Timberwolf TW 280PHB (Petrol), Instruction Manual

Page: 45 / 62

C190-0307 - Rev 1.0 EN 43/60
6.8 Change Blades
WARNING
SHARPEN BLADES ON A REGULAR BASIS.
FAILURE TO DO SO WILL REDUCE
PERFORMANCE, OVERLOAD THE ENGINE AND
BEARINGS, AND CAUSE MACHINE BREAKDOWN.
BLADES MUST NOT BE SHARPENED BEYOND THE
WEAR MARK. FAILURE TO COMPLY WITH THIS
COULD RESULT IN MACHINE DAMAGE, INJURY OR
LOSS OF LIFE.
Wear appropriate gloves for the blade changing operation. Always hold the blades by
the flat edges.
Take care when turning the rotor as fingers may be trapped by the fan paddles,
causing serious injury.
1. Ensure the chipper is in a safe condition. (Refer to Section 6.1 " Safe Maintenance" on
page 37.)
2. Remove the drive belts to allow the rotor to be turned. This also prevents possible
injury due to the engine compression suddenly moving the rotor. (Refer to Section 6.9
"
Adjust Rotor Drive Belt Tension" on page 45.)
3. Remove the three nuts and washers retaining the rotor housing blade access hatch
and remove the hatch (Figure 20).
Figure 20 - Rotor Housing Access Hatch Figure 21 - Locking Bar Inserted
4. Turn rotor to the blade change position.
5. Insert locking bar through rotor housing and rotor (Figure 21).
6. Brush clean the rotor and blade.
7. Using a 24 mm spanner or socket, remove the Nyloc nuts and washers from the blade
retaining bolts.
8. Hold the blade in place and remove the two retaining bolts.
9. Withdraw the blade.
10. The blade may be rotated to use the second edge, or replaced with a new or
sharpened blade.
6 Maintenance Instructions TW 280PHB (Petrol)