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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
(Figure
Figure 97
1. Belt
2. Eye bolt
3. Extension spring
(Figure
97).
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4. Belt guide
5. Flange nut
6. Stop bolt
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,
burn marks and cracks. Replace the belt if any of
these conditions are evident.
1.
Lower the cutting unit to the shop floor. Remove
the belt covers from the top of the cutting unit
and set the covers aside.
2.
Loosen the eye bolt allowing the removal of the
extension spring
3.
Loosen the flange nut securing the stop bolt
to the mounting tab. Back off the nut enough
to allow the idler arm to pass by the stop bolt
(Figure
97). Move the idler pulley away from the
belt to release belt tension.
Note:
If the stop bolt is ever removed from the
mounting tab, make sure it is reinstalled in the
hole that aligns the stop bolt head with the idler
arm.
4.
Remove the bolts securing the hydraulic motor
to the cutting unit
of the cutting unit and lay it on top of the cutting
unit.
1. Hydraulic motor
5.
Remove the old belt from around the spindle
pulleys and idler pulley.
6.
Route the new belt around the spindle pulleys
and idler pulley assembly.
7.
Position the hydraulic motor on the cutting
unit after routing the belt around the pulleys.
Mount the motor to the cutting unit with the bolts
previously removed.
63
(Figure
97).
(Figure
98). Lift the motor off
Figure 98
2. Mounting bolts
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