MTZ 1220.1, Operator'S Manual

Page: 54 / 244

MTZ 1220.1/1220.3 Section D. Construction and Operation
D6
The Engine Cooling System (Fig. Д -6) is
of a closed liquid-type with forced circula-
tion of the fluid from the centrifugal pump.
The water pump is rotated with V-belt
fromt the crankshaft pulley. The lubricant
Lithol-24 is put to the bearing hole of the
pump during the montage. The lubrication
of the bearings during the operation is not
needed.
The coolant temperature is monitored by
means of the remote temperature indica-
tor, which is installed to the cylinder head.
Further, the sensor of the emergency coo-
lant temperature light is installed in the
thermostat cover.
The operation of the diesel engine is
forbidden when the emergency coolant
temperature light in the cooling system
flashes. The coolant temperature in the
cooling system is to be maintained within
the range 85º
С …95º С . The thermostat
with opening temperature of the main
valve 87±2 °
С serves for fast heating of
the diesel engine after start and automatic
temperature regulation at various loads
and ambient temperatures.
Fig. D-6
Engine cooling system diagram
:
1- water pump; 2 thermostat; 3 – water-pump drive belt ; 4 – fan; 5 – cooling jacket of cylinder head; 6 –
cooling jacket of cylinder block; 7 – cylinder block sleeve; 8 –coolant drain tap; 9 – branch pipe; 10 – filler
neck plug;
11 – a coolant temperature warning lamp; 12 - engine coolant temperature indicator; 13 – cooler;
14 – oil filter; 15 – oil-to-fluid heat exchanger ;16 – coolant drain plug; 17 – coolant drain branch pipe; 18 –
coolant inlet branch pipe.