DeWalt 900.37051 User Manual
120 Volt
CONVERTIBLE MULCHING
MOWER
Model No. 900.370510
Instruction Manual
WARNING:
Before using this product,
read this manual and follow
all its Safety Rules and
Operating Instructions.
• Safety
• Assembly
• Operation
• Maintenance
• Parts List
• Español Pág. 17
Sears, Roebuck and Co., Hoffman Estates, IL 60179 USA
www.sears.com/craftsman
Form No. 598994-00 AUG. ‘05 Printed in Mexico
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2
TABLE OF CONTENTS
GENERAL SAFETY RULES
WARRANTY
Warranty 2
Safety Instructions 2
Maintenance 4
Assembly 5
Operation 7
Maintenance Schedule 12
Product Specifications 13
Service and Adjustments 13
Storage 13
Troubleshooting 14
Illustrated Parts List 15,16
Español 17
LIMITED TWO YEAR WARRANTY ON CRAFTSMAN POWER MOWER
For two years from date of purchase, when this Craftsman Power Mower is maintained,
lubricated, and tuned up according to the operating and maintenance instructions in the
owner’s manual, Sears will repair any defect in material or workmanship free of charge.
If this Craftsman Lawn Mower is used for commercial or rental purposes, this warranty
applies for only 90 days from the date of purchase.
This Warranty does not cover:
• Expendable items which become worn during normal use, such as rotary mower
blades, blade adapters, and belts.
• Repairs necessary because of operator abuse or negligence, including bent
crankshafts and the failure to maintain the equipment according to the instructions
contained in the owner’s manual.
WARRANTY SERVICE IS AVAILABLE BY returning the Craftsman power mower to the
nearest Sears Service Center in the United States. This warranty applies only while this
product is in use in the United States.
This Warranty gives you specific legal rights, and you may also have other rights which
vary from state to state.
SEARS, ROEBUCK AND CO., DEPT. 817 WA, HOFFMAN ESTATES, IL 60179
WARNING: Do not attempt to
operate this mower until you thoroughly
read and completely understand all
instructions, safety rules, etc. contained
in this manual. Failure to comply can
result in accidents involving fire, electric
shock, or serious personal injury. Save
Owner’s Manual and review frequently
for continuing safe operation and
instructing others who may use this
mulching mower.
Safety standards require an Operator
Presence Control Switch to minimize the
risk of injury. Your unit is equipped with
such a Control Switch. Do not attempt to
defeat its function under any circumstances.
WARNING: Some dust created by
this product contains chemicals known to
the State of California to cause cancer,
birth defects or other reproductive harm.
Some examples of these chemicals are:
• compounds in fertilizers
• compounds in insecticides, herbicides
and pesticides
• arsenic and chromium from chemically
treated lumber
To reduce your exposure to these chemicals,
wear approved safety equipment such as
dust masks that are specially designed to
filter out microscopic particles.
WARNING: This product contains
chemicals, including lead, known to the
State of California to cause cancer, and birth
defects or other reproductive harm. Wash
hands after handling.
CAUTION: Wear appropriate personal
hearing protection during use. Under some
conditions and duration of use, noise from
this product may contribute to hearing loss.
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TRAINING:
• Read this operator’s manual carefully.
Become familiar with the controls and
know how to operate your mower
properly. Learn how to quickly stop mower.
• Avoid dangerous environments. Do not
use your mower in the rain or in damp or
wet locations. Do not operate it in
gaseous or explosive atmospheres.
Motors normally spark and sparks may
ignite fumes.
• Do not allow children to use your mower.
Never allow adults to use mower without
proper instructions.
• Keep the area of operation clear of all
persons, especially small children and pets.
• Use mower only as described in this
manual.
• Do not operate mower if it has been
dropped or damaged in any manner.
Always have damage repaired before
using your mower.
• Do not operate mower without the
recommended extension cord. Ensure
that the cord is in good condition before
starting mower.
• Do not use accessory attachments that
are not recommended in this manual.
Use of such attachments may be
hazardous.
• The blade always turns when the motor
is running.
• Avoid accidental starting. Do not play
with the Operator Presence Control
switch when mower is not in use.
PREPARATION:
• Always thoroughly check the area to be
mowed and clear it of all stones, sticks,
wires, bones, and other foreign objects.
These objects will be thrown by the
blade and can cause severe injury.
• Always wear safety glasses or eye
shields when starting and while using
your mower.
• Dress properly. Do not operate mower
when barefoot or wearing open sandals.
