Checkingand Adjusting Forwarddrive Belttension; Forwardclutch Bail Adjustment - Troy-Bilt 12208 Owner's Manual

3.5/4.5/5.5/6.5 hp rear-tine tillers
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Section 5: Maintenance
Before inspecting,cleaning or servicing the machine, shut off engine, wait for all moving parts to come I
to a complete stop, disconnectspark plug wire and movewire away from spark plug. Remove ignition
key on electric start models.
I
MI
I Failure to follow these instructionscan result in serious persOnalinjUryor prOperty damage"
1
CHECKINGAND ADJUSTING
FORWARDDRIVE BELTTENSION
Maintaining correct tension on the
forward drive belt is important to good
tilling performance and long belt life.
A loose belt will slip on the engine and
transmission pulleys and cause the tines
and wheels to slow down - or stop com-
pletely - eventhough the engine is
running at full speed. A belt that is too
tight can result in unintentional tine
movement when the clutch bail is in the
Neutral (released) position.
Also check the belt for cracks, cuts or
frayed edges and replace it as soon as
possible.
• Checkbelt tension after the first two
hours of break-in operation (new belt).
• Checkbelt tension after every 10
operating hours.
To CheckForwardBelt Tension:
1. Stop the engine, wait for all parts to
stop moving and disconnect the spark
plug wire.
2. With the forward clutch bail in an open
(released) position, measure and carefully
note the overall length of the cable spring
(A, Figure 5-4) by measuring from the
outermost coil to the outermost coil.
3. Lift and hold the forward clutch bail
against the handlebar (see Figure 5-4) and
re-measurethe overall length of the coils
while the spring is under tension. The belt
tension is correct if this second measure-
ment is between 1/16" -to- 3/16" longer
than the first measurement.
4. If the spring is too short (less than
1/t6" greater than the first measurement),
the tension is too loose. If the spring is
too long (more than 3/16" greater than the
first measurement), the tension is too
tight.
5. To adjust the length of the spring:
a. Releasethe Forward Clutch Bail.
b. Unthread the hex nut (C, Figure 5-4)
about halfway up the adjustment
screw (D).
c. Unhook the top of the spring from
the forward clutch bail.
d. Use pliers to prevent the adjuster (B)
from turning and turn the slotted
screw located inside the screw
clockwise (viewed from operator's
position) to increase tension on the
spring. Turn the screw counter-
clockwise to decreasetension on the
spring. Onceadjusted, re-hookthe
top of the spring to the forward
clutch bail. (Continue to Step 5e.)
e. RepeatSteps 2 and 3 to re-measure
the length of the spring coils. When
the second measurement (with bail
closed against handlebar) is between
1/16" -to- 3/16" longer than the first
measurement,retightenthe hex nut
(C)against the top of the adjuster (B).
Replacement Belt Information
If the drive belt needsto be replaced, see
your local authorized dealer or refer to the
Parts List for ordering information. Use
only a factory-authorized belt as an "over
the counter" belt may not perform satis-
factorily. The procedure requires average
mechanical ability and commonly
availabletools.
FORWARDCLUTCH
BAIL ADJUSTMENT
If the Forward Clutch Bail does not
function properly, first check that the
forward drive belt is adjusted properly
(see"Checking and Adjusting Forward
Drive BeltTension'). Ifthis faiIsto
correct the problem, contact the factory
technical service department or your
authorized dealer for service advice.
Figure 5-4: Tocheck forwardbelt tension, take two measurementsof
the overall length of the coils in the spring - first with the clutch bail
open, then with the clutchbail closedagainst the handlebar.
22

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