Service and Maintenance
BXM32, BXM42
3-point Hitch Chipper-Shredder
42
9.7
Ledger Knife
Observe ledger knife performance daily. Check the ledger
knife sharpness every 50 hours.
The ledger knife is bolted in the lower rotor housing assembly.
As the rotor turns, material fed into the chipper is sheared off at
the ledger knife by the rotor blades.
When the corner of the ledger knife facing the rotor blade rounds
over, the blade can be removed and re-installed with a different
corner facing the rotor blade. Once all four corners have been
rounded, remove the knife to sharpen or replace it.
00916
Fig. 44 –
Ledger knife on lower rotor housing
To obtain the best chipper performance, check the clearance
between the rotor blade and stationary ledger blade every 50
hours.
9.7.1
Ledger Knife Clearance
Use the ledger setting gauge to check knife clearance
. The
thickness of the gauge is the correct ledger blade clearance.
If spacing is in excess of the gauge thickness, adjust the
clearance.
Checking
1.
Open the upper rotor housing.
CAUTION!
Risk of getting hands pinched or wedged
between lower rotor housing and rotor. Turn
rotor slowly and be aware of hand positioning.
W032
2.
Turn the rotor by hand so that one rotor blade edge is next
to the ledger knife.
3.
Slide the end of the ledger gauge down between the rotor
blade and the ledger knife.
00917
Fig. 45 –
Inserting Gauge
4.
Turn the rotor past the ledger knife with the gauge inserted
between them to check clearance. The gauge should be
tight. Check both knives.
1
3
2
00877
Fig. 46 –
Checking ledger knife clearance
1. Rotor Blades
2. Gauge
3. Ledger Knife