Replacement - Craftsman 917.387850 Owner's Manual

Ez3 ules walk-behind mowers
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CUSTO
BILITIES
LAWN MOWER
Always observe safety rules when performing any mainte-
nance.
TIRES
o
Keep tires free of gasoline, oil, or insect control chemi-
cals which can harm rubber.
o
Avoid stumps, stones, deep ruts, sharp objects and
other hazards that may cause tire damage.
BLADECARE
.
"
_.-
For best results, mower blade must be kept sharp. Replace
bent or damaged btades.
TO REMOVE BLADE (See Fig. 10)
Disconnect spark plug wire from spark plug and place
wire where it cannot come [n contact with spark plug.
o
Turn lawn mower on its side. Make sure air filter and
carburetor are up.
Use a wood block between btade and mower housing
to prevent blade from turning when removing blade
bolt.
,
Protect your hands with gloves and/or wrap blade with
heavy cloth.
=
Remove blade bolt by turning counter-clockwise.
Use
a 9/16 box or opemend wrench.
o
Remove blade and attaching
hardware
(bolt, lock
washer and hardened washer).
NOTE:
Remove the blade adapter and check the key
ins{de hub of blade adapter.
The key must be in good
condition to work properly.
Replace adapter if damaged.
TO REPLACE BLADE (See Fig. 10)
o
Position the blade adapter on the engine crankshaft.
Be sure key in adapter and keyway in crankshaft are
aligned.
,
Position biade on the bfade adapter afigning the two (2)
holes in the blade with the raised lugs on the adapter.
=
Be sure the trailing edge is up toward the engine.
-
Installthe blade bolt withthe Iockwasher and hardened
washer into blade adapter and crankshaft.
Use block of wood between blade and lawn mower
housing and tighten the blade bolt, turning clockwise.
o
The recommended
tightening torque is 35-40 ft. Ibs.
IMPORTANT: BLADE BOLT 1SGRADE 8 HEAT TREATED.
BLADE
CRANK-
SHAFT
ADAPTER
,_,
KEYWAY
BLADE
HARDENED
WASHER
TRAILING
LOCK WASHER
EDGE
SHAFT
BLADE ADAPTER
FIG. 10
NOTE: We do not recommend sharpening blade - but if you
do, be sure the blade is balanced.
TO SHARPEN BLADE
Care should be taken to keep the blade balanced.
An
unbalanced
blade will cause eventual damage to lawn
mower or engine.
The blade can be sharpened with a file or on a grinding
wheel. Do not attempt to sharpen while on the mower.
o
To check btade balance, drive a nail into a beam or wall.
Leave about one inch of the straight
nail exposed.
Place center hole of blade over the head of the nail. If
blade is balanced, it should
remain in a horizontal
position.
If either end of the blade moves downward,
sharpen the heavy end until the blade is balanced.
GRASS CATCHER
,
The grass catcher may be hosed with water, but must
be dry when used.
,
Check your grass catcher often for damage or deterio-
ration. Through normat use it will wear.
if catcher
needs replacing,
replace only with a manufacturer
approved replacement catcher. Give the lawn mower
model number when ordering.
12

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