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2.
If the deflection is not 10 mm (3/8 inch),
loosen the idler pulley mounting bolt
114). 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.
Tensioning the Blade-Drive
Belts
Service Interval: After the first 10 hours
Every 50 hours
When properly tensioned, the inside measurement
of the extension spring (hook to hook) should be
approximately 8.3 to 9.5 cm (3-1/4 to 3-3/4 inches).
Once the correct spring tension is attained, adjust the
stop bolt (carriage bolt) until there is approximately 2
to 5 mm (0.065 to 0.185 inch) clearance between the
head of the bolt and the idler arm
Note:
Ensure that the belt is positioned on the spring
side of the belt guide
(Figure
Figure 115
1. Extension spring
2. Stop bolt
3. Flange nut
4. Belt guide
(Figure
(Figure
115).
115).
g037383
5. Measurement (hook to
hook)—approximately 8.3
to 9.5 cm (3-1/4 to 3-3/4
inches)
6. Eye bolt
7. Belt
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 include squealing when the belt is rotating,
blades slipping when cutting grass, frayed edges,
burn marks, and cracks. Replace the belt if any of
these conditions are evident.
1.
Lower the mower deck to the shop floor, remove
the belt covers from the top of the mower deck,
and set the covers aside.
2.
Loosen the eye bolt
3.
Loosen the flange nut securing the stop bolt to
the mounting tab and move the idler pulley away
from the belt
(Figure
Note:
Loosen the nut enough to allow the idler
arm to pass the stop bolt.
Note:
If you must remove the stop bolt from the
mounting tab, install it in the hole that aligns the
stop-bolt head with the idler arm.
4.
Remove the bolts securing the hydraulic motor
to the mower deck
1. Hydraulic motor
5.
Lift the motor off the mower deck and lay it on
top of the mower deck.
6.
Remove the old belt from around the spindle
pulleys and idler pulley.
7.
Route the new belt around the spindle pulleys
and idler-pulley assembly.
8.
Position the hydraulic motor on the mower deck
after routing the belt around the pulleys. Mount
the motor to the mower deck with the bolts
previously removed.
Note:
Ensure that the belt is positioned on the
spring side of the belt guide
78
(Figure
115).
115).
(Figure
116).
Figure 116
2. Mounting bolts
(Figure
115).
g011511
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