55
After engine stop list the cab, add the coolant up to the lower edge of the neck if neces-
sary and close the cap tightly. Lower down the cab, add coolant through the reserve tank neck up
to “MIN” mark (on the tank surface) while the cab eating system valve is open. Start the engine
for 1-2 minutes to evacuate air from the system.
After engine stop add coolant to the reserve tank if necessary. Coolant level should be be-
tween “MIN” and “MAX” marks.
Coolant system temperature is controlled
by the sensor installed on the engine. When
cooling system temperature rises above 100 °С, coolant overheating indicator flashes on. Herein
temperature increase up to 105 °С (for maximum 10 minutes) is allowed, and the truck can move
further with strict temperature control. If the temperature is not lowering, find the cause of engine
overheating and eliminate it.
To drain the coolant
from the cooling system put the truck on a horizontal platform or
forward declined, and unscrew the plug located on the bottom radiator tank, open cab heater and
heater boiler valves.
Herein filler neck reserve tank cap should be open. Undrainable coolant volume at
opened cab heater valve should be approximately 2 litres.
Do not start the engine after the coolant is drained to evacuate its residue from the sys-
tem: it can lead to cylinder sealing rubber rings damage, valve seat falling out, heat burn and
scorch.
4.1.5 Power Unit Suspension
The power unit is installed on four piers: two front and two side piers.
Each of the front piers consists of an upper engine front pier bracket 7, lower engine
front pier bracket 5 and a pad 6 shown in figure 42.
The bracket 7 is fastened to the engine. Lower
bracket 5 is fastened to the frame by rivets. The pads 6 reduce shock stress and absorb reaction
torque.
Rear side piers consist of side engine supports 3, installed on the clutch housing, and rear
supports 4 installed on the frame. Rear engine support 4 functions as an absorber.
Summary of Contents for 4320M
Page 1: ...URAL 4320М TRUCK and its Modifications ...
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