1B20, 1B30, 1B40, 1B50 Operation and use
HATZ
55Manual
7.9 Check the air filter warning indicator (option)
Overview
1 Rubber bellow
2 Green field
Procedure
Step Activity
1 Bring the engine briefly to maximum speed.
2 When the rubber bellow (1) contracts and covers over the green
field (2), immediately check the air filter system (see chapter
8.2.12 Maintaining the dry air filter, page 84).
3 Check the rubber bellow (1) several times daily under dusty con-
ditions.
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