Troy-Bilt 640C, 644A manual Forwardclutchbail, Handlebar Height Adjustment, Reverseclutchcontrol

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Figure3-3: FREEWHEELposition.

engine,WARNING:besure that both Beforestarting

wheelsare inWHEELDRIVE

position. See WheelsDrive Pins for instructions,

Engagingthe Forward Clutch Bail or ReverseClutch Control (if equipped) when the wheels arenot in WHEELDRIVEcould

allow the tinesto rapidly propel the tiller forward or backward.

_	caution when reversing or
	WARNING:	Useextreme

pulling the machinetowards

you. Look behindto avoid obstacles.

Neverattemptto till in reverse. Failureto follow this warning could result in personal injury or property damage.

To operatethe ReverseClutchControl:

1.Put wheels in WHEELDRIVEposition (see "WARNING" statement at the left).

2.Stop all tiller motion by releasing the Forward Clutch Bail.

the ground, look behind you to avoid any 3. Lift the handlebar until the tines clear obstacles, and then pull the control knob

(F,Figure3-4) out. The wheels and tines will rotate in a reversedirection.

4.Releasethe control knob to disengage (stop) the wheels andtines (the enginewill continue to run).

begintilling at avery shallow depth setting and gradually increasethe tilling depth.

_b	to till too deeplytoo quickly.
	ARNING:	Do not attempt

Graduallywork down to deeper tilling depths.

Placethe DepthRegulator Lever in the "travel" position before starting the engine. This position prevents thetines from touching the ground until you are readyto begintilling. Failureto follow this warning could result in personalinjury or property damage.

Travel Position

Failureto comply could cause loss of tiller control, property damage,or personal injury.

FORWARDCLUTCHBAIL

The Forward Clutch Bail(E, Figure3-4) controls the engagementof forward drive

Figure3-5: Depth Regulator Lever (G).

HANDLEBAR HEIGHT ADJUSTMENT

Thehandlebarheight is adjustableto three different settings (Figure 3-6). In general, adjust the handlebars so they areat waist

F level when the tines are3"-4" in the soil.

to the wheelsand tines.

To operate the ForwardClutchBail:

1.Put wheelsin WHEELDRIVEposition (see "WARNING" statement above).

2.Lift and hold the clutch bail (E, Figure 3-

4)againstthehandlebartostartthewheels andtines rotating in a forward direction.

3.Releasethe clutch bail to disengage

(stop) the wheels andtines (the enginewill continue to run).

REVERSECLUTCHCONTROL

(Model 644A only)

The ReverseClutch Control (F,Figure 3-4) controls the engagementof reversedrive

to the wheelsandtines. The reversing fea- ture is used for maneuveringthe tiller only-- never engage the tines in the

ground while operatingin reverse.

E

Figure3-4:AII modelshavea ForwardClutch

Bail(E). OnlyMode1644Ahavea Reverse

ClutchControl(F).

DEPTH REGULATOR LEVER

This lever (G, Figure 3-5) controls the till- ing depth of the tines. Pullthe lever back and slide it up or down to engagethe notched height settings.

The"travel position" (highestnotch) raises

the tines approximately1-1/2" off the ground, allowing the tiller to be moved

without the tines contacting the ground. This setting should also be used when starting the engine.

Moving the lever upward will increasethe tilling depth. The lowest notch allows a till-

ing depth of approximately6", depending on soil conditions. For best results,always

To adjustthe handlebars:

1.Stop engine, disconnectspark plugwire from spark plug and allow engineto cool.

2.Remove hardware,reposition handle- bars,and reinstall hardware securely.

High

Medium

Figure3-6: Handlebar height adjustment.

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