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WARNING
Damaged air filter element.
Wear in the engine from intake of contaminated air.
➤ Do not try to clean the filter element by striking or knocking it.
➤ Do not wash the filter element.
Fig. 51 Engine air filter maintenance
1
Maintenance indicator
2
Red zone indicator scale
3
Indicating piston of the maintenance indi‐
cator
4
Reset knob for the maintenance indicator
5
Filter element
6
Retaining clip
7
Filter cap
Fig. 52 Cleaning the filter element
1
Compressed air gun with blast pipe bent to 90° at the end
2
Filter element
Checking contamination of the air filter:
Air filter maintenance is necessary when the yellow piston inside the maintenance indicator reaches
the red zone.
1. Open the left-hand door.
2. Check the air filter maintenance indicator.
If the yellow piston reaches the red zone, clean or renew the filter element.
3. Close the door.
10 Maintenance
10.4 Engine
108
Service Manual Screw Compressor
M170 SIGMA CONTROL MOBIL
No.: 9_9425 01 E