BXC34 / BXC34 Bundle
Wood Chipper
Service and Maintenance
43
9.8.1 Sharpen the Ledger Knife
If the ledger knife has been sharpened on all corners and it is
no longer possible to set the correct clearance with the rotor
knives, replace the ledger knife.
1.
Sharpen the long edges of the knife at a 90° angle on each
side.
2.
Install the ledger knife and use the ledger knife clearance
gauge to set the correct clearance.
3.
Use a calibrated torque wrench to tighten the bolts to
33 lbf•ft (45 N•m)
.
01098
90°
90°
Fig. 34 –
Sharpen a ledger knife
9.8.2 Set the Ledger Knife Clearance
If the correct clearance cannot be set because the
ledger knife is damaged, rotate or replace the knife.
1.
Loosen the ledger knife bolts.
2.
Move the ledger knife forward (toward the rotor knives).
Hand tighten the bolts.
3.
Turn the rotor until one of the rotor knives is directly aligned
with the ledger knife.
Use the ledger knife clearance gauge to set the clearance
between the two knives. Tap the ledger knife toward the
rotor knife.
If a ledger knife clearance gauge is not available, set the
clearance to between 1/32" and 1/16" (1 mm to 1.5 mm).
4.
Use a calibrated torque wrench to tighten the bolts to
33 lbf•ft (45 N•m)
.
9.9 Twig Breaker Maintenance
The twig breaker is attached to the discharge chute. When the
rotor paddles pass by the twig breaker, the material is further
broken up as it exits the discharge chute.
When inspecting the twig breaker, look for damage such as
gouges, or a bent or missing tooth. Replace a twig breaker that
is damaged.
If the twig breaker tooth is worn, remove it and rotate it to wear
on the other side.
01203
Fig. 35 –
Twig Breaker