Wear only solid shoes with good traction
when mowing.
• Always make wheel height adjustments
before starting your mower. Do not
attempt to do this while the mower is
running.
• Mow only in daylight or good artificial light.
• Do not plug mower in until it is ready to
be used.
• Protect your lungs. Wear a face or dust
mask if mowing operation is dusty.
• Remove all adjusting wrenches from
mower before turning it on.
OPERATION:
The operation of any lawn
mower can result in foreign
objects thrown into the eyes,
which can result in severe eye
damage. Always wear safety glasses or
eye shields while operating your lawn
mower or performing any adjustments or
repairs. We recommend a wide vision
safety mask over the spectacles or
standard safety glasses with side
shields, available at Sears.
• Keep your eyes and mind on your
mower and the area being cut. Do not let
other interests distract you.
• Do not mow wet or slippery grass. Never
run while operating your mower. Always
be sure of your footing – keep a firm
hold on the handles and walk.
• Do not put hands or feet near or under
rotating parts. Keep clear of the
discharge opening at all times.
• Always stop the motor whenever you
leave or are not using your mower, or
before crossing driveways, walks, roads,
and any gravel-covered areas.
• Never direct discharge of material
toward bystanders or allow anyone near
the mower while you are operating it.
• Guard against electric shock. Repair or
replace damaged mower cord or
extension cord immediately.
• Don’t abuse the cord. Never pull
lawnmower by the cord. Disconnect by
gently pulling the plug, not the cord.
• Before cleaning, inspecting, or repairing
your mower, stop the motor and make
absolutely sure the blade and all moving
parts have stopped. Then unplug the
cord to prevent accidental starting.
• If lawn mower strikes a foreign object,
follow these steps:
i) Stop lawn mower. Release the switch.
ii) Unplug power cord.
iii) Inspect for damage.
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WEAR YOUR
SAFETY
GLASSES
FORESIGHT IS BETTER
THAN NO SIGHT
iv) Repair any damage before restarting
and operating the lawn mower.
• Do not operate your mower if it vibrates
abnormally. Excessive vibration is an
indication of damage; stop the motor and
safely check for the cause of vibration.
Repair as required.
• Do not run the motor indoors.
• Never cut grass by pulling the mower
towards you. Mow across the face of
slopes, never up and down or you might
lose your footing. Do not mow
excessively steep slopes. Use caution
when operating the mower on uneven
terrain or when changing directions –
maintain good footing.
• Never operate your mower without
proper guards, plates or other safety
devices in place.
• Don’t force the mower. It will do the job
better and safer at the rate for which it is
designed. When mowing on rough
surfaces or in high grass, select a higher
cutting position.
• Don’t overreach. Keep proper footing
and balance at all time.
• Stay alert. Watch what you are doing
and use common sense. Do not operate
mower when you are tired. Do not run or
rush when mowing.
• Do not operate mower while under the
influence of drugs, alcohol, or any
medication. Attempting to do so can
result in serious injury.
• Keep away from blade area. Be aware of
the risk of injury. Keep hands and feet
away from the blade.
• DANGER: DO NOT attempt to remove
cut material or unclog debris from under
mower deck while blade is moving, or
you will be seriously injured.
• If mower stalls, release operator
presence control switch and wait for
blade to stop rotating. Unplug cord
before attempting to remove anything
from under mower deck. Thoroughly
inspect and have any damage repaired
before restarting and operating mower.
MAINTENANCE AND STORAGE:
• Check the blade and the motor mounting
bolts often to be sure they are tightened
properly.
• Check all bolts, nuts and screws at
frequent intervals for proper tightness to
be sure mower is in safe working
condition.
• Keep all safety devices in place and
working.
• To reduce fire hazard, keep the motor
free of grass, leaves or excessive grease
and oil.
• Always keep the blade on your mower
sharp.
• Allow motor to cool before storing in any
enclosure.
• Keep mower dry and clean. Always use
a clean damp cloth when cleaning.
Never use brake fluids, gasoline,
petroleum-based products, solvents, or
water to clean mower.
• Do not mow if switch does not turn
mower on and off. Have defective switch
replaced at Sears Service Center.
• Check damaged parts. Before further
use of the mower, a guard or other part
that is damaged should be carefully
checked to determine that it will operate
properly and perform its intended
function. Check for alignment of moving
parts, binding of moving parts, breakage
of parts, and any other conditions that
may affect mower operation. A guard or
other part that is damaged should be
properly repaired or replaced by a
qualified service technician.
