Check The Blade Drive System; Change Blade Brake Clutch (Bbc) Belt - Exmark 30" Operator's Manual

Check the Blade Drive
System
Service Interval: After the first 5 hours
Every 50 hours
1. Stop the engine and wait for all moving parts to
stop.
2. Disconnect the wire from the spark plug.
3. Remove and retain the belt access panel by
rotating the screws a quarter-turn.
Figure 23
1. Belt access panel
4. Brush out all the debris around the belt area.
5. Use a feeler gauge, a piece of paper, or a note
card against the frame and slide it down behind
the belt tension spring.
Note: The gap between the gauge and the spring
should be .005-.030 inch (.13-.76 mm), tighten the
adjusting bolt and nut until the paper barely slides
freely in and out of the gap.
1. Belt tension spring
2. Adjusting bolt
3. Gap
Important: Do Not overtighten the adjusting
bolt. This could damage the blade drive belt.
6. Reinstall the belt access panel and rotate the
screws a quarter-turn to lock into place.
7. Connect the wire to the spark plug.
Change Blade Brake Clutch
(BBC) Belt
Service Interval: Every 250 hours
1. Stop the engine and wait for all moving parts to
stop.
2. Disconnect the wire from the spark plug.
3. Remove and retain the front belt cover and its
four bolts. Remove any debris under the cover.
4. Remove and retain the BBC bracket and its
mounting hardware.
5. Loosen the cable clamp screw on the BBC cable
and remove the old belt (refer to Figure 29).
6. Install the new belt.
7. Reinstall the BBC bracket.
8. Adjust the BBC cable as described in Adjusting
the Blade Brake Cable in the Adjustments
section.
9. Reinstall the front belt cover.
25
Maintenance
Figure 24
4. Adjusting nut
5. Frame