DEUTZ-FAHR FL35-70HP Series, Operation Manual

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①
Cover of radiator
②
Water tank of radiator
③
Water drain valve
Cleaning of incrustation of cooling system
Before maintenance, solution containing 750g caustic soda
and 150g kerosene in every 10L water will be filled in the
cooling system. The engine will be operated at
intermediate speed for 5 min to 10min, solution will be
stayed for 10h to 12h (attention: thermal insulation
measures must be adopted in the winter to prevent
freezing), then, the engine will be re-started for operating
at intermediate speed for 20 min, and stopped for
discharging cleanout fluid.
After the engine has been cooled, water pipe will be
inserted into water tank
②
for flushing and water drain
valve
③
in the bottom of the water tank shall be opened.
The water drain valve will be closed after cleaning. In
addition, water will be added to make engine operate for
several minutes, and then water will be discharged. After
the engine has been cooled, new anti-freezing solution or
cooling water will be added in accordance with provisions.
Fig. 8-54
8.10.2.Cooling system of the engine that has used anti-freezing solution
Effective period of anti-freezing solution is 2 years or 1600 h. if it exceeds this period, it shall be replaced and
cooling system shall be flushed. Then, new anti-freezing solution will be added.
Warning:
Please abide by rules for environmental protection. Any fluid (petroleum, diesel and cooling liquid)
or filter and battery must be discarded in accordance with applicable laws and regulations.
Steps for replacing cooling liquid and cleaning circuit