1. Release the retaining clamps, lift off the cap an extract the air filter.
2. Carefully clean the inside of the housing, the cover and sealing faces with a damp cloth.
3. Cleaning the filter element:
■ Use dry compressed air (≤ 72 psi!) at an angle to blow dust from the element from inside to
outside until no further dust develops.
■ The blast pipe must be long enough to reach the bottom of the element.
■ The tip of the blast pipe must not touch the element.
■ Clean sealing faces.
4. Inspect the element carefully for any damage.
Damaged filter element: Replace filter element.
5. Insert the cleaned or new filter element into the filter housing. Make sure it is properly in place
and sealed by its gaskets.
6. Replace the cap and secure with the clip.
Concluding the maintenance:
Maintenance must be acknowledged after the air filter has been maintained.
For more information about acknowledging the maintenance message and resetting the
maintenance timer, see the separate operating manual of the SIGMA CONTROL MOBIL
Precondition Air filter maintained
1. Acknowledge the maintenance message.
■ Confirm the message with the «Acknowledge» key.
■ The «Acknowledge» key is extinguished but the «Information» key is still illuminated.
2. Resetting the maintenance interval counter.
■ Simultaneously press and hold the «Acknowledge» and «Enter» keys for 2 seconds.
■ The system will automatically display the input menu for the password if no password is
active.
■ Password (for example: Customer password: 4512) enter and confirm with the keypad.
■ Simultaneously press and hold the «Acknowledge» key and «Enter» for 2 seconds.
Result The maintenance interval counter is reset and the «Information» key extinguishes.
➤ Close the doors.
Dispose of old parts and contaminated materials according to environmental regulations.
10.4.3 Fuel system maintenance
Make sure no dirt enters the fuel system during maintenance. Clean components and their sur‐
roundings before dismounting.
10 Maintenance
10.4 Engine maintenance
No.: 9_9570 07 USE
Operator Manual Screw Compressor
M250 SIGMA CONTROL MOBIL
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