Exmark 312 Lawn Mower User Manual


 
Maintenance
7. Release the transport lock and allow the deck to
lower to the cutting height.
8. Raise the discharge deector.
9. Measure from the level surface to the front tip of
the center blade. The measurement should read
3 inches (7.6 cm).
Note: In most conditions, the back tips on the
side blades should be adjusted 1/4 inch (6.4 mm)
higher than the front.
Figure 27
1. 3 1/4 inches (8.3 cm) 4. 3 inches (7.6 cm)
2. Back blade tip
5. Level surface
3. Front blade tip
10. Fine tune the front deck lift assembly by turning
the adjuster screw until it reaches the 3 inch (7.6
cm) height (see
Figure 28). To increase the height,
turn the adjuster screw clockwise; to decrease,
turn counterclockwise.
Figure 28
1. Adjuster screw 2. Jam nut
11. The back tips of the side blades should measure
3 1/4 inches (8.3 cm). Fine tune rear adjusters
as required. (The single point adjustment can be
utilized to gain more adjustment.)
12. Re-measure until all four sides are the correct
height. Tighten all the nuts on the deck lift arm
assemblies.
13. Lower discharge deector.
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 29).
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