Troy-Bilt 643C Benutzerhandbuch

6

To prevent 

personal injury or property 
damage, do not start the engine 
until all assembly steps are 
complete and you have read 
and understand the safety and 
operating instructions in this 
manual.

Carefully follow these assembly steps to 
correctly prepare your tiller for use. It is 
recommended that you read this Section in 
its entirety before beginning assembly.

Inspect the unit and carton for damage im-
mediately after delivery. Contact the carrier 
(trucking company) if you find or suspect 
damage. Inform them of the damage and 
request instructions for filing a claim. To 
protect your rights, put your claim in writ-
ing and mail a copy to the carrier within 15 
days after the unit has been delivered. 
Contact Troy-Bilt LLC if you need assis-
tance in this matter.

(2) 1/2” open-end wrench*
(2) 9/16" open-end wrench*

(1) 3/8" open-end wrench*
(1) Large adjustable wrench

(Models 643B & 645A only)

(1) Scissors (to trim plastic ties)
(1) Ruler (for belt tension check)

(1) Block of wood (to support tiller when

removing wheels)

(1) Tire pressure gauge (for models with 

pneumatic tires)

(1) Clean oil funnel
(1) Motor oil. Refer to the Engine Owner’s

Manual for oil specifications and
quantity required. 

* Adjustable wrenches may be used.

NOTE: While unpacking, do not severely 
bend any control cables.

1. The tiller weighs approximately 133 lbs. 
Do not attempt to remove it from the ship-
ping platform until instructed to do so in 
these Assembly steps. 

2. Remove any packaging material from 
the carton. Remove any staples from the 
bottom of the carton and remove the car-
ton from the shipping platform.

3. Remove all unassembled parts and the 
separate hardware bag from the carton. 
Check that you have the items listed in the 
Loose Parts List (contact your local dealer 
or the factory items are missing or dam-
aged). 

NOTE:  Use the screw length template
(Fig. 2-1) to identify screws.

Handlebar Support (see A, Fig. 2-2)

Handlebar Assembly (see K, Fig. 2-2)

Hex hd. screw, 5/16-18 x 1-1/2"

Hex hd. screw, 3/8-16 x 3/4"

Flat Washer, 3/8"

Split lock washer, 5/16"

Hex nut, 5/16"-18

Hex locknut, 3

⁄8"-16

*Models 643B & 645A only

Motor oil must be added to 

the engine crankcase before the engine is 
started. Follow the instructions in this 
Section and in the separate Engine 
Owner’s Manual.

NOTE: LEFT and RIGHT sides of the tiller
are as viewed from the operator’s position
behind the handlebars.

1. Loosely attach the legs of the handlebar 
support (A, Fig. 2-2) to the inner sides of 
the tiller frame using two 3/8"-16 x 3/4" hex 
hd. screws (B), 3/8" flat washers, and 3/8"-
16 hex locknuts.

2. Using two 5/16"-18 x 1-1/2" screws (C), 
5/16" split lock washers (D) and 5/16"-18 
hex nuts (G), loosely attach the handlebar 
support (A) using the upper holes. Tighten 
the two screws securely.

3. There are three height adjustment holes 
in the two handlebar support brackets (E 
and F, Fig. 2-2). Use a setting that will po-
sition the handlebars at approximately 
waist level when the tines are 3"-4" into the 
soil. Loosely attach the support brackets to 
the outside of the handlebar assembly (I) 
using two 5/16"-18 x 1-1/2” screws (G), 5/
16" split lock washers (D) and 5/16"-18 hex 
nuts (G). NOTE: If a support bracket will 
not move, loosen attaching screw (H) and 
nut.

The support brackets must 

be assembled to the outside of the 
handlebar assembly.

4. Tighten all handlebar mounting hard-
ware securely.

To roll the tiller off the shipping platform, 
put the wheels in freewheel, as follows: 

1. Place a sturdy block under the transmis-
sion to raise one wheel about 1" off the 
ground.

Remove the hairpin cotter (L, Fig. 2-3) and 
wheel drive pin (M) from the wheel hub (O) 
and wheel shaft (N).