Exmark Frontrunner 4500-497 - Manual (Page 35)

Maintenance
Figure 16
Right-Hand Side of Unit Shown
1. Re-install spring in outer
holes to reduce spring
tension. 3. Remove e-ring and
washer.
2. Weight transfer spring.
7. Re-install the left fender.
8. For additional weight transfer adjustment, repeat
steps 4 through 7 on the right side of the unit.
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 17.
Figure 17
1. Spring disc washers
Clutch Shim
Some later model year units have been built with
clutches that contain a brake shim. When the clutch
brake has worn to the point where the clutch no
longer engages consistently, the shim can be removed
to extend the clutch life.
Figure 18
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 19
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