Instruction manual

PROFICIENCY IN SURVIVAL CRAFT AND RESCUE BOATS OTHER THAN
FAST RESCUE BOATS
8 4
8.2 Cooling system
The cooling system of the engine set is of forced circulative watercooling
close type, which consists of lube oil radiator, water tanker, water pump, rubber
pipe etc.
The cooling system of the engine is closed water cooling system.
The cooling liquid comes from the keel cooler through the lube oil cooler
and water pump to the engine block, cylinder head, water cooling exhaust pipe
and outlet then feed back to keel cooler to make circulation cooling.
Too high cooling temperature will cause the lamp in the control panel to light
up and acoustic alarm to function.
Water temperature …………..75~95C.
Antifreeze concentration of 40% should be used as an all year round
coolant. This concentration will give low temperature protection down to -25C.
Additionally, 40% concentration will protect the cooling system from corrosion.
Warning: Antifreeze contains Glycol and other constituents which are toxic
if taken internally, and can be absorbed in toxic amounts under prolonged skin
contact.
If antifreeze is swallowed accidentally, medical advice should be sought
immediately.
Nearly all diesel engines rely on a liquid cooling system to transfer waste
heat out of the block and internals. The cooling system consist of a closed loop
similar to that of a car engine and contains the following major components:
water pump, radiator or heat exchanger, water jacket (which consist of coolant
passage in the block and heads) and a thermostat.
1.Cooling water pump 2.Lube cooler 3. Keel cooler 4.Lube oil pump 5.Lube oil filter 6.Pressure
control valve 7.Main bearing 8.Camshaft bearing 9.Rocker arm 10 Overflow pipe11. Fuel oil filter
12.Fuel feed pump 13. Fuel injection pump 14. Fuel high pressure pipe 15. Fuel injection nozzle
16. Water exhaust pipe 17. Fuel oil inlet
Fig.8.4 Piping layout