Servicing The Cutting Blades - Toro 74939 Operator's Manual

12. If the front deck links do not have enough adjustment
to achieve accurate cut height , the single point
adjustment can be utilized to gain more adjustment.
13. To adjust the single point system, loosen the 2 bolts at
the bottom of the height of cut plate. Refer to Figure
93.
Figure 93
1. Bolts at the bottom of the height-of-cut plate.
14. If the deck is too low, tighten the single point
adjustment bolt by rotating it clockwise. If the deck is
too high, loosen the single point adjustment bolt by
rotating it counterclockwise (Figure 94).
Note: Loosen or tighten single point adjustment bolt
enough to move the height-of-cut plate mounting bolts
at least 1/3 the length of the available travel in their
slots. This will regain some up and down adjustment
on each of the 4 deck links.
1. Single point adjustment bolt
15. Tighten the 2 bolts at the bottom of the height of cut
plate (Figure 93).
16. Torque to 27-33 ft-lb (37-45 N-m).
1
Note: In most conditions, the back blade tip should
be adjusted 6.4 mm (1/4 inch) higher than the front.
17. On both sides of the deck, measure from the level
g017029 surface to the back tip of the blade (Postion B). The
measurement should read 8.3 cm (3 1/4 inches) (Figure
90).
18. Fine-tune the adjustment nut on the front deck lift
assembly by turning it (Figure 91).
To increase the height, turn the adjustment nut
clockwise; to decrease, turn it counterclockwise.
19. Adjust and measure until all 4 sides are the correct
height.
20. Tighten all of the jam nuts on the deck lift arm
assemblies.
21. Lower the discharge chute.

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.
57
g017036
Figure 94