45
Truck operation with no expansion tank plug is prohibited!
The material the cooling system expansion tank is made of allows checking coolant level
in the tank visually.
1-expansion tank; 2-expansion tank plug; 3-steam hose from the engine; 4- steam hose from the expansion
tank; 5-water return hose; 6-fan; 7-casing; 8-radiator; 9-filler with radiator plug; 10- charge air cooler; 11-
radiator frame; 12-water supply branch pipe; 13-drain plug; 14- water supply piping from the tank to water
pump
Fig. 27 - Cooling System Diagram
5.1.4.3 Monitoring the coolant temperature in the cooling system is carried out using
the temperature gauge.
When the temperature increases in the cooling system over a 90 °C, the coolant tempera-
ture alarm lights up.
With burning alarm, further travelling is possible with careful observation of the coolant
temperature gauge. A short, no more than 10 minutes, temperature rise to 100°C is possible.
5.1.4.4 To drain the coolant from the cooling system place the truck flat, or inclined
forward, and unscrew the plug located in the lower radiator tank, the cab heater valve and plug in
the heater boiler and pump unit.