Nilfisk-Advance City Ranger 3500 Operator's Manual page 45

3. Remove the radiator cap and completely fill the radiator
with coolant: the liquid must overflow from the radiator.
(Picture 1)
4. Put back the radiator cap.
5. Rotate the heater knob to maximum heat. (Picture 2)
6. Start the engine and leave it idling, then increase
the engine speed to maximum for ¼ hour. The level is
adjusted automatically.
7. When the liquid has cooled, check that the hose from
the coolant tank is full. (Picture 3)
8. Top up the coolant tank to half way if necessary.
Operator's Manual City Ranger 3500
Service and maintenance
1
Radiator cap
2
Heater knob
3
The hose must be full
45