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Belt Maintenance
Servicing the Alternator
Belt
Service Interval: After the first 10 hours
Every 100 hours
Check the condition and tension of the belt
96) after every 100 operating hours.
1.
Proper tension will allow 10 mm (3/8 inch)
deflection when a force of 44 N (10 lb) is applied
on the belt midway between the pulleys.
2.
If the deflection is not 10 mm (3/8 inch), loosen
the alternator mounting bolts
Increase or decrease the alternator belt tension
and tighten the bolts. Check the deflection of the
belt again to ensure that the tension is correct.
Figure 96
1. Alternator
2. Mounting bolt
Servicing the Compressor
Belt
Service Interval: After the first 10 hours
Every 100 hours
Cab model only
Check the condition and tension of the belt
96) after every 100 operating hours.
1.
Proper tension will allow 10 mm (3/8 inch)
deflection when a force of 44 N (10 lb) is applied
on the belt midway between the pulleys.
2.
If the deflection is not 10 mm (3/8 inch),
loosen the idler pulley mounting bolt
(Figure
(Figure
96).
g020460
3. Compressor
4. Idler pulley
(Figure
(Figure
96). Increase or decrease the compressor
belt tension and tighten the bolt. Check the
deflection of the belt again to ensure that the
tension is correct.
Re-tensioning the Blade
Drive Belts
Service Interval: After the first 10 hours
Every 50 hours
Check the condition and tension of the cutting unit
drive belts initially after 10 hours of operation and
every 50 operating hours thereafter.
When properly tensioned, the extension spring (hook
to hook) measurement should be approximately 8.9
cm ± .63 cm (3.50 ±.25 inch) (inside). Once the
correct spring tension is attained, adjust the stop
bolt (carriage bolt) until there is approximately .32
cm ± .152/.000 cm (.125 +.060/-.000 inch) clearance
between the head of the bolt and the idler arm
97).
Note:
Make sure the belt is positioned on the spring
side of the belt guide
1. Belt
2. Eye bolt
3. Extension spring
Replacing the Blade Drive
Belt
Service Interval: Every 800 hours
The blade drive belt, tensioned by the spring loaded
idler pulley, is very durable. However, after many
hours of use, the belt will show signs of wear. Signs
of a worn belt are: squealing when belt is rotating,
blades slipping when cutting grass, frayed edges,
63
(Figure
97).
Figure 97
4. Belt guide
5. Flange nut
6. Stop bolt
(Figure
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