Exmark 000 & higher, 312 manual Pump Drive Belt Tension, Deck Belt Tension

Maintenance

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 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 29).

Figure 29

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.

Pump Drive Belt Tension

Self-tensioning - No adjustment necessary.

Deck Belt Tension

Self-tensioning - No adjustment necessary.

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