Exmark 4500-355 PTO Engagement Linkage Adjustment, PTO Safety Switch Adjustment, Maintenance

Maintenance

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

5.Blades may be adjusted for cutting height by using the four 1/4 inch (.64 cm) spacers found on the blade spindle bolts (factory setting is two above and two below). This allows a 1 inch (2.5 cm) range in 1/4 inch (.64 cm) increments of cutting height in any axle position. The same number of blade spacers must be used on all blades to achieve a level cut (two above and two below, one above and three below, etc.).

6.Raise front of deck and support with jack stands.

7.Hold blade bolt on bottom and loosen spindle nut on top.

8.Adjust number of spacers between bottom of spindle and blade as indicated in the Cutting Height Adjustment Table and notes in the Adjusting the Cutting Height section.

9.Install unused spacers between top of spindle and spindle nut.

10.Torque bolt to 75–80 ft-lb (102–109 N-m) (see Figure 11).

PTO Engagement Linkage Adjustment

Located between the PTO engagement bellcrank and PTO engagement assist arm beneath the front, left hand corner of the engine deck.

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

2.With PTO engaged (lever pulled up, adjust the linkage length to where the lower end of the bellcrank just clears the axle support gusset (see Figure 12). Make sure the assist arm is against the rear assist arm stop on the deck (see Figure 13). Push the lever down to the disengaged position. The assist arm should contact the front assist arm stop on the deck. If it does not contact, readjust so that the bellcrank is closer to the gusset.

Figure 11

1. Spring disc washer	2. Blade bolt torque to
(cone towards bolt head)	75–80 ft-lb (102–109
	N-m)

Figure 12

1.The bellcrank just clears the gusset with the PTO engaged

2.PTO Safety Switch (located beneath the engine deck)

3.Bellcrank

PTO Safety Switch

Adjustment

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

2.With PTO disengaged and assist arm against the front assist arm stop, adjust the blade safety switch mounting bracket (if needed) until the bellcrank depresses the plunger by 1/4 inch (.64 cm).

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