10.9.3.2 Changing the filter elements
The breathing air filter contains two different element and both must be changed as a pair. Note
location.
Do not touch the filter element with bare fingers!
Material Spares
Filter wrench
Cleaning cloths
Precondition Machine cooled down.
The «battery isolating switch» is off.
➤ Open the right-hand access door.
1. Open the breathing air filter drain tap to release any remaining pressure.
2. Change the lower filter element (high performance element)
■ Unscrew the lower housing anti-clockwise.
■ Draw the filter element down and out.
■ Clean the lower housing and sealing surface with a lint-free cloth.
■ Check the housing gasket.
Change if damaged.
■ Insert a new lower filter element.
■ Screw on the lower housing clockwise.
3. Change the upper filter element (adsorption insert).
■ Unscrew the upper housing anti-clockwise.
■ Draw the filter element up and out.
■ Clean the lower housing and sealing surface with a lint-free cloth.
■ Check the housing gasket.
Change if damaged.
■ Insert a new filter element.
■ Screw on the upper housing clockwise.
4. Close the drain tap.
Further information Further information on changing elements can be found in the operating instructions in chap‐
1. Switch the «battery isolating switch» on.
2. Close the access door.
Function and leakage check
1. Start the machine and run for approximately 5 minutes.
2. Shut down the machine.
3. Wait until the machine has automatically vented.
Pressure gauge reads 0 bar.
4. Open the outlet valves.
5. Check the breathing air filter housing and hose line for leaks.
10 Maintenance
10.9 Options
146
Service Manual Screw Compressor
M135 SIGMA CONTROL MOBIL
No.: 9_6975 00 E
