Exmark 4500-507 manual Caster Pivot Bearings Pre-Load Adjustment, Clutch Shim, Removing the Shim

Maintenance

brake has worn to the point where the clutch no longer engages consistently, the shim can be removed to extend the clutch life.

Figure 36

RH Motion Control Shown

1. Screw 3. Motion control lever

2.Cover plate

Caster Pivot Bearings Pre-Load Adjustment

Remove dust cap from caster and tighten nyloc nut until washers are flat and back off 1/4 of a turn to properly set the pre-load on the bearings. If disassembled, make sure the spring disc washers are reinstalled as shown in Figure 37.

Figure 37

1.Spring disc washers

Clutch Shim

Some later model year units have been built with clutches that contain a brake shim. When the clutch

Figure 38

1.	Armature	5.	Brake spacer
2.	Field shell	6.	Re-gap shim
3.	Rotor	7.	Brake pole
4.	Brake mounting bolt

Removing the Shim:

1.Stop engine, wait for all moving parts to stop, and remove key. Engage parking brake. Allow the machine to cool completely before starting these instructions.

2.Using a pneumatic line, blow out any debris from under the brake pole and around the brake spacers.

Figure 39

3.Check the condition of the wire harness leads, connectors, and terminals. Clean or repair as necessary.

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