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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 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 allowing the removal of the
extension spring
(Figure
3. Loosen the flange nut securing the stop bolt to the
mounting tab and move the idler pulley away from the
belt to release the belt tension
Note: Loosen the nut enough to allow the idler arm
to pass the stop bolt.
Note: If the stop bolt is ever removed from the
mounting tab, make sure that it is installed again 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
(Figure
Figure 69
4. Belt guide
5. Flange nut
6. Stop bolt
69).
(Figure
69).
70).
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
9. Connect the extension spring
bolt and tension the belt as follows:
•
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 inch).
•
When you attain the correct spring tension,
adjust the stop bolt (carriage bolt) until there is
approximately 2 to 5 mm (0.065 to 0.185 inches)
clearance between the head of the bolt and the
idler arm.
51
Figure 70
2. Mounting bolts
(Figure
69).
(Figure
69) to the eye
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