Section 5: Maintenance

WARNING Before inspecting, cleaning or servicing the unit, shut off engine, wait for all parts to come to a complete stop, disconnect spark plug wire and move wire away from spark plug. Failure to follow these instructions can result in serious personal injury or property damage.

 

re-measure the 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

ENGINE

than the first measurement.

4. If the spring is too short (less than

 

 

1/16" greater than the first measurement),

 

the tension is too loose. If the spring is

 

too long (more than 3/16" greater than the

D

first measurement), the tension is too

tight.

 

C

5. To adjust the length of the spring:

a. Release the Forward Clutch Bail.

 

b. Unthread the hex nut (C, Figure 5-4)

A

about halfway up the adjustment

screw (D).

B

c. Unhook the top of the spring from

 

the forward clutch bail.

Figure 5-3: Install tines so that cutting edge of tines will enter soil first when tiller moves

 

d. Use pliers to prevent the adjuster (B)

forward.

 

 

 

 

from turning and turn the slotted

 

 

 

CHECKING AND ADJUSTING

2. With the forward clutch bail in an open

screw located inside the screw

FORWARD DRIVE BELT TENSION

(released) position, measure and carefully

clockwise (viewed from operator’s

position) to increase tension on the

Maintaining correct tension on the

note the overall length of the cable spring

(A, Figure 5-4) by measuring from the

 

spring. Turn the screw counter-

forward drive belt is important to good

outermost coil to the outermost coil.

 

clockwise to decrease tension on the

tilling performance and long belt life.

3. Lift and hold the forward clutch bail

 

spring. Once adjusted, rehook the

A loose belt will slip on the engine and

 

top of the spring to the forward

against the handlebar (see Figure 5-4) and

clutch bail. (Continue to Step 5e.)

transmission pulleys and cause the tines

 

 

 

 

 

and wheels to slow down – or stop com-

 

 

5

pletely – even though the engine is

 

 

 

 

 

running at full speed. A belt that is too

 

 

4

tight can result in unintentional tine

 

 

3

movement when the clutch bail is in the

 

 

A

 

 

Neutral (released) position.

 

2

Also check the belt for cracks, cuts or

C

1

 

frayed edges and replace it as soon as

B

 

 

 

 

 

possible.

D

 

 

 

 

 

• Check belt tension after the first two

Hold bail against handlebar while

hours of break-in operation (new belt).

taking second measurement of

 

• Check belt tension after every 10

 

 

spring

operating hours.

 

 

 

To Check Forward Belt Tension:

1.Stop the engine, wait for all parts to

stop moving and disconnect the spark

Figure 5-4: To check forward belt tension, take two measurements of

plug wire.

the overall length of the coils in the spring – first with the clutch bail

 

open, then with the clutch bail closed against the handlebar.

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Troy-Bilt 12180 owner manual Engine, Checking and Adjusting, To Check Forward Belt Tension