Ammann APR 4920, Translation Of The Original Operating Instructions, Page: 64 / 160

7.4 Cleaning the air filter
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Re mo ve co ver (1).
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Ca re ful ly re mo ve fil ter ele ment (2)
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Check fil ter ele ment (2) for cracks or ot her da ma ge by hol ding
against the light or using a lamp.
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Cle an fil ter co ver (1) and hou sing (3).
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Re pla ce fil ter ele ment or cle an ap pro pria te.
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Chan ge the fil ter ele ment:
– if the fil ter ele ment or sea ling ring is da ma ged
– if soo ty de po sits are pre sent
– if moist or oily de po sits are pre sent
– if en gi ne per for man ce re du ces or
– if the ex haust gas chan ges co lour
– mi ni mum once a year
Ne ver ope ra te the en gi ne wit hout air fil ter ele ment.
7. Engine maintenance
59