Exmark Advantage Series 4500-466 Operator's Manual page 40

Maintenance
Figure 28
1. 3 1/4 inches (8.3 cm)
2. Back blade tip
3. Front blade tip
10. Loosen the whizlock nut on the side of the yoke
and the jam nut on top. Fine tune the screw
adjuster by turning it to get 3 inch (7.6 mm)
height (see Figure 29).
To increase the height, turn the adjuster screw
clockwise; to decrease, turn counterclockwise.
Figure 29
1. Whizlock nut
2. Adjuster screw
11. The back tips of the side blades should measure
3 1/4 inches (8.3 cm). Fine tune rear adjusters
as required.
4. 3 inches (7.6 cm)
5. Level surface
3. Jam nut
4. Yoke
12. Re-measure until all four sides are the correct
height. Tighten all the nuts on the deck lift arm
assemblies.
13. Lower discharge deflector.
14. If the four deck links do not have enough
adjustment to achieve accurate cut height with the
desired rake, the single point adjustment can be
utilized to gain more adjustment (see Figure 30).
1. Single point height adjustment bolt
2. Front height-of-cut plate mounting bolt
3. Rear height-of-cut plate mounting bolt
15. To adjust the single point system, first loosen the
front and rear height-of-cut plate mounting bolts.
16. 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.
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
four deck links.
17. Re-tighten front and rear height-of-cut plate
mounting bolts.
Important: Torque the front and rear
height-of-cut plate mounting bolts to 27-33
ft-lb (37-45 N-m).
18. Repeat steps 9 through 13.
40
Figure 30