26
6.2
Changing the blast wheel blades and impeller
Remove the spare shot hopper.
Remove the clamps of the abrasive valves.
Disconnect the wire of the abrasive valves.
Lift out both abrasive valves.
Remove all abrasive and clean the blast wheels and blades with air.
Block the blast wheels and remove the central fixing bolt.
Remove the impeller using a wooden or brass drift.
Through the opening of the blast housing: use a wooden or brass drift to tap out all six blades from the
blast wheel towards the center of the blast wheel. Place the wooden or brass tool at lowest position of
the blade. (See drawing.)
Use a new central fixing bolt when mounting new blast
wheel blades.
Replace the blades with six new ones and re-assemble
the machine in reverse order.
Note:
blast wheel blades
must be replaced as a set. Replacing only some of the
blades can cause imbalance of the blast wheel.
