briggs--stratton 5900302 用户手册

Regular Maintenance

D

A

B

 1.  Sharpen the mower blade with a grinder, hand file, 

or electric blade sharpening.

 2.  Sharpen the mower blade by removing an equal 

amount of material from each end of the mower 
blade.

 3.  Keep the original bevel (A, Figure 25) when 

grinding.  Do NOT change the mower blade bevel.

 4.  The mower blade should have a maximum 1/64” 

(0,40 mm) cutting edge (B) or less.

 5.  Balance the mower blade before installing.

 1.  Clean the mower blade to remove any dried grass 

or other debris.

 2.  See Figure 26.  Put the mower blade on a nail in a 

vise and turn the blade to the horizontal position.

 3.  Check the balance of the mower blade.  If either 

end of the mower blade moves downward, 
sharpen the heavy end until the mower blade is 
balanced.  See SHARPENING THE MOWER 
BLADES for proper sharpening instructions.

 4.  Repeat the process until the mower blade remains 

in the horizontal position.

 1.  Reinstall each mower blade with the air lifts 

pointing up towards the mower deck as shown in 
Figure 27.  Secure with the mower blade mounting 
bolt and flat washer (A & B, Figure 27).

 2.  Wedge a wooden block between the mower blade 

and the mower deck housing to keep the mower 
blade from turning and torque to 70 ft. lbs (94 Nm).

Not 

for  

Reproduction