• When servicing use only identical
Craftsman replacement parts. Servicing
of this mower should be performed only
by a qualified service technician. For
repair service we suggest you return
mower to your nearest Sears Service
Center.
• When replacing blade, use only identical
Craftsman replacement blade. Use of
any other blade may result in serious
personal injury or damage to your mower.
• Store mower inside. When not in use,
mower should be stored indoors in a
garage, basement, etc. Storage area
should be a dry, locked-up place – out of
reach of children.
4
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• Maintain mower with care. Keep blade
sharp and clean for best and safest
performance. Follow instructions for
lubricating and changing accessories.
DOUBLE INSULATION
Your Mower is DOUBLE INSULATED to
give you added safety. This means that it
is constructed throughout with TWO
separate “layers” of electrical insulation, or
one DOUBLE thickness of insulation
between you and the tool’s electrical system.
Tools built with this insulation system are
not intended to be grounded. As a result,
your mower is equipped with a two-prong
plug which permits you to use extension
cords without concern for maintaining a
ground connection.
NOTE: DOUBLE INSULATION does not
take the place of normal safety precautions
when operating this mower. The insulation
system is for added protection against
injury resulting from a possible electrical
insulation failure within the tool.
CAUTION: Repair or replace damaged
cords immediately. Use only identical
Craftsman replacement parts.
POLARIZED PLUG
To reduce the risk of electric shock, this
mower has a polarized plug (one blade is
wider than the other). This mower must be
used with a suitable polarized 2 wire or 3
wire extension cord. Polarized connections
will fit together only one way. Make sure
that the receptacle end of the extension
cord has large and small blade slot
widths. If the plug does not fit fully into the
extension cord receptacle, reverse the
plug. If it still does not fit, obtain a suitable
extension cord. If the extension cord does
not fit fully into the outlet, contact a
qualified electrician to install the proper
outlet. Do not change the tool plug or
extension cord in any way.
EXTENSION CORDS
Double-insulated tools have 2 wire cords,
and can be used with 2 wire or 3 wire
extension cords. Only round jacketed
extension cords should be used, and we
recommend that they be listed by
Underwriters Laboratories (U.L.)
WARNING: To prevent electric shock
use only with an extension cord suitable
for outdoor use, such as SW-A, SJOW-A,
SOW-A, STW-A, STOW-A, SJW-A,
SJTW-A or SJTOW-A.
An extension cord must have adequate
wire size (AWG or American Wire Gauge)
for safety, and to prevent loss of power
and overheating. The smaller the gauge
number of the wire, the greater the
capacity of the cable; that is, 16 gauge
has more capacity than 18 gauge. When
using more than one extension to make
up the total length, be sure each individual
extension contains at least the minimum
wire size.
To determine the minimum wire size
required, refer to the chart below: (Refer
to your mower’s nameplate to find the
Ampere Rating)
NOTE: Using any other length or rating or
cord will diminish the performance and
possibly the life of the electric motor.
SAVE THESE INSTRUCTIONS
The replacement blade is stock # 33243
and is available at Sears Retail Stores
and Service Centers.
ASSEMBLY
CARTON CONTENTS
• Mulching Mower (Shipped with Mulch
Insert installed)
• Grassbag
• Grasscatcher frame
TO REMOVE MOWER FROM CARTON
Your mulching mower has been
completely assembled at the factory
except for the Grasscatcher.
5
MINIMUM GAUGE FOR CORD SETS
MINIMUM WIRE GAUGE RECOMMENDATIONS
VOLTS 25 FT. 50 FT. 100 FT.
16 16 14
120 A.W.G.* A.W.G.* A.W.G.*
* AMERICAN WIRE GAUGE
Stock# 33243
REPLACEMENT BLADE
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CAUTION: Do not lift the lawnmower
off the ground by holding the height
adjustment finger grip.
• Remove the Grasscatcher frame,
Grassbag and cardboard fillers.
• Remove the mower from the carton and
place all four wheels on the ground or floor.
• Check the carton thoroughly and make
sure there are no loose parts.
To Unfold Handle
Raise the handle section into place and
secure by tightening the two knobs. See
figure below.
WARNING: For your own safety DO NOT
use this mower without either the
Grasscatcher or Mulch Insert in operating
position.
GRASSCATCHER ASSEMBLY
• Slide the grassbag onto the grasscatcher
frame. (See Fig. A)
• The grassbag has attachment clips sewn
around the bag opening.
