This is a basic tutorial on how to change disc chipper blades on a professional wood chipper. The make and model shown is a 2006 Altec DC 912A. Your chipper may be different, check your operating or repair manual for specifications and warnings.
Follow shut down lock out procedure.
Remove bolts from the discharge chute/disc cover assembly.
Rotate the shoot to the left side of the chipper, in line with the disc housing.
Carefully open the upper disc housing/discharge chute assembly.
Position the disc and install disc locking pin.
Loosen anvil screws (do not remove) and push anvil back to achieve maximum clearance between anvil and blade
Remove blade bolts. Do not use impact tool to remove or install blades.
Remove blades.
Clean blade mounting surfaces.
Install new blades and bolts. Torque to specifications listed in manual.
Rotate the disc until one set of knives is adjacent to the anvil.
Slide the anvil forward until there is a 1/16th inch gap between the anvil and blade.
Tighten the adjusting bolts and nuts.
Using a light observe the distance between the anvil and knives. Slowly and carefully rotate the disc and insure consistent distance between anvil and ALL knives.
Replace all guards and covers.
And get back to work!!!!