Exmark 4500-355 Blade Brake Adjustment, Belt Guide Adjustment, Pump Drive Belt Tension Adjustment

Maintenance

Figure 15

48 inch Mower Deck

Blade Brake Adjustment

1.Stop engine and wait for all moving parts to stop. Engage parking brake. Remove key or spark plug wire(s).

2.Disengage PTO.

3.Make sure the blade brake pad rests against the sheave. Adjust the spring mounting bolts to properly align the pad on the sheave (see Figure 16).

Figure 16

Shown with Blades Disengaged

1. Blade Brake Rod	3. 1/8 inch to 3/16 inch
	(.32–.47 cm)

2.Spring Mounting Bolts

4.Check the distance between the spacer and the nut at the end of the blade brake rod. The distance should be between 1/8 inch (.32 cm) and 3/16 inch (.47 cm) (see Figure 16).

5.Engage the PTO and check to make sure the blade brake pad clears the sheave.

Belt Guide Adjustment

1.Stop engine and wait for all moving parts to stop. Engage parking brake. Remove key or spark plug wire(s).

2.Engage the PTO.

3.Check belt guide under the engine deck for proper adjustment (see Figure 17 and Figure 18). Adjust as necessary.

Figure 17

36 inch Belt Guide Location (Viewed from underneath the engine deck)

1.	1 1/4 inch (3.1 cm)	3. End of slot
2.	1/4 inch (.64 cm)
	clearance

Figure 18

48 inch Belt Guide Location (Viewed from underneath the engine deck)

1.	1 3/8 inch (3.5 cm)	3. End of slot
2.	1/4 inch (.64 cm)
	clearance

Pump Drive Belt Tension Adjustment

Self-tensioning - No adjustment necessary.

32