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NOTE
Failure to replace the blades
will eventually result in
machine failure. Late blade
change can permanently
damage the machine so that
future blade life is reduced.
4990616006 Date: 06/16
Maintenance
5.7
Checking the blade wear
Under normal working conditions, the blades should last for a considerable
period.
Using the drawing (fig 10) below, check the blade wear as follows:
1.
Remove the pipework from the most convenient port (upper is
usually the easy option).
2.
Turn the rotor until one of the blade slots lies perpendicularly
opposite the port (it will not be central).
3.
Push the blade down to the bottom of the slot and measure the
distance from blade to the top of the slot (dimension 'A' shown
below).
4.
The performance of the machine will begin to deteriorate when this
measurement reaches 16 mm (i.e. blade width is 36mm).
Replace the blades before this happens.
Figure 10. Blade change.
GD150 Installation, Operating & Maintenance Manual
New blade
"A"
Worn blade requiring
replacement
"A" = Blade wear
Page 17
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