Exmark 4500-501 Rev A manual Deck Belt Tension, Alternator Belt Tension, Belt Guide Adjustment

Maintenance

be 1/8 inch (3.2 mm) away from the belt, with bolt-end of guide near end of slot (Figure 18).

4. If adjustment is necessary, loosen the bolt securing the belt guide and make proper adjustment. Tighten hardware.

		Figure 17
1.	Spring idler pulley	3. Right side idler pulley	Figure 18
2.	Front of unit	(adjustable)
		1. End of slot	2. Belt guide

Deck Belt Tension

Self-tensioning - No adjustment necessary.

Alternator Belt Tension

Stop engine, wait for all moving parts to stop and remove key. Engage parking brake.

Tilt seat and remove air deflector panel

To tighten alternator belt, loosen both upper and lower alternator mounting bolts. Rotate alternator out, away from engine and retighten hardware to secure in place.

When properly tensioned, the alternator belt will deflect 1/4 to 3/8 inch (7-9 mm) while applying 22 pounds of force to the belt midway between fan and alternator.

Belt Guide Adjustment

1.Stop engine, wait for all moving parts to stop, and remove key. Engage parking brake.

2.Remove the belt shield on the right side of mower deck.

3.Note belt guide bolted to deck near the shield support stud and right-hand pulley. Guide should

Brake Link Adjustment

Check to make sure brake is adjusted properly.

1.Disengage brake lever (lever down).

2.Measure the length of the spring. Measurement should be 2 13/16 inches (7.1 cm) between washers. (Figure 19).

3.If adjustment is necessary, adjust the nyloc nut at the bottom of the spring to achieve 2 13/16 inches (7.1 cm).

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