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➤ Confirm the maintenance with the «Quit » key.
The illuminated «Quit » and «Information» keys are extinguished.
The mixture of fuel and water and any materials contaminated with fuel must be disposed of in
accordance with environment protection regulations.
Changing the filter cartridge
Fig. 56 Changing the fuel pre-filter cartridge
1
Filter head
2
Filter cartridge
3
Water receptacle
4
Drainage tap
A
Connection for filter maintenance sensor
1. Place a receptacle beneath the fuel pre-filter.
2. Open the drainage tap and allow water and dirt to drain out into the receptacle.
3. Disconnect the filter maintenance sensor.
4. Unscrew the filter cartridge and water trap anti-clockwise and remove.
5. Disconnect the water trap from the filter cartridge by unscrewing anti-clockwise.
6. Clean any fuel from the receptacle and clean the water trap.
7. Close the drainage tap.
8. Screw the water trap onto the new filter cartridge.
9. Clean the sealing faces of the filter cartridge and filter head with a damp cloth.
10. Coat the sealing face of the new cartridge lightly with fuel and screw into the filter head.
11. Reconnect the filter maintenance sensor.
12. Activate the «battery isolating switch».
13. Close the door.
The fuel system must be bled after the filter cartridge has been changed.
Dispose of fuel and any materials and components contaminated with it in accordance with
environmental protection regulations.
Further information The engine service manual gives further information on fuel filter changing.
10 Maintenance
10.4 Engine
112
Service Manual Screw Compressor
M170 SIGMA CONTROL MOBIL
No.: 9_9425 01 E