Toro 74901 Operator's Manual page 58

10. If needed, loosen the whizlock nut on the side of the
yoke and the jam nut on top (Figure 89).
11. Fine tune the screw adjuster by turning it to get 7.6
mm (3 inches) height.
Note: To increase the height, turn the adjuster screw
clockwise; to decrease, turn it counterclockwise.
Note: 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.
Figure 89
1. Whizlock nut
2. Adjuster screw
12. To adjust the single point system, loosen the 2 bolts at
the bottom of the height-of-cut plate (Figure 90).
Figure 90
1. Bolts at the bottom of the height-of-cut plate
3. Jam nut
4. Yoke
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13. 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 91).
Note: Loosen or tighten the 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
14. Tighten the 2 bolts at the bottom of the height-of-cut
plate (Figure 90). T
Note: In most conditions, the back blade tip should
be adjusted 6.4 mm (1/4 inch) higher than the front.
15. Torque the 2 bolts to 37 to 45 N-m (27 to 33 ft-lb).
16. On both sides of the deck, measure from the level
surface to the back tip of the blade (postion B) as
shown in Figure 88.
Note: The measurement should read 8.3 cm (3-1/4
inches)
17. Fine tune the screw adjuster by turning it to get 8.3
mm (3-1/4 inches) height (Figure 89).
To increase the height, turn the adjustment nut
clockwise; to decrease, turn counterclockwise.
18. Measure until all 4 sides are the correct height.
19. Tighten all of the nuts on the deck-lift-arm assemblies.
20. Lower the discharge chute.
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Figure 91