• Attach the two top clips to the frame,
then attach the side clips, and lastly the
bottom clip. (See Fig. B)
• Refer to “To Install Grasscatcher”
instruction before attaching to mower.
TO INSTALL GRASSCATCHER
• Reach down between the mower handle
and raise the rear door to a vertical
position. (See Fig. A)
• Remove the mulch insert. See page 10
To Remove Mulch Insert.
• Pick up the grasscatcher by the handle
and lower the grasscatcher between the
lawnmower handles. Position the
grass- catcher hanger hooks on the
metal rod under the rear door.
(See Fig. B).
• Release the rear door.
WARNING: Never operate the mower
unless the hanger hooks on the
grasscatcher are seated properly, and the
rear discharge door rests firmly against
the top of the grasscatcher.
6
Clip
A
A
B
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Knobs
Handle
7
KNOW YOUR MULCHING MOWER
READ THIS OWNER’S MANUAL AND SAFETY RULES BEFORE OPERATING YOUR
MULCHING MOWER. Compare the illustrations with your mulching mower to
familiarize yourself with the location of various controls and adjustments. Save this
manual for future reference.
These symbols may appear on your mulching mower or in literature supplied with the
product. Learn and understand their meaning.
MEETS CPSC SAFETY REQUIREMENTS
Sears rotary walk-behind power lawn mowers conform to the safety standards of the
American National Standards Institute and the U.S. Consumer Product Safety
Commission.
WARNING: The blade always turns when the motor is running.
Operator Presence Control Switch – Must be held to the handle to start and run the
motor. Release to stop the motor.
Door – Allows conversion from mulching or bagging operation.
Height Adjustment Control –– Allows for simple one touch height adjustment of all
four wheels at one time.
Rear Door
Grasscatcher
Handle Knob
Height
Adjustment
Control
Operator
Presence
Control
Switch
Height
Indicator
CAUTION
OR WARNING
DANGER, KEEP HANDS
AND FEET AWAY
OPERATION
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DANGER!
KEEP HANDS AND FEET AWAY!
8
Palm
Rest
Scale
Pointer
Finger
Grip
TO STOP MOWER
To stop mower fully release your grip on
the operator presence control switch.
ATTACHING EXTENSION
CORD TO MOWER
DO NOT connect the extension cord to
power source until you have finished
reading this manual and you are ready to
start mowing. Read the Polarized Plug
section on page 5 before plugging the
extension cord into the switch housing as
shown in figure below.
1. The extension cord must be polarized
and will only plug in one way. Orient the
wide slot with the wide blade in the
switch housing and plug in.
2. Make a loop in the extension cord.
3. Push the loop up through the hole in the
switch housing.
4. Place the loop over the strain relief tab
on the switch housing. Pull the
extension cord so the loop draws down
around the strain relief tab as shown in
the detail. Double check to see that you
did not loosen the extension cord plug.
TO ADJUST CUTTING HEIGHT
• Before making any adjustments, turn off,
unplug mower and wait for blade to stop
rotating.
• Use the Height Adjustment Control to
raise deck for high cut and lower deck
for low cut.
• Adjust cutting height to suit your
requirements. Medium position is best for
most lawns.
• To raise or lower the cutting height, rest
the palm of your hand on the palm rest
and with your fingers, squeeze upward
on the finger grip and hold.
• While holding the finger grip up you can
raise or lower the cutting height. The
mulcher has eight blade height
adjustment positions. Refer to the scale
and pointer at the front of the mower.
The pointer will give you the height
setting for cutting your lawn. This setting
can be a reference for the next time you
want to cut your lawn at the same height.
When you have the mower at the height
you like, simply release the finger grip to
lock the height in.
NOTE: To ensure that the deck is securely
locked in one of the eight positions, press
down on the palm rest after releasing the
finger grip.
OPERATOR PRESENCE
CONTROL SWITCH
CAUTION: Federal regulations require
an Operator Presence Control Switch to
be installed on lawn mowers in order to
minimize the risk of blade contact injury.
DO NOT under any circumstances attempt
to defeat the function of this switch.
Remem-ber that the blade always turns
when the motor is running.
The Operator Presence Control Switch is
a lever that you pull back to start and run
the mower. The switch requires you to be
positioned behind the mower handle for
mower operation.
To operate the switch, insert your finger
into the opening (A) and push the lever
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Step 3
Step 2
Step 1
Step 4
Detail
9
out so that you can grab it with your other
hand. Pull the lever back to turn the unit
on and hold it against the mower handle
to keep it running. To turn the mower off,
just release the lever. The spring loaded
“SNAP ACTION” lever will quickly turn the
mower off.
