Troy-Bilt TUFFY 1634A Operator's Manual page 20

,_ WARNING:
Beforeinspecting, cleaning or servicing the machine,shut off engine, wait for all
moving parts to come to a complete stop, disconnect spark plug wire and move wire away from
spark plug. Failureto follow these instructions can result in serious personal injury or property
damage.
FORWARDCLUTCH
BAIL ADJUSTMENT
If the Forward Clutch Bail does not func-
tion properly, first checkthat the forward
drive belt is adjusted properly (see Check-
ing and Adjusting Forward Drive Belt Ten-
sion). If this fails to correct the problem,
contact Troy-Bilt LLC or your authorized
dealer for service advice.
CHECKING ANDADJUSTING RE-
VERSEDRIVEBELTTENSION
(Model 634A only)
It is important to maintain correct tension
on the reversedrive belt. A loose belt will
causethe tines and wheels to slow down -
or stop completely - eventhough the en-
gine is running at full speed.
Whenchecking belttension, also checkthe
belt for cracks, cuts or frayed edgesand
replace it as soon as possible.
• Checkbelt tension after the first two
hours of break-in operation and after every
10 operating hours.
To CheckReverse BeltTension:
1. Stop engine, wait for all parts to stop
moving and disconnect spark plug wire.
2. Removescrew in plastic belt cover and
slide belt cover (which is attachedto for-
ward clutch cable) out of the way.
3. Have an assistant pull the Reverse
Clutch Control knob all the way out and
hold it in that position. Measurethe length
of the cable wire between the end of the
threaded cableadjuster (A, Figure5-5) and
the end of the Z-fitting (B) to which the ca-
ble wire is attached.
4. Thebelt tension is ideal if the cablewire
length measuresbetween1/8"to 1/4".If it is
less than 1/8" (and if there is no reverseac-
tion whenthe tiller is running), then make
the following adjustments
NOTE:If the lengthis morethan 1/4",no ad-
justment is needed--as long asthe reverse
action functions properly.
5. Releasethe ReverseClutch Control
knob.and then unthread the inner jam nut
(C, Figure 5-6) one to two turns. Pull the
threaded cable adjuster (A, Figure 5-6) to
the left until the inner jam nut (C) touches
the bracket.
6. Preventthe inner jam nut (C) from turn-
ing and tighten the outer jam nut (D)
against the bracket. Prevent the outer jam
nut (D) from turning and tighten the inner
jam nut (C) against the bracket.
7. Measure the gap by repeating Step 3.
Readjust as needed by repeating Steps 5
and 6.
8. Reinstall the belt cover.
Figure5-5: Measure cable wire length to
checkfor correct reversebelt tension.
Figure 5-6: Movethreaded adjuster ( ,4)toleft
toincrease belt tension.
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
mechanicalability and commonly available
tools.
ENGINECLEANING
Keepingthe engine clean will help to en-
sure smooth operation and prevent dam-
age from overheating. Refer to the Engine
Owner's Manualfor engine cleaning ser-
vice intervals and instructions. Be sure
that the muffler is cool beforeservicing the
engine.
AIRCLEANER SERVICE
The air cleaner filters dirt and dust out of
the air before it enters the carburetor. Op-
erating the engine with a dirty, clogged air
filter can cause poor performance and
damageto the engine. Never operatethe
engine without the air cleanerinstalled. In-
spect and service the air cleaner more of-
ten if operating in very dusty or dirty
conditions. Refer to the engine Owner's
Manualfor air cleanerservice intervals and
instructions.
ENGINE OIL SERVICE
Checkthe engine oil level before each use
and after every five hours of continuous
operation. Runningthe engine when it is
low on oil will quickly ruin the engine.
It is recommendedthat you changethe
motor oil after every 10 hours of operation
and even sooner when operating in ex-
tremely dirty or dusty conditions. Referto
the Engine Owner's Manual for detailed
service instructions.
A. To Checkthe Engine Oil Level:
1. Parkthe tiller on a levelareaand shut off
the engine.
2. Levelthe engine (use the Depth Regula-
tor Leverto adjust the engine angle).
2O