Manual

WARNING: Beforeinspecting, cleaning or servicing the machine,shut off engine, wait for all
moving partsto come to a complete stop, disconnect spark plug wire and move wire awayfrom
spark plug. Failureto follow these instructions can result in serious personalinjury or property
damage.
FORWARDCLUTCH
BAILADJUSTMENT
If the ForwardClutch Bail does not func-
tion properly,first checkthat the forward
drive belt is adjusted properly (see Check-
ing andAdjusting ForwardDrive Belt Ten-
sion). If this fails to correct the problem,
contact Troy-Bilt LLC or your authorized
dealerfor service advice.
CHECKING AND ADJUSTING RE-
VERSE DRIVE BELT TENSION
(Models 634F/634B only)
It is important to maintain correct tension
on the reversedrive belt. A loose belt will
causethe tines andwheelsto slow down -
or stop completely - even though the en-
gine is running at full speed.
Whenchecking belt tension, alsocheckthe
belt for cracks, cuts or frayed edges and
replace it as soon as possible.
• Checkbelt tension after the first two
hours of break-in operationand after every
10 operating hours.
ToCheckReverseBelt Tension:
1. Stop engine, wait for all parts to stop
moving anddisconnect spark plug wire.
2. Removescrew in plastic belt coverand
slide belt cover (which is attached to for-
ward clutch cable) out of the way.
3. Havean assistant pull the Reverse
Clutch Control knob all the way out and
hold it inthat position. Measurethe length
of the cable wire betweenthe end of the
threadedcableadjuster (A, Figure5-5) and
the end of the Z-fitting (B) to which the ca-
ble wire is attached.
4. Thebelt tension is idealifthe cablewire
length measuresbetween1/8" to 1/4". If it
is lessthan 1/8"(and if there is no reverse
actionwhenthe tiller is running),then make
the following adjustments
NOTE:Ifthe lengthis morethan 1/4",noad-
justment is needed--as long as the reverse
actionfunctions properly.
5. Releasethe ReverseClutch Control
knob.and then unthread the inner jam nut
(C, Figure 5-6) oneto two turns. Pull the
threaded cableadjuster (A, Figure 5-6) to
the left until the innerjam nut (C) touches
the bracket.
6. Preventtheinnerjam nut(C)fromturn-
ing and tighten the outer jam nut (D)
againstthe bracket. Preventthe outer jam
nut (D) from turning and tighten the inner
jam nut (C) againstthe bracket.
7. Measurethe gap by repeating Step 3.
Readjustas neededby repeatingSteps 5
and 6.
8. Reinstall the belt cover.
Figure5-5: Measurecablewirelengthto
checkforcorrectreversebelttension.
Figure5-6: Movethreadedadjuster(,4)toleft
toincreasebelttension.
ReplacementBelt Information
If the drive belt needsto be replaced,see
your local authorized dealeror 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 procedurerequires average
mechanicalability andcommonly available
tools.
ENGINECLEANING
Keepingthe engineclean will helpto en-
sure smooth operation and prevent dam-
agefrom overheating. Referto the Engine
Owner'sManual for engine cleaning ser-
vice intervals and instructions. Besure
thatthe muffler is cool beforeservicing the
engine.
AIRCLEANERSERVICE
Theair cleaner filters dirt and dust out of
the air before it enters the carburetor. Op-
erating the enginewith a dirty, clogged air
filter can causepoor performance and
damageto the engine. Neveroperate the
enginewithout the air cleaner installed. In-
spect and servicethe air cleaner more of-
ten if operating in very dusty or dirty
conditions. Referto the engine Owner's
Manualfor air cleanerservice intervalsand
instructions.
ENGINEOILSERVICE
Checkthe engineoil level before each use
andafter everyfive hours of continuous
operation. Running the engine when it is
low on oil will quickly ruin the engine.
It is recommendedthat you change the
motor oil after every 10hours of operation
and even sooner when operating in ex-
tremely dirty or dusty conditions. Referto
the EngineOwner's Manual for detailed
service instructions.
A. ToChecktheEngine0il Level:
1. Parkthe tiller on a levelareaand shut
off the engine.
2. Levelthe engine (use the Depth Regu-
lator Lever to adjust the engineangle).
2O