Exmark Diesel manual Pump Drive Belt Tension, Pump Drive Belt Replacement, Alternator Belt Tension

Maintenance

Adjustments

Note: Disengage PTO, shut off engine, wait for all moving parts to stop, engage parking brake, and remove key before servicing, cleaning, or making any adjustments to the unit.

Pump Drive Belt Tension

Self-tensioning - No adjustment necessary.

Pump Drive Belt

Replacement

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

2.Remove pump drive belt.

3.Route new belt onto sheaves as shown in the decal located on the right hand side of the left hood support (see Figure 12).

Figure 12

Alternator Belt Tension

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

2.Tilt seat forward and raise hood.

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

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

Park Brake Adjustment

Check to make sure brake is adjusted properly.

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

2.Tilt seat forward and raise hood.

3.Pull the brake lever up into the engaged position.

4.Locate the park brake spring assembly (see Figure 13). There should be a gap of 1/8 inch (3 mm) between the yoke and thin nyloc nut on the brake bolt. If necessary, rotate the thin nyloc nut to obtain the 1/8 inch gap.

Figure 13

1.	Park brake engaged	3.	Thin nyloc nut
2.	Yoke	4.	1/8 inch (3 mm) gap
			between nut and yoke.

5.Disengage the park brake. Measure the length of the park brake spring. The spring should measure 2 1/2 inches (6.4 cm) (see Figure 14).

Figure 14

1.	Yoke	3.	2 1/2 inches (6.4 cm)
2.	Park brake spring	4.	Thin nyloc nut

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