Service and Maintenance
BXC34
Cart Chipper
36
7.8 Ledger Knife
Observe ledger knife performance daily. Check sharpness
every 50 hours.
The ledger knife is bolted inside 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. Sharp knives
provide optimum performance and reduce the amount of power
required during operation. Periodic inspection is recommended.
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. Sharpen the
edge at 90°.
NOTE:
A Clearance Setting Gauge is available from your
dealer.
1
2
01202
Fig. 41 –
Ledger Knife in Lower Rotor Housing
1. Ledger Knife
2. Mounting Bolts / Washers
7.8.1 Ledger Knife, Adjusting Clearance
NOTE:
If the ledger knife is worn enough that the proper
clearance cannot be set, it should be replaced.
1.
Remove the bolts that hold the ledger knife to the mount.
2.
Carefully remove the knife. Pull it out and up slightly to the
side to clear the tire.
3.
Rotate the blade and replace, or replace with new or
re-sharpened blade.
4.
Hand tighten the bolts.
5.
Set the clearance between the ledger and rotor blades.
The
clearance between the rotor blades and the ledger knife
should be kept at 1/32–1/16" (.76–1.52 mm) to obtain
the best performance.
Make sure you set the ledger knife
square with the rotor blades.
6.
Apply blue Loctite® to the bolt threads and install the
ledger knife. Torque-tighten bolts to
33 lbf•ft (45 N•m)
.
7.9 Twig Breaker
The Twig Breaker is bolted onto the discharge chute. As the
discharge paddles pass around by the twig breaker, material is
further broken up as it exits the discharge chute.
When inspecting the twig breaker, look for damage such as
gouges, a bent, or missing tooth. A damaged twig breaker
should be replaced.
If the twig breaker tooth is showing wear, remove it and rotate it
around to wear on the other side.
01203
Fig. 42 –
Twig Breaker
