Husqvarna XT722FE owner manual Lawn Mower, Engine

MAINTENANCE

LAWN MOWER

Always observe safety rules when performing maintenance.

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 front drive 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 area and must be cleaned to free drive wheels.

If necessary to clean the drive wheels, be sure to clean both front wheels.

1.	Remove hubcaps, locknuts 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.Install the blade bolt with the lock washer and hardened washer into blade adapter and crankshaft.

5.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. lbs.

IMPORTANT: BLADE BOLT IS HEAT TREATED. IF BOLT NEEDS REPLACING, REPLACE ONLY WITH APPROVED BOLT SHOWN IN THE REPAIR PARTS SECTION OF THIS MANUAL.

BLADE ADAPTER	KEY	CRANKSHAFT
		KEYWAY
BLADE
LOCK
WASHER
		CRANK-
		SHAFT
BLADE
BOLT
HARDENED	TRAILING EDGE	BELT RETAINER
WASHER

4. Put wheels back in place.

NOTE: If after cleaning, the drive wheels do not turn freely,

TO SHARPEN BLADE

FIG. 11

contact a qualified service center.

BLADE CARE

For best results, mower blade must be kept sharp. Replace a bent or damaged blade.

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.

TO REMOVE BLADE (See Fig. 11)

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).

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 damaged.

TO REPLACE BLADE (See Fig. 11)
1.	Position the blade adapter on the engine crankshaft. Be
	sure key in adapter and crankshaft keyway 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	10
	edge) is up toward the engine.

NOTE: We do not recommend sharpening blade - but if you do, be sure the blade is balanced.

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 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.

GEAR CASE

•To keep your drive system working properly, the gear case and area around the drive should be kept clean and free of trash build-up. Clean under the drive cover twice a season.

•The gear case is filled with lubricant to the proper level at the factory. The only time the lubricant needs atten- tion is if service has been performed on the gear case.

GRASS CATCHER

•The grass catcher may be hosed with water, but must be dry when used.

•Check your grass catcher often for damage or dete- rioration. Through normal use it will wear. If catcher needs replacing, replace only with approved replace- ment catcher shown in the Repair Parts section of this manual. Give the mower model number when ordering.

ENGINE

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.