Tires; Drive Wheels; Blade Care; To Replace Blade - Husqvarna HU725AWDH Operator's Manual

MAINTENANCE
LAWN MOWER
Always observe safety rules when performing any main-
tenance.
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.
DRIVE WHEELS
Check wheels each time before you mow to be sure they
move freely.
The wheels not turning freely means trash, grass cuttings,
etc. are in the drive wheel or dust cover area and must
be cleaned to free drive wheels. If necessary to clean the
drive wheels, be sure to clean all wheels.
1. Remove hubcaps, Iocknuts and washers.
2. Remove wheels from wheel adjusters.
3. Remove any trash or grass cuttings from inside the
dust cover, pinion and/or drive wheel gear teeth.
4. Put wheels back in place.
NOTE: If after cleaning, the drive wheels do not turn freely,
contact a qualified service center.
BLADE CARE
For best results, mower blade must be kept sharp. Replace
bent or damaged blades.
CAUTION: Use only a replacement
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.
2. Install debris shield.
3. Position blade on the blade adapter.
iMPORTANT: TOENSUREPROPER ASSEMBLY, C ENTERHOLE
IN BLADE MUSTALIGN WITH STAR ON BLADEADAPTER.
4. Be sure the trailing edge of blade (opposite sharp
edge) is up toward the engine.
5. Install the blade bolt with the lock washer and hardened
washer into blade adapter and crankshaft.
6. Use block of wood between blade and lawn mower
housing and tighten the blade bolt, turning clockwise.
The recommended tightening torque is 35-40 ft. Ibs.
iMPORTANT: BLADEBOLTIS HEATTREATED.IF BOLTNEEDS
REPLACING,REPLACE ONLYWITH APPROVED BOLT.
J
BLADE _ _ "="== SHAFT
ADAPTER KEYWAY
BELT
DEBRIS
SHIELD EDGE
HARDENED
WASH ER
LOCK WASH ER
BLADE BOLT
FIG. 14
TO REMOVE BLADE (See Fig. 14)
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 housing
to prevent blade from turning when removing 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
washer and hardened washer).
6. Remove debris shield.
NOTE: Removethe blade adapter and checkthe key inside
hub of blade adapter. The key must be in good condition
to work properly. Replace adapter if damaged.
TO REPLACE BLADE (See Fig. 14)
1. Position the blade adapter on the engine crankshaft.
Be sure key in adapter and crankshaft keyway are
aligned; and that the drive belt is inside the tab of the
belt retainer.
TO SHARPEN BLADE (See Fig. 15)
NOTE: We do not recommend sharpening blade - but if
you do, be sure the blade is balanced. An unbalanced
blade will cause eventual damage to lawn mower or engine.
• The blade can be sharpened with afile or on a grinding
wheel. Do not attempt to sharpen while on the mower.
• To check blade balance, you will need a 5/8" diameter
steel bolt, pin, or a cone balancer. (When using a
cone balancer, follow the instructions supplied with
balancer.)
NOTE: Do not use a nail for balancing blade. The lobes
of the center hole may appear to be centered, but are not.
Slide blade on to an unthreaded portion of the steel
bolt or pin and hold the bolt or pin parallel with the
ground. 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.
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