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Fig. 41 Draining the coolant from the engine coolant cooler (closed floor pan/stationary machine)
1
Coolant cooler
2
Coolant expansion tank
3
Filler cap
4
Shut-off valve (ball valve)
I - Open
0 - Closed
5
Coolant drain
6
Screw plug
1. Unscrew and remove the expansion tank filler cap.
2. Position a receptacle beneath the drainage location of the coolant cooler.
3. Unscrew the screw plug
6
at the coolant drain.
4. Open the shut-off valve
4
at the water cooler and catch any draining coolant.
5. Close the shut-off valve and replace the screwed sealing cap.
6. Screw in the filler cap.
7. Close the door.
➤ Dispose of used coolant in accordance with the applicable environmental protection regu‐
lations.
Removing scaling from inside the coolant cooler
After extended periods of use, scaling may form inside the cooling circuit and in particular in the
coolant cooler. Due to the resulting reduction in heat transfer, the engine may overheat.
1.
Scaling in the cooling circuit!
Damage caused by engine overheating.
➤ Use a cooler cleaning agent to remove scaling from inside the coolant cooler.
2. Read and observe the manufacturer’s instructions regarding the use of cooler cleaning agent.
3. Having drained the coolant, use a coolant cleaning agent to descale the water cooler.
10 Maintenance
10.4 Drive engine maintenance
124
Operator Manual Portable Rotary Screw Compressor
MOBILAIR M82 SIGMA CONTROL SMART
No.: 901783 08 USE
Option oe, rw, rx