Husqvarna 560sr - Manual (Page 10)

CUSTOMER RESPONSIBILITIES
10
LAWN MOWER
Always observe safety rules when performing any mainte-
nance.
TIRES
• Keep tires free of gasoline, oil, or insect control chemi-
cals which can harm rubber.
• Avoid stumps, stones, deep ruts, sharp objects and
other hazards that may cause tire damage.
BLADE CARE
For best results, mower blade must be kept sharp. Re-
place bent or damaged blades.
TO REPLACE BLADE (See Fig. 12)
• Turn lawn mower on its side. Make sure air filter and
carburetor are up.
• Use a wood block between blade 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, lock washer and flat washer.
• Remove blade and blade adapter.
• Inspect the key inside blade adapter. Replace adapter
if damaged.
IMPORTANT: BLADE BOLT IS GRADE 8 HEAT TREATED.
• Install new or sharpened blade with trailing edge up
toward the engine.
• Position blade on blade adapter. Align the two (2)
holes in blade with raised lugs of adapter.
• Reassemble blade bolt, lock washer and flat washer
into blade adapter and crankshaft in exact order as
shown.
• Position block of wood between blade and mower
housing.
• Tighten blade bolt securely. Recommended tightening
torque is 35-40 ft. lbs.
NOTE: We do not recommend sharpening blade - but if
you do, be sure the blade is balanced.
FIG. 12
TO SHARPEN BLADE
Care should be taken to keep the blade balanced. An unbal-
anced blade will cause excessive vibration and eventual damage
to lawn mower and engine.
•
The blade can be sharpened with a file or on a grinding
wheel. Do not attempt to sharpen while on the mower.
• To check blade 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.
BLADE ADAPTER
BLADE
BOLT
HARDENED
WASHER
LOCK WASHER
BLADE
ADAPTER
KEY
BLADE
TRAILING
EDGE
CRANKSHAFT
KEYWAY
CRANKSHAFT
GRASS CATCHER
• The grass catcher may be hosed with water, but must be dry
when used.
• Check your grass catcher often for damage or deterioration.
Through normal use it will wear. If catcher needs replacing,
replace only with a manufacturer approved replacement
catcher. Give the lawn mower model number when order-
ing.
DRIVE WHEELS (See Fig. 13)
Check rear drive wheels each time you mow to be sure they move
freely. The wheels not turning freely means trash, grass cuttings,
etc., may be inside the drive wheel and dust cover area and must
be cleaned out to free drive wheels.
If necessary to clean the drive wheels, check both rear wheels.
• Remove hubcaps and locknuts.
• Remove wheels from wheel adjuster axles.
• Remove any trash or grass cuttings from inside the dust
cover, pinion and/or drive wheel gear teeth.
• Clean and lubricate with grease before reinstalling. Refer to
Fig. 1 for correct assembly of drive pawl.
• The pinion gear must be installed with the left gear on the left
side and with the right gear on the right side, from an
operator's view.
• The pinion gear is stamped with an "L" (left) or "R" (right) on
the inside. If installed incorrectly, the drive system will not
work.
• Place wheels back on adjuster axles.
• Replace locknuts and hubcaps.
NOTE: Pinions and drive pawls should be cleaned and lubri-
cated with grease approximately every 25 hours or once a year.
FLAT
WASHER
DUST COVER
LOCKNUT
WHEEL
HUBCAP
FIG. 13
DRIVE PAWL
DRIVE
PINION
E RING