Belarus 1523, Operating Manual

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BELARUS-1523/1523 В /1523.3 /1523В.3 Construction and Operation
166
SYSTEM OF VENTILATION AND HEATING OF THE CAB
The cab ventilation and heating system
consists of a fan with motor and radiator
as well as four air cleaning filters. The
fan and radiator are installed on the cab
roof.
To ensure the effective performance of
the ventilation and heating system, keep
closely to the following recommenda-
tions:
1. After filling the cooling system with
coolant (water), start the engine and,
without opening the tap (1) located on
the left-hand side of the engine, let the
engine run at medium speed to warm-
up the coolant in the system to about
50-60°C, then open the valve to prime
the heater radiator.
2. Make sure that the fluid is circulating
freely through the heater; to do this,
open the drain plug (4) on the right-
side of the cab. The heater radiator
shall begin warming up; therewith, the
level of coolant in the engine radiator
shall drop.
3. Top up the water radiator with coolant
to the level of the upper filler neck.
4. To speed up the warming-up of the
cab, set the heater fan switch (3) to
the ON position, and open the air-
recirculation shutters (2).
5. To drain coolant from the heater and
the engine cooling system, drive the
tractor onto a level ground, open the
heater tap (1), remove the engine ra-
diator cap, the right- and left-hand
drain plugs (4) and open drain taps on
the water radiator and the engine cyl-
inder block.
6. In the warm season, the tap (1) shall
be closed for providing the operation
of the system in the ventilation mode.
1 – tap
2 – air-recirculation shutters
3 – heater switch
4 – draining plug
ATTENTION!
To avoid formation of ice
plugs in cold season, blow down the
heating system with compressed air by
closing preliminarily the water drain
taps on the engine radiator and the cyl-
inder block, with the radiator filler cap
refitted.