Service And Adjustments - Husqvarna 67521HV 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. 16–19)
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 and remove drive
cover from lawn mower housing (See Fig. 16).
SCREWS
DRIVE
COVER
3. Remove drive cable from anchor, then detach it and
return spring from idler arm assembly (See Fig. 17).
DRIVE DRIVE RETURN
PULLEY BELT SPRING
4. Pivot idler arm assembly to slacken drive belt, then
remove drive belt from drive pulley and idler arm.
5. Turn lawn mower on its side. Make sure air fi lter and
carburetor are up.
LAWN
MOWER
HOUSING
FIG. 16
DRIVE CABLE HOUSING
ANCHOR HOLE
IDLER ARM
ASSEMBLY
PIVOT
FIG. 17
6. Remove screw securing debris shield. Note that the
debris shield has a tab which fi ts into a gap in the
housing (See Fig. 18).
CRANKSHAFT
HOUSING
HOLE
SCREW TRAILING EDGE
7. 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.
8. Remove blade bolt.
9. Remove blade, attaching hardware (bolt, lock wash er,
hardened wash er), blade adapter and debris shield as
one assembly.
10. Remove drive belt from blade adapter and debris shield;
discard old belt.
TO REPLACE DRIVE BELT (See Figs. 16–19)
1. Place new drive belt in the belt retainer of the debris
shield. Be sure to route belt between belt keepers and
through slot as shown (See Fig. 19).
BELT RETAINER
BELT
KEEPERS
DRIVE
BELT
13
TAB
BLADE
ADAPTER
HARDENED
WASHER
BLADE
DEBRIS
BOLT
SHIELD
LOCK-WASHER
FIG. 18
TAB
DEBRIS
SLOT SHIELD
FIG. 19