Wallenstein BXT72S, Руководство оператора

Страница: 62 / 76

9.10 Ledger Knife Maintenance
WARNING!
Do not operate the machine with any of the
guards or shields removed. The machine is
shown with guards or shields removed for
illustrative purposes only.
W001
WARNING!
Do not reach into the rotor housing. The
rotor and ledger knives are very sharp. If it is
necessary to reach into the rotor housing, set the
machine to a safe condition, wear heavy gloves,
and be very careful.
W003
9.10.1 Replace a Ledger Knife
1. Stop the engine. Wait for the rotor to stop turning.
For instructions, see
Stop the Machine on page 33.
2. Remove the fastener that holds the upper rotor housing
closed. See
Figure 22 on page 38.
3. Open the upper rotor housing.
4. Remove the two ledger knife fasteners.
5. Carefully, remove the ledger knife.
6. Do one of the following:
• If the ledger knife has a square (90-degree) edge, install
the ledger knife with the square edge pointing toward
the rotor knife.
• If the ledger knife does not have a square edge, sharpen
or replace the ledger knife.
For instructions, see
Sharpen a Ledger Knife.
7. Align the ledger knife with the bolt holes in the lower rotor
housing.
8. Install the ledger knife fasteners.
9. Set the ledger knife clearance.
For instructions, see
Set the Ledger Knife Clearance on
page 63.
10. Use a calibrated torque wrench to torque the fasteners to
115 lbf•ft (155 N•m).
11. Close the upper rotor housing.
12. Install the fastener that holds the upper rotor housing
closed. See
Figure 22 on page 38.
13. Use a calibrated torque wrench to torque the fastener to
80 lbf•ft (110 N•m).
01600
02286
1
2
3
Figure 46 –
Ledger knife adjustment assembly (typical)
1. Ledger knife
2. Ledger knife fastener
3. Ledger knife adjustment rod
9.10.2 Sharpen a Ledger Knife
IMPORTANT! If the ledger knife gets hot during sharpening,
stop and wait for the ledger knife to cool.
1. Remove the ledger knife from the machine.
For instructions, see
Replace a Ledger Knife on page 62.
2. Clean the ledger knife.
3. Examine the ledger knife for damage. If a ledger knife is
damaged, replace the ledger knife.
4. Put the ledger knife in a bench vice with the cutting edge
facing up.
Make sure that the ledger knife is clamped safely in the
bench vice.
5. Use a grinder to sharpen the cutting edge of the ledger knife
to a 90-degree angle. See
Figure 47.
6. Do steps 4 and 5 for the opposite cutting edge.
01098
90°
90°
Figure 47 –
Sharpen to a 90° angle
Service and Maintenance
BXT72S
Wood Chipper
62