Engine
SHOP MANUAL
Ch 1 page 181
Circulation
From the pump, the coolant is carried into the cyl¬inder block’s longitudinal distribution ducting and then
through holes in the cylinder block, washes round the cylinder liners and flows up to the cylinder heads.
The coolant is also forced directly up into the cyl¬inder heads from the distribution ducting via pas-sages which
leads to the injectors and exhaust valves.
From the engine’s rear cylinder head the coolant flows forward through the pipe directly into the thermostat
housing, which is located on the left-hand side of the radiator shield.
The by pass in the thermostat housing forwards the coolant which is under the temperature limit for the ther-
mostat, back to the engine through the transmission cooler. The coolant which needs to be cooled, are going
through the open thermostat and to the radiator cooler system, through the transmission cooler and back to the
engine, where the coolant pump is circulating the coolant in the system.
The cab heater takes the heat coolant from the pipe line on the backside of the engine, and after heating the
cab, the returned coolant is going to the right-hand side of the engine where the coolant pump is located.
The turbo sucks air through a filter and then pushes the charge air through the charge air cooler. The hot
charge air, on the inside of the CAC, is cooled by the cooling air - going through the CAC on the outside. The
cooling air on the outside is sucked through all the coolers (in the cooling package) by a hydraulic fan. The
pressure of the air, in the air charge system, to the cylinders is approx 1 - 2 bar (gauge), depend on the en-
gine’s rpm.
AC condenser
Charge air
cooler
Engine
cooler
Thermostat
housing
Brake oil
cooler
Expansion
tank
AC dryer
filter
Figure 358
Figure 357
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