Exmark 4500-872 manual Pump Drive Belt Tension, Deck Belt Tension, Adjusting the Parking Brake

Maintenance

Figure 27

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 28).

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.

Adjusting the Parking Brake

Service Interval: After the first 100 hours

Every 500 hours thereafter

Figure 28

1.Single point height adjustment bolt

2.Front height-of-cut plate mounting bolt

3.Rear height-of-cut plate mounting bolt

Check to make sure brake is adjusted properly. This procedure must be followed after the first 100 hours or when a brake component has been removed or replaced.

1.Drive the machine onto a level surface.

2.Disengage the blade control switch (PTO), move the motion control levers to the neutral locked position and set the parking brake.

3.Stop the engine, wait for all moving parts to stop, and remove the key.

4.Raise the back of the machine up and support the machine with jack stands.

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