Fig. 54 Emptying the fuel prefilter water trap
1
Fuel prefilter with water trap
2
Water receptacle
3
Dewatering tap
1. Place a receptacle beneath the fuel prefilter.
2. Open the dewatering tap and allow water and dirt to drain out into the receptacle.
3. Close the dewatering tap.
4. Switch the «battery isolating switch» on.
5. Close the access door.
Maintenance must be acknowledged after the water trap has been emptied.
Precondition Draining the water trap
➤ Confirm the maintenance with the «Acknowledge» key.
The illuminated «Acknowledge» 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. 55 Changing the fuel prefilter cartridge
1
Filter head
2
Filter cartridge
3
Water receptacle
4
Dewatering tap
A
Connection for filter maintenance sensor
1. Place a receptacle beneath the fuel prefilter.
2. Open the dewatering 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.
10 Maintenance
10.4 Engine
112
Service Manual Screw Compressor
M135 SIGMA CONTROL MOBIL
No.: 9_6975 00 E