Table of Contents
Advertisement
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 76
1. Extension spring
2. Stop bolt
3. Flange nut
4. Belt guide
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 cutting unit to the shop floor, remove
the belt covers from the top of the cutting unit,
and set the covers aside.
(Figure
76).
76).
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
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 and move the idler pulley away
from the belt to release the belt tension
76).
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 cutting unit
1. Hydraulic motor
5.
Lift the motor off the cutting unit and lay it on top
of the cutting unit.
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 cutting
unit after routing the belt around the pulleys.
Mount the motor to the cutting unit 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
eye 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 inches).
•
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.
61
(Figure
76).
(Figure
77).
Figure 77
2. Mounting bolts
(Figure
76).
(Figure
76) to the
(Figure
g011511
Advertisement
Table of Contents
