9.7 Rotor Knife Maintenance
CAUTION!
Risk of getting hands pinched or wedged
between lower rotor housing and rotor. Turn
rotor slowly and be aware of hand positioning.
W032
IMPORTANT! Rotor knives can be sharpened on both sides,
as long as the correct clearance between the rotor knife and
the ledger knife is maintained.
IMPORTANT! If replacing or sharpening a blade, do the
opposite one on the rotor as well to maintain rotor balance.
The clearance must be the same for each blade as it passes
the ledger knife.
IMPORTANT! When sharpening a rotor knife, make sure
that an equal amount of material is removed from each knife
to maintain the correct rotor balance.
Inspect the rotor knives for sharpness before each use.
Sharpen the rotor knives after every 50 hours of operation.
The rotor knives and ledger knife need to be sharp for the best
performance. Keep the knives sharp to reduce the amount of
power required during operation.
Check the knife sharpness more often if you are processing
material with a lot of sand, soil, or dirt in it.
If the chipper is not
pulling the material or the material must be pushed into the
chipper, the rotor knife edges may be rounded over (are likely
dull).
Reverse, sharpen, or replace the knives if a cutting edge
becomes dull. Always replace, reverse, or sharpen both knives
at the same time.
Procedure:
1.
Open the upper housing.
2.
Carefully, turn the rotor to access the knives.
3.
Check whether the knives can be reversed, need to be
removed for sharpening, or must be replaced.
4.
To sharpen or replace the knives, remove both knives from
the rotor.
5.
Sharpen or get replacement knives.
Sharpen each knife at a 45° angle to provide the best
cutting effect.
45°
01097
Fig. 32 –
Sharpen rotor knives to a 45° angle
6.
Install the knives with the leading edge out, toward the
ledger knife (as shown).
7.
Use a calibrated torque wrench to tighten the mounting
bolts to
45 lbf•ft (63 N•m)
.
01095
Fig. 33 –
Rotor knife leading edge outward
Service and Maintenance
BXMT3213
Trailer Chipper / Shredder
42
