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Changing the filter cartridge:
Fig. 49 Change the fuel prefilter cartridge
1
Filter head
2
Filter cartridge with integrated water re‐
ceptacle
3
Draining stopper with integrated level sen‐
sor
4
Water level sensor connecting plug (fuel fil‐
ter maintenance)
5
Direction of rotation to unscrew the filter
cartridge and the water trap
1. Place a receptacle beneath the fuel prefilter housing.
2. Unscrew the draining stopper on the bottom of the filter cartridge (2 turns max.) and drain wa‐
ter and contamination.
3. Remove the connecting plug of the water level sensor.
4. Use a standard wrench to loosen and unscrew (counter-clockwise) the filter cartridge.
5. Empty any remaining fuel into a receptacle.
6. Unscrew the draining stopper of the filter cartridge and clean with lint-free cloth.
7. Check the seal of the draining stopper.
Seal damaged: replace seal.
8. Screw the draining stopper to a new filter cartridge.
9. Clean the sealing faces of the filter cartridge and filter head with a lint-free cloth.
10. Mount the filter cartridge to the filter head:
■ Moisten the sealing faces of the new filter cartridge with some fuel.
■ Manually screw the filter cartridge to the filter head (clockwise), until seal is tight.
■ Continue to manually turn until the filter cartridge is seated tightly (¾ turn approximately).
11. Fasten the connecting plug of the water level sensor.
12. Open the left-hand door.
13. Turn on the «battery isolating switch».
14. Close the doors.
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.
10 Maintenance
10.4 Drive engine maintenance
No.: 901783 08 USE
Operator Manual Portable Rotary Screw Compressor
MOBILAIR M82 SIGMA CONTROL SMART
131