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Fig. 49 Draining the coolant from the radiator
1
Filler cap
2
Coolant expansion tank
3
Water cooler
4
Radiator drain
5
Drain valve (ball)
6
Quick-release coupling
7
Drain hose with male fitting
1. Unscrew and remove the expansion tank filler cap
1
.
2. Position a coolant receptacle beneath the radiator (hole in the floor panel).
3. Connect a suitable drain hose
7
to the radiator quick-release coupling
6
.
4. Lead the hose through the hole in the floor panel and into the receptacle, securing it in place.
5. Open the drain valve
5
and drain the coolant.
6. Close the drain valve and remove the drain hose.
7. Screw on the filler cap.
8. Close the door.
➤ Dispose of used coolant in accordance with environmental protection regulations.
Further information The operating manual supplied by the engine manufacturer provides further information on coolant
change and cleaning the cooling system.
Draining coolant (stationary compressors):
Compressor cooling oil and engine coolant drain lines are led to a central point outside the machine
on stationary machines. Coolant is drained via a hose screwed into the radiator drain point. The hose
is provided with a shut-off valve and a plug.
Precondition Machine cooled down.
The «battery isolating switch» is off.
10 Maintenance
10.4 Engine
106
Service Manual Screw Compressor
M170 SIGMA CONTROL MOBIL
No.: 9_9425 01 E
Option sc, si