Bolens 450 Series Manuales De Servicio

1.  Always observe safety rules when performing  

any maintenance.

2.  The warranty on this chipper shredder does not 

cover items that have been subjected to operator 
abuse or negligence. To receive full value from war-
ranty, operator must maintain the chipper shredder 
as instructed here.

3.  Changing of engine-governed speed will void  

engine warranty. 

4.  All adjustments should be checked at least once 

each season.

5.  Periodically check all fasteners and make sure these 

are tight.

1.  Lubricate the release rod and spring with light oil once 

a season. See Figure 5-1.

2.  Lubricate the pivot points on the hopper assembly with 

light oil once a season. See Figure 5-1.

3.  Lubricate the pivot points on the discharge chute with 

light oil once a season. See Figure 5-1. 

4.  Follow the accompanying engine manual for lubrica-

tion schedule and instruction for engine lubrication.

1.  Maintain oil level as instructed in engine manual.
2.  Service air cleaner every 25 hours under normal 

conditions. Clean every few hours under extremely 
dusty conditions. Refer to engine manual.

3.  Clean spark plug and reset the gap once a season. 

Check engine manual for correct plug type and gap 
specifications.

4.  Clean engine regularly with a cloth or brush. Keep the 

cooling system (blower housing area) clean to permit 
proper air circulation. Remove all grass, dirt and 
combustible debris from muffler area.

If the discharge area becomes clogged, remove the flail 
screen and clean area as follows:
1.  Stop the engine and make certain the chipper shred-

der has come to a complete stop.

2.  Disconnect spark plug wire from spark plug and 

ground against the engine.

3.  a. Remove the bag and two wing knobs on each side 

of the chute deflector. See Figure 5-2.

  b. Lift the chute deflector up to keep it out of the way.
  c.  Remove the two hairpin clips from each clevis pin 

which extend through the housing and remove pins.

  d. Remove the flail screen from inside the housing 

and clean the screen by scraping or washing with 
water. See Figure 5-2.

4.  Reinstall the screen, making certain to reassemble the 

flail screen with the curve side down.

5.  Reattach the chute deflector with the hardware 

previously removed and connect the bag to unit.

1.  Disconnect the spark plug wire and ground against the 

engine.

2.  Remove the flail screen as instructed in the previous 

section.

3.  Remove the chipper chute by removing three hex nuts 

and washers.

4.  Remove the chipper chute support brace (Model 

Series 460) from the frame by removing the hex bolts. 

5.  Rotate impeller assembly by hand until you locate one 

of two chipper blades in the chipper chute opening. 

*Model 464 Shown

Lubricate these 

points before 

reassembly.

A

B

C

D

*Model 464 Shown