tension.
7. Loosen the front swivel jam nuts, at the front of
the right and left swivels, approximately a 1/2 inch
(13 mm) (Figure 61).
8. Adjust the lift nuts on both the left and the right
side of the machine to achieve 1/4 to 3/8 inch
(6 to 10 mm) lower in front at A than in the rear at
B (Figure 61).
9. Tighten both swivel jam nuts against the front swivel
to lock the height.
10. Check to make sure there is equal tension on the
chains and adjust again if needed.
Adjusting the Compression Spring
1. Raise the mower lift lever to the transport position.
2. Measure at A and B
2. Check the distance between the two large washers,
it needs to be 11-1/8 inches (28.2 cm) for 52 inch
mower decks and 10-1/2 inches (26.7 cm) for 60
inch mower decks (Figure 63).
3. Adjust this distance, by loosening the spring jam
nut and turning the nut in front of each spring
(Figure 63).
Note: Turning the nut clockwise will shorten the
spring; counter-clockwise will lengthen the spring.
4. Lock the nut into position by tightening the spring
jam nut (Figure 63).
1. 10-1/2 inch (26.7 cm)
2. Front nut
3. Spring jam nut
4. Front swivel

Servicing the Cutting Blades

Maintain sharp blades throughout the cutting season
because sharp blades cut cleanly without tearing or
shredding the grass blades. Tearing and shredding turns
grass brown at the edges, which slows growth and
increases the chance of disease.
Check the cutter blades daily for sharpness, and for any
wear or damage. File down any nicks and sharpen the
blades as necessary. If a blade is damaged or worn,
replace it immediately with a genuine Toro replacement
blade. For convenient sharpening and replacement, you
may want to keep extra blades on hand.
47
Figure 63
5. Swivel jam nut
6. Lift nut
7. Front support arm
8. Large washer