Lawn Mower; Blade Care; Lubrication - Husqvarna 7021P Operator's Manual

LAWN MOWER

Always observe safety rules when performing main te nance.
TIRES
• Keep tires free of gasoline, oil, or insect control chem i-
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 dam aged blades.
CAUTION:
blade approved by the manufacturer of
your mower. Using a blade not approved
by the manufacturer of your mower is
hazardous, could damage your mower
and void your warranty.
TO REMOVE BLADE (See Fig. 12)
1. Disconnect spark plug wire from spark plug and place
wire where it cannot come in contact with plug.
2. Turn lawn mower on its side. Make sure air filter and
carburetor are up.
3. Use a wood block between blade and mower hous ing
to prevent blade from turning when re mov ing blade
bolt.
NOTE: Protect your hands with gloves and/or wrap blade
with heavy cloth.
4. Remove blade bolt by turning counter-clockwise.
5. Remove blade and attaching hardware (bolt, lock
wash er and hardened wash er).
NOTE: Remove the blade adapter and check the key inside
hub of blade adapter. The key must be in good condition
to work properly. Replace adapter if dam aged.
TO REPLACE BLADE (See Fig. 12)
1. Position the blade adapter on the engine crank shaft.
Be sure key in adapter and crankshaft key way are
aligned.
2. Position the blade on the blade adapter aligning the
two (2) holes in the blade with the raised lugs on the
adapter.
3. Be sure the trailing edge of blade (opposite sharp
edge) is up toward the engine.
4. Install the blade bolt with the lock washer and hard ened
washer into blade adapter and crank shaft.
5. Use block of wood between blade and lawn mower
housing and tighten the blade bolt, turning clock wise.
• The recommended tightening torque is 35–40 ft. lbs.
(47–54 Nm).
IMPORTANT: BLADE BOLT IS HEAT TREATED. IF BOLT NEEDS
REPLACING, REPLACE ONLY WITH APPROVED BOLT.
TO SHARPEN BLADE
NOTE: We do not recommend sharp en ing blade - but if
you do, be sure the blade is balanced. An un bal anced
blade will cause eventual damage to lawn mower or engine.
MAINTENANCE
Use only a replacement
• The blade can be sharp ened 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 ex posed.
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
LOCK WASH-
ER
BLADE
BOLT
HARDENED
WASHER
GRASS CATCHER
• The grass catcher may be hosed with water, but must
be dry when used.
• Check your grass catcher often for damage or de te-
ri o ra tion. Through normal use it will wear. If catcher
needs replacing, replace only with ap proved replace-
ment catcher. Give the mower model number when
ordering.
ENGINE
Maintenance, re pair, or re place ment of the emission con trol
de vic es and sys tems, which are be ing done at the cus tom-
ers expense, may be performed by any non-road engine
repair es tab lish ment or individual. Warranty repairs must
be performed by an authorized engine man u fac tur er's
service outlet.

LUBRICATION

Use only high quality detergent oil rated with API service
classification SG–SL. Select the oil's SAE viscosity grade
according to your expected operating temperature.
NOTE: Multi-viscosity oils (5W30, 10W30 etc.) improve
starting in cold weather, and you should check your engine
oil level frequently to avoid possible engine damage from
running low on oil.
11
CRANKSHAFT
KEY
TRAILING EDGE CRANKSHAFT
FIG. 12
KEY WAY