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Draining the coolant (machine with chassis):
In machines with chassis (no closed floor pan, no stationary machine), the entire coolant of the
cooling circuit is drained directly at the engine's coolant cooler. Draining is carried out via a shut-off
valve by means of a separate drain hose.
Fig. 40 Draining the coolant from the engine coolant cooler
1
Coolant expansion tank
2
Filler cap
3
Coolant cooler
4
Coolant drain
5
Drain hose with male fitting
6
Quick-release coupling
7
Shut-off valve (ball valve)
I - Open
0 - Closed
1. Unscrew and remove the expansion tank filler cap
2
.
2. Position a collecting vessel beneath the water cooler drain point (hole in the floor panel).
3. Connect a suitable drain hose
5
to the coolant cooler quick-release coupling
6
.
4. Place the free end of the hose in the receptacle and secure.
5. Open the shut-off valve
7
and catch the draining coolant.
6. Close the shut-off 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.
Draining the coolant (closed floor pan/stationary machine):
On stationary machines and machines with closed floor pan, lines draining oil and coolant from the
motor and compressor are led to a central point outside the machine. The coolant is drained via a
pipe which is screwed into the drain opening of the cooler and closed with a shut-off valve. The
pipe is sealed with a screw plug at the drain end.
10 Maintenance
10.4 Drive engine maintenance
No.: 901783 08 USE
Operator Manual Portable Rotary Screw Compressor
MOBILAIR M82 SIGMA CONTROL SMART
123
Option oe, rw, rx