Blade Sharpening; Preventing Corrosion; Maintenance - Black & Decker CM1640 Instruction Manual

may tend to clog up at the discharge opening. Release bail handle to
turn mower off and remove the safety key. 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.
5. If mower should start to vibrate abnormally, release bail handle to
turn mower off and remove safety key. Check immediately for cause.
Vibration is a warning of trouble. Do not operate mower until a service
check has been made. Refer to troubleshooting guide in manual.
6. ALwAys RELEAsE bAIL hANDLE To TuRN MowER off AND
REMoVE sAfETy kEy whEN LEAVING IT uNATTENDED EVEN
foR A shoRT pERIoD of TIME.
ThE foLLowING suGGEsTIoNs wILL hELp you To obTAIN
opTIMuM RuN TIME fRoM youR CoRDLEss MowER:
1. Slow down in areas where the grass is especially long or thick.
2. Avoid mowing when the grass is wet from rain or dew-soaked.
3. Cut your lawn frequently, especially during high growth periods.
NoTE: IT Is RECoMMENDED ThAT youR MowER bE
REChARGED AfTER usE To pRoLoNG ThE bATTERy LIfE.
fREQuENT ChARGING wILL NoT hARM youR bATTERy, AND
wILL ENsuRE ThAT ThE bATTERy Is fuLLy ChARGED AND
READy foR ITs NExT usE. sToRING bATTERy NoT fuLLy
ChARGED wILL shoRTEN bATTERy LIfE.
REMoVING AND INsTALLING bLADE
DANGER: RIsk of INjuRy. WHEN REASSEMBLING THE
BLADE SYSTEM, ENSURE EACH PART IS REINSTALLED
CORRECTLY, AS DESCRIBED BELOW. IMPROPER ASSEMBLY
OF THE BLADE OR OTHER PARTS OF THE BLADE SYSTEM MAY
CAUSE SERIOUS INjURY.
1. WARNING: RELEASE BAIL HANDLE TO TURN MOWER OFF,
WAIT FOR THE BLADE TO STOP, AND REMOVE SAFETY KEY AND
BATTERY PACK.
2. Cut a piece of 2x4 wood (26) (about 2 feet long) (610 mm) to keep
blade from turning while removing bolt (27).
3. Wear gloves and proper eye protection. Turn the mower on its side.
Be careful of sharp edges of blade. Position wood and unscrew bolt
with 13mm wrench (28) as shown in figure V.
4. Remove bolt and washer (29). Note the orientation of each part as you
remove it. Pull off blade (30), blade insulator (31), and fan (32) as shown
in figure x. Examine all pieces for damage and replace if necessary.
5. To reassemble, slide the fan (32) onto the mower with the blades of
the fan facing the mower (far right picture in figure x), then slide
the blade insulator on with the D-shaped posts facing out away from
the mower and fan. The blade can only be attached to the insulator
in one direction. Line up the D-shaped holes of the blade with the
D-shaped posts of the insulator, ensuring the writing on the blade
faces out away from the mower and insulator.
6. To tighten firmly, position the piece of wood as shown in figure w
to keep the blade from turning. Slide the bolt and washer through all
other pieces and securely tighten with the wrench.
V
28
27
26
x
29
27
w
30 31

bLADE shARpENING

KEEP BLADE SHARP FOR BEST MOWER PERFORMANCE. A DULL
BLADE DOES NOT CUT GRASS CLEANLY.
USE PROPER EYE PROTECTION WHILE REMOVING,
SHARPENING, AND INSTALLING BLADE. ENSURE THAT SAFETY
KEY AND BATTERY PACK IS REMOVED.
Sharpening the blade twice during a mowing season is usually sufficient
under normal circumstances. Sand causes the blade to dull quickly. If
your lawn has sandy soil, more frequent sharpening may be required.
REPLACE BENT OR DAMAGED BLADE IMMEDIATELY.
whEN shARpENING ThE bLADE:
1. Make sure blade remains balanced.
2. Sharpen blade at the original cutting angle.
3. Sharpen cutting edges on both ends of blade, removing equal
amounts of material from both ends.
To shARpEN bLADE IN A VIsE: (figure y)
1. Be sure the bail handle is released, the blade has stopped and
safety key and battery pack removed before removing the blade.
2. Remove blade from mower. See instructions for removing and
installing blade.
3. Secure blade (30) in a vise (33).
4. Wear proper eye protection and gloves and be careful not to cut yourself.
5. Carefully file the cutting edges of the blade with a fine tooth file (34)
or sharpening stone, maintaining the original cutting edge.
6. Check balance of blade. See instructions for blade balancing.
7. Replace blade on mower and tighten securely.
bLADE bALANCING (figure Z)
Check balance of the blade (30) by placing center hole in the blade
over a nail or round shank screwdriver (35), clamped horizontally in
a vise (33). If either end of the blade rotates downward, file that end.
Blade is properly balanced when neither end drops.
y
34
30
LubRICATIoN
No lubrication is necessary. Do not oil the wheels. They have plastic
bearing surfaces which require no lubrication.
CLEANING
Release bail handle (3) to turn mower off, let the blade come to a stop
and then remove safety key. Use only mild soap and a damp cloth to
clean the mower. Clean out any clippings which may have accumulated
on the underside of the deck. After several uses, check all exposed
fasteners for tightness.

pREVENTING CoRRosIoN

Fertilizers and other garden chemicals contain agents which greatly
accelerate the corrosion of metals. If you mow in areas where fertilizers
or chemicals have been used, the mower should be cleaned immediately
afterward as follows: (1) Release bail handle (3) to turn mower off and
unplug mower. Wipe all exposed parts with a damp cloth.
CAUTION:
DO NOT POUR OR SPRAY WATER ON THE MOWER
IN AN ATTEMPT TO CLEAN IT. Do not store the tool on or adjacent to
fertilizers or chemicals. Such storage can cause rapid corrosion.
MEETs CpsC sAfETy REQuIREMENTs
Black and Decker Mowers conform to the safety standards of the
American National Standards Institute, and the U.S. Consumer Product
32
Safety Commission. The Blade turns when the motor is running.

MAINTENANCE

IMPORTANT: To assure product SAFETY and RELIABILITY,
repairs, maintenance and adjustment (including brush inspection and
replacement) should be performed by BLACK & DECKER Service
Centers or other qualified service organizations, always using Black
& Decker replacement parts. When servicing use ONLY IDENTICAL
REPLACEMENT PARTS.
7
Z
33
33
30
35