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Belt Maintenance
Checking the Alternator Belt
Service Interval: Every 200 hours
After the first 10 hours
Check tension of alternator belt (Figure 56) after every
200 operating hours.
1. Apply 10 lb of force to the alternator belt, midway
between the pulleys.
2. If the deflection is not 3/8 in. (10 mm), loosen the
alternator mounting bolts.
Figure 56
1. Mounting bolt
3. Increase or decrease the alternator belt tension and
tighten the bolts.
4. Check the deflection of the belt again to ensure that
the tension is correct.
Replacing the Blade Drive
Belts
Service Interval: Every 50 hours
The blade drive belts, tensioned by the spring loaded
idler pulleys, are very durable. However, after many
hours of use, the belts will show signs of wear. Signs of
a worn belt are: squealing when belt is rotating, blades
slipping when cutting grass, frayed edges, burn marks
and cracks. Replace the belts if any of these conditions
are evident.
1. Lower the cutting unit to the 1 inch height of cut
setting, move the throttle lever to the Slow position,
2. Alternator
stop the engine, set the parking brake, and remove
the ignition key.
2. Remove the belt covers from the top of the cutting
unit and set the covers aside.
3. Using a breaker bar or similar tool, move the idler
pulley for the top belt (Figure 57) away from the top
drive belt to release the belt tension and allow the
belt to be slipped off the pulleys.
1. Top belt
2. Top idler pulley
4. Using a breaker bar or similar tool, move the idler
pulley for the bottom belt (Figure 57) away from
the bottom drive belt to release the belt tension and
allow the belt to be slipped off the pulleys.
5. Route a new belt around the gearbox pulley, bottom
spindle pulleys, and idler pulley assembly as shown
in Figure 57.
6. Route a new belt around the top spindle pulleys and
idler pulley assembly as shown in Figure 57.
7. Install the belt covers.
49
Figure 57
3. Bottom belt
4. Bottom idler pulley
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