Troy-Bilt 640C-Tuffy Benutzerhandbuch

10

Before 

operating your machine, 
carefully read and understand 
all safety, controls and 
operating instructions in this 
Manual, the separate Engine 
Owner’s Manual, and on the 
decals on the machine.
Failure to follow these 
instructions can result in 
serious personal injury.

This Section describes the location and 
function of the controls on your tiller. Refer 
to the following Section, Operation for de-
tailed operating instructions.

Practice using these controls, with the en-
gine shut off, until you understand the op-
eration of the controls and feel confident 
with each of them.

Refer to the engine manufacturer’s Engine 
Owner’s Manual (included in the tiller liter-
ature package) to identify the controls on 
your engine. 

IMPORTANT: The control for stopping the 
engine is located on the engine.

Each wheel is equipped with a wheel drive 
pin (A, Figures 3-2 and 3-3) that secures 
the wheel to the wheel shaft (B). The 
wheels can be positioned in either a 
WHEEL DRIVE or a FREEWHEEL mode.

Never allow 

either of the wheels to be in the 
FREEWHEEL position when the 
engine is running. Always put 
both wheels in the WHEEL 
DRIVE position before starting 
the engine.
Failure to comply could cause 
loss of tiller control, property 
damage, or personal injury.

Before starting the engine, put both wheels 
in the WHEEL DRIVE position by inserting 
the wheel drive pins through the wheel 
hubs and the wheel shaft. Doing so “locks” 
the wheels to the wheel shaft, causing the 
wheels to turn when either the 

Forward Clutch Bail (all models) or the Re-
verse Clutch Control (Model 6

44A) is en-

gaged.

Use the FREEWHEEL mode only when the 
engine is not running. In FREEWHEEL, the 
wheel drive pins are placed only through 
the holes in the wheel shaft (not the wheel 
hubs), thus allowing the wheels to turn 
freely when you manually move the tiller.

To place the wheels in WHEEL DRIVE or 
FREEWHEEL:
1. Stop engine, disconnect spark plug wire 
from spark plug and allow engine to cool.

Do not place 

tiller on its side when changing 
wheel drive positions. Doing so 
could result in gasoline leaking 
from the fuel tank.
Failure to follow this instruction 
could result in personal injury 
or property damage.

2. Raise one wheel about one inch off the 
ground and place a sturdy support under 
the transmission.

3. Remove hairpin cotter (C, Figures 3-2 
and 3-3) from wheel drive pin (A).

4. FOR WHEEL DRIVE MODE (Figure 3-2): 
Slide wheel outward and align holes in 

wheel hub (D, Figure 3-2) and wheel 
shaft (B). Insert wheel drive pin (A) 
through wheel hub (D) and wheel 
shaft (B). Secure wheel drive pin with hair-
pin cotter (C) by pushing hairpin cotter in 
as far as it will go. Repeat with the other 
wheel and then remove the support from 
beneath the transmission.

5. FOR FREEWHEEL MODE (Figure 3-3): 
Slide the wheel inward and insert the wheel 
drive pin (A, Figure 3-3) only through the 
hole in the wheel shaft (B). Secure wheel 
drive pin with hairpin cotter (C) by pushing 
hairpin cotter in as far as it will go. Repeat 
for the other wheel and then remove the 
support from beneath the transmission.