Bolens 645A サービスマニュアル

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WARNING
The tine clutch control 
is a safety device. 
Never attempt to 
bypass its operation.
Use extreme care 
when handling 
gasoline. Gasoline is 
extremely flammable 
and the vapors are 
explosive. Never
 fuel 
the machine indoors 
or while the engine 
is hot or running. 
Extinguish cigarettes, 
cigars, pipes, and 
other sources of 
ignition.
Keep hands and feet 
away from the tines. 
Refer to warning label 
on the unit.
WARNING: Before operating your 
machine, carefully read and under-
stand all safety (Section 1), controls 
(Section 3) and operating instruc-
tions (Section 4) 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.
INTRODUCTION
Read this Operation Section and the separate Engine 
Owner’s Manual before you start the engine. Then, take 
the time to familiarize yourself with the basic operation 
of the tiller before using it in the garden. Find an open, 
level area and practice using the tiller controls without 
the tines engaging the soil (put tines in “travel” setting). 
Only after you’ve become completely familiar with the 
tiller should you begin using it in the garden.
BREAK-IN OPERATION
Perform the following maintenance after the first two (2) 
hours of new operation (see Maintenance Section in this 
manual and in the Engine Owner’s Manual).
1.  Change engine oil.
2.  Check for loose or missing hardware on unit. Tighten 
or replace as needed.
3.  Check tension on forward drive belt.
4.  Check transmission gear oil level.
STARTING AND STOPPING 
Pre-Start Checklist
With the spark plug wire disconnected from the spark 
plug, perform the following checks and services before 
each use:
1.  Read the Safety and Controls Sections in this 
manual. Read the separate Engine Owner’s Manual 
provided with the unit.
2.  Put the wheels in the WHEEL DRIVE position (wheel 
pins must be through holes in wheel hubs and wheel 
shaft).
3.  Check unit for loose or missing hardware. Service as 
required.
4.  Check engine oil level. See Engine Owner’s Manual.
5.  Check that all safety guards and covers are in place.
6.  Check air cleaner and engine cooling system. See 
Engine Owner’s Manual.
WARNING: GASOLINE IS HIGHLY 
FLAMMABLE AND ITS VAPORS ARE 
EXPLOSIVE. Follow gasoline safety 
rules in this Manual (see Section 1) 
and in the separate Engine Owner’s 
Manual.
Failure to follow gasoline safety 
instructions can result in serious 
personal injury and property damage.
7.  Fill the fuel tank with gasoline according to the direc-
tions in the separate Engine Owner’s Manual. Follow 
all instructions and safety rules carefully.
8.  Attach spark plug wire to spark plug.
Starting the Engine
The following steps describe how to start and stop the 
engine. 
WARNING: Do not attempt to engage 
the tines or wheels until you have read 
all of the operating instructions in this 
Section. Also, review the safety rules 
in Section 1: Safety, and the tiller and 
engine controls information in Section 
3: Features and Controls.
1.  Complete the Pre-Start Checklist on this page. 
2.  Put the wheels in the WHEEL DRIVE position (see 
Wheel Drive Pins in Section 3 of this manual). 
WARNING: To help prevent serious 
personal injury or damage to equip-
ment:
• 
Before starting engine, put both wheels in the 
WHEEL DRIVE position. Never have wheels in 
FREEWHEEL position when engine is running. 
When the wheels are in FREEWHEEL, they do not 
hold back the tiller and the tines could propel the 
tiller rapidly forward or backward.
•  Before starting engine, put Forward Clutch Bail 
(all models) and Reverse Clutch Control (Models 
643B & 645A only) in neutral (disengaged) posi-
tions by releasing levers.
•  Never run engine indoors or in enclosed, poorly 
ventilated areas. Engine exhaust contains carbon 
monoxide, an odorless and deadly gas.
•  Avoid engine muffler and nearby areas. Tempera-
tures in these areas may exceed 150° F.
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Figure 4-1: Tiller features and controls.  See separate Engine 
Owner’s Manual to identify engine controls.
Operating 
Your Tiller