Husqvarna 55C21HV 用户手册

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. 18).

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.

1.   Place new drive belt in the belt retainer of the debris 

shield.  Be sure to route belt between belt keepers and 
through slot (See Fig. 21). 

3.      Remove drive cable from anchor, then detach the drive 

cable spring from idler arm assembly (See Fig. 19).

4.   Pivot idler arm assembly to slacken drive belt, then 

remove drive belt from drive pulley, belt keepers and 
idler arm.

5.   Turn lawn mower on its side. Make sure air fi lter and 

carburetor are up.

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. 20).

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. 

2.    Route the other end of the new drive belt through hole 

in housing.

3.   Reattach debris shield to housing with screw previ-

ously removed.  Be sure tab of debris shield is in gap 
of housing.

4.   Position blade on the blade adapter aligning the two 

(2) holes in the blade with the raised lugs on the 
adapter.

5.      Be sure the trailing edge of blade (opposite sharp edge) 

is up toward the engine (See Fig. 20).

6.      Install the blade bolt with the lock washer and hardened 

washer into blade adapter and crankshaft.