Cub Cadet I-Beam Style - Manual (Page 6)

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BELT REPLACEMENT
NOTE
There are two different crankshaft pulleys that
have been used in string trimmer production.
Some string trimmers have engines equipped
with heavy engine flywheels, while other
engines have light engine flywheels. Because
there is not a conventional blade to add rotat-
ing mass to the crankshaft, a flywheel was
added to the crankshaft pulley used on the
engines that have light engine flywheels. The
pulley flywheel is large enough that the belt
will not fit over it. The belt will fit over the pul-
ley which does not have a flywheel attached
to it. Because of this difference, there are two
different procedures for replacing the drive
belt. The first steps of both procedures are
the same. See Figure 1-15.
Figure 1-15.
IMPORTANT: Allow the engine to cool if it has
been running.
1. Disconnect and ground the spark plug wire.
2. Drain the fuel tank.
3. Position the trimmer so the rear edge of the
trimmer base is resting securely on a work
bench, and pivot the handle down.
NOTE
The handle should be securely weighted
down, so the trimmer stands on end.
4. Remove the hex nuts from the carriage bolts
that secure the deflector shield to the trimmer
base using a 7/16" wrench.
5. Remove the carriage bolts and the deflector.
Remove the belt keeper from the tensioner
pulley by loosening the lock nut with a 1/2"
wrench.
6. Remove the belt keeper from the tensioner
pulley by loosening the lock nut with a 1/2"
wrench.
7. Remove the V-Belt from the Idler pulley.
8. Grasp the idler bracket assembly and pull
inward until the belt can be removed from the
spindle assembly.
NOTE
The torsion spring applies tension to the belt
brake at rest, and must be moved away from
the belt for removal.
9. Unhook the “Z” fitting (at the end of the
engagement cable) from the idler bracket.
See Figure 1-16.
Figure 1-16.
10. Loosen, but do not remove the three nuts that
secure the belt keeper, and spindle assembly
to the trimmer base using a 1/2" wrench.
TRIMMERS WITH PULLEY FLYWHEELS
NOTE
For trimmers equipped with pulley fly wheels,
perform steps 1 through 10, then follow these
steps;
01 String Trimmers.fm Page 5 Tuesday, February 19, 2002 1:05 PM