Service And Adjustments - Husqvarna 7021RES Owner's Manual

SERVICE AND ADJUSTMENTS

CAUTION: TO AVOID SERIOUS INJURY, BEFORE PERFORMING ANY SERVICE OR ADJUSTMENTS:
1. Release control bar and stop engine.
2. Make sure the blade and all moving parts have completely stopped.
3. Disconnect spark plug wire from spark plug and place where it cannot come in contact with plug.
LAWN MOWER
TO ADJUST CUTTING HEIGHT
See "TO ADJUST CUTTING HEIGHT" in the Operation
section of this manual.
REAR DEFLECTOR
The rear defl ector, attached between the rear wheels of
your mower, is provided to minimize the possibility that
objects will be thrown out of the rear of the mower into
the operator's mowing position. If the defl ector becomes
damaged, it should be replaced.
TO REMOVE DRIVE BELT (See Figs. 16 & 17)
1. Disconnect spark plug wire from spark plug and place
wire where it cannot come in contact with plug.
2. Remove screws retaining drive cover (not shown); and
remove drive cover from lawn mower housing.
3. Remove drive cable from anchor, then detach it and
return spring from idler arm assembly.
4. Remove idler arm assembly from housing by removing
hex nut; then remove drive belt from drive pulley, belt
keepers and idler arm assembly.
5. Turn lawn mower on its side. Make sure air fi lter and
carburetor are up.
6. 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.
7. Remove blade bolt.
8. Remove blade, attaching hardware (bolt, lock wash er,
hardened wash er), blade adapter / pulley and debris
shield. Note that the debris shield has a screw which
fi ts into the housing.
9. Remove drive belt from engine pulley; discard old belt.
DRIVE PULLEY
BELT
KEEPERS HEX NUT
DRIVE CABLE ANCHOR
HOUSING
HOLES
DRIVE
BELT
IDLER ARM
ASSEMBLY
RETURN SPRING
FIG. 16
CRANKSHAFT
HOUSING
SCREW
TRAILING EDGE
TO REPLACE DRIVE BELT (See Figs. 16 & 17)
1. Place new drive belt on engine pulley.
2. Route the other end of the new drive belt through hole
in housing.
3. Return mower to upright position.
4. Install new drive belt into idler arm assembly, then around
the drive pulley. Be sure belt is inside of belt keepers.
5. Reattach idler arm assembly with hex nut previously
removed.
6. Turn lawn mower on its side. Make sure air fi lter and
carburetor are up.
7. Reattach debris shield to housing with tab of debris
shield in housing hole.
8. Position blade on the blade adapter / pulley aligning
the two (2) holes in the blade with the raised lugs on
the adapter.
9. Be sure the trailing edge of blade (opposite sharp edge)
is up toward the engine as shown.
10. Install the blade bolt with the lock washer and hardened
washer into blade adapter / pulley and crankshaft.
11. 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.
12. Return mower to upright position.
13. Reattach drive cable and return spring to the idler arm
assembly, then reattach drive cable to anchor.
14. Reattach drive cover with screws previously removed.
15. Connect spark plug wire to spark plug.
14
ADAPTER /
PULLEY
HARDENED
WASHER
DEBRIS
SHIELD
LOCKWASHER
FIG. 17
BLADE
BLADE
BOLT