2. Unscrew the union nuts
1
and
3
and place the components with connections carefully to one
side.
3. Pull out the plug to the solenoid valve
10
and withdraw the cable.
4. Pull out the plug to the sensor
14
and withdraw the cable.
5. Remove the screws
8
securing the cover
7
to the tank.
6. Remove the protective guard
15
from the relief valve.
7. Carefully lift the cover and put to one side.
Take particular care with the following components:
■ The oil scavenge line
2
screwed to the underside of the cover.
■ The pressure relief valve, covered by the guard plate
15
.
8. Take out the old cartridge
13
and sealing rings
11
.
9. Clean all sealing surfaces, taking care that no foreign bodies (dirt particles) fall into the oil sep‐
arator tank.
10. Insert the new oil separator cartridge with sealing rings and screw down the cover.
11. Unscrew the dirt trap at position
3
.
12. Renew the strainer and sealing ring in the dirt trap.
13. Screw the dirt trap back in.
14. Replace the relief valve guard plate
15
.
15. Replace and tighten all fittings.
16. Check the oil level in the oil separator tank.
Top up if necessary.
17. Switch the «battery isolating switch» on.
18. Close the access door.
Dispose of the old separator cartridge and sealing rings, along with any working materials con‐
taminated with cooling oil, in accordance with environment protection regulations.
Starting the machine and carrying out a trial run
1. Start the machine and run in idle up to operating temperature.
2. Close the outlet valves.
3. Shut down the machine.
4. Wait until the machine has automatically vented.
Pressure gauge reads 0 bar.
5. Open the outlet valves.
6. Check the oil level after about 5 minutes.
Top up if necessary.
7. Carry out a visual check for leaks.
10.5.7 Air filter maintenance
Clean the filter according to the maintenance schedule or if the maintenance indicator shows this to
be necessary.
Renew the air filter element after 2 years or after it has been cleaned 5 times.
10 Maintenance
10.5 Compressor
No.: 9_6975 00 E
Service Manual Screw Compressor
M135 SIGMA CONTROL MOBIL
131