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9 Maintenance and repair<br />
Maintenance and cleaning METRO 0.5 to 1.5<br />
Fig. 9.2 – Screen filter<br />
[1] Screen filter<br />
[2] Filter fastener rod<br />
Prepare the hopper <strong>loader</strong> for maintenance (see "Maintenance and repair" on Page 32).<br />
Open the spring clips on the top of the unit.<br />
Open the cover.<br />
Remove the screen filter.<br />
Tap the screen filter to clean it and clean the screen filter with a vacuum cleaner.<br />
Check its condition and if necessary replace the screen filter.<br />
Structure<br />
Fig. 9.3 – Replace screen filter<br />
[1] Screen filter<br />
[2] Fastener ring<br />
Insert the screen filter so the screen filter seal contacts the fastener ring [2].<br />
Check that the screen filter [1] is correctly positioned, i.e. the rods of the filter fastener (see figure<br />
9.2) are not in the vicinity of the vacuum valve.<br />
MALFUNCTION!<br />
CAUTION!<br />
The required vacuum may not be generated if the rods of the filter fastener project<br />
above the hopper housing.<br />
Never force the cover closed.<br />
Make sure that the screen filter is precisely positioned and that the rods do not<br />
project above the hopper housing.<br />
Close the cover and lock it with the spring clips.<br />
34 Edition: November 2005
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