Cab heater control
When switching the heater on, ensure
that the following conditions are met:
1. After filling the cooling system,
start the engine and let it work at a
medium rotational speed to heat wa-
ter to the temperature of
+50C…+60C, after which open the
valve (1), increase the engine rota-
tional speed and after 1-2 min make
sure that the cooling fluid circulates
through the heat exchanger by open-
ing slightly the drain valve cap (5) on
the cab right side. The heat exchang-
er shall start warming-up. Then the
cooling fluid level in the engine cool-
ing system radiator will decrease.
2. Add cooling fluid into the radiator
to the required level (50…60 mm be-
low the upper edge of the filler neck).
3. Turn the heater fan on by means of
the switch (3) and direct the air flow
by means of air distributors (4).
4. The flow of fresh air delivered to
the cab can be controlled by opening
the recirculation flaps (2).
To drain the cooling fluid from the
heating system, the drain plugs (5)
are provided on the right and left
sides of the cab. After draining the
cooling fluid, it is necessary to blow
out the system, having closed prelimi-
nary the valve on the cylinder block
and unscrewed the plugs (5). After
blowing-out, tighten the plugs.
NOTE: The valve shall be closed to op-
erate the system in the ventilation mode
during warm season.
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