SAFETY SHIELD & REAR DOOR
The safety shield is designed to minimize
the throwing of stones or other objects by
the mower blade backward from under the
mower deck. The shield, along with the
rear door, minimizes the possibility of
accidental foot contact with the blade. DO
NOT operate mower without the safety
shield and rear door in place.
WARNING:
• For your own safety DO NOT use this
mower without either the grasscatcher or
mulch insert in operating position.
• Do not operate the lawnmower if the rear
door is not under spring tension. Take
your mower to the nearest Sears Service
Center for repair.
MOWING PROCEDURE
• Inspect area where mower is to be used
and remove all stones, sticks, wire,
bones, and other debris which might be
thrown by the rotating blades.
• Place most of the extension cord close
to the electrical outlet, out of the path of
the mower.
CAUTION: Do not plug extension
cord into receptacle outlet while standing
in water or when hands are wet.
• Begin mowing in the area closest to the
outlet. Always mow forward in a back
and forth pattern across the lawn. Keep
the cord on the cut portion of the lawn.
MOWING TIPS
• Mow across the face of slopes, never
up-and-down. Exercise extreme caution
when changing direction on slopes. Do
not mow excessively steep slopes.
Always maintain good footing.
• Release switch to turn mower “OFF”
when crossing any graveled area
(stones can be thrown by the blade).
• Set mower at highest cutting height
when mowing in rough ground or in tall
weeds.
Operator
Presence
Control
Switch
Mulch
Insert
Handle
Pocket
Rear
Door
Safety
Shield
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A
• From time to time turn off mower and
wait for the blade to come to a complete
stop. Then unplug the power cord and
turn mower on its side. Using an object
such as a stick, wipe out any
accumulation of grass in the blade area.
Be careful of the sharp edges of the
blade.
• If a grasscatcher is used during the fast
growing season, the grass may tend to
clog up at the discharge opening. Turn
the mower “OFF” and disconnect the
power cord plug. Remove the catcher
and shake the grass down to the back
end of the bag. Also clean out any grass
or debris which may be packed around
the discharge opening. Replace the
grass catcher. Clean often in wet, spring
grass.
• If mower should start to vibrate
abnormally, turn mower “OFF” and
unplug power cord. Check immediately
for cause. Vibration is a warning of
trouble. Do not operate mower until a
service check has been made.
• ALWAYS turn the mower “OFF” and
unplug the mower when leaving it
unattended even for a short period of
time.
MULCHING
• Your new mower is designed to re-cut
the grass clippings many times and
reduce them in size so that, as they fall
into the lawn, they will disperse into the
grass and not be noticed. Also, the
mulched grass will biodegrade quickly to
provide nutrients to the lawn.
• Your mower was shipped with the Mulch
Insert installed.
MULCHING MOWING TIPS
• For best performance, keep the mower
housing free of built-up grass and trash.
Clean after each use. See CLEANING in
the maintenance section of this manual.
• Avoid cutting the lawn when it is wet.
Wet grass tends to form clumps which
interfere with the mulching action. The
best time to mow your lawn is in the
early afternoon. At this time the grass is
dried and the newly cut area will not be
exposed to the direct sun. For best
results, adjust the mower cutting height
so that the mower cuts off only the top
one third of the grass blades. If the lawn
is overgrown it will be necessary to
increase the cutting height to reduce the
pushing effect and reduce overloading
the motor. For extremely heavy mulching
make narrower cuts and mow slowly.
• Certain types of grass and grass
conditions may require that an area be
mulched a second time to completely
hide the clippings. When doing a second
cut, mow across or perpendicular to the
first cut path. DO NOT mow
perpendicular to the first path if it
would require you to mow across a
hill.
• Change your cutting pattern from week
to week. Mow north to south one week
and east to west the next week. This will
help prevent matting and graining of the
lawn.
TO REMOVE MULCH INSERT
• Shut the mower off, wait until the blade
stops and unplug the mower.
• Raise the rear door and hold it up.
• Locate your hand in the handle pocket of
the mulch insert, lift and pull out the
mulch insert completely.
• The rear discharge door is spring
loaded. When you release it the door will
return to the closed position.
TO INSTALL MULCH INSERT
• Shut the mower off.
• Raise the rear door and slide the mulch
insert into the discharge opening until it
is firmly in contact with the deck.
• Release the rear door.
10
Mulch
Insert
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