Checking the Belt Tension
Service Interval:
Every 250 hours
1.
Park the machine on a level surface, lower the
cutting unit, engage the parking brake, shut off
the engine, and remove the key.
2.
Loosen the 4 captive bolts that secure the top
and bottom of the belt cover to the machine
(
).
g319558
Figure 26
1.
Belt cover captive bolts
g320055
Figure 27
1.
Idler pulley nut
2.
Idler pulley post nut
3.
Loosen, but do not remove, the idler pulley nut
(
).
Note:
To loosen the idler pulley nut, you will
need to hold the bolt that secures it in place on
the inside of the deck.
4.
Adjust the nut on the idler pulley post to tension
the belt (
5.
Push down on the belt to check the tension as
follows (
):
•
For a new belt, you should be able to push
the belt down 5 mm (1/5 inch) using 6.0 to
6.5 kg (13.2 to 14.3 lb) of force.
•
For a used belt, you should be able to push
the belt down 5 mm (1/5 inch) using 5.1 to
5.6 kg (11.2 to 12.3 lb) of force.
g313475
Figure 28
1.
Belt without force
2.
Belt deflected 5mm (0.2
inches)
Note:
Use a single barrel tension meter to
measure the tension.
6.
Adjust the nut on the idler pulley post as
necessary to tighten or loosen the belt.
7.
Rotate the rotor manually a couple of turns and
check the belt tension again; if the tension is
incorrect, check and adjust until it is correct.
8.
Tighten the idler pulley nut; torque to 47 to 57
N∙m (34 to 42 ft-lb).
9.
Install the belt cover (
20
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