SUNWARD SWE50B, Operation & Maintenance Manual

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70
-15°C
（
5°F
）
. it’s necessary to use the fuel that is suitable from the temperature.

To prevent humidity in air to condense in fuel tank to form water, top up oil tank after the work is
finished everyday.

Before starting the engine, or when 10 minutes have passed after adding fuel, drain the sediment and
water from the fuel tank.

If there runs out of fuel, or if the filters have been replaced, it is necessary to bleed the air from the
circuit.
5.2.3 Coolant in Cooling System

River water contains large amount of calcium and other impurities, so if it is used, scale will stick to the
engine and radiator, and this will cause defective heat exchange and overheating.

When using antifreeze, always observe the precautions given in the Operation and Maintenance Manual.

Antifreeze is flammable, so be extremely careful not to expose it to flame or fire.

The proportion of anti-freeze to water differs according to the ambient temperature.
For details of the mixing proportions.

If engine is overheating, before adding coolant, wait for the engine to cool down.

If the coolant level is low, it will cause overheating and will also cause problems with corrosion from
the air in the coolant.
5.2.4 Grease

Grease is used to prevent twisting and noise at the joints.

If any part becomes stiff after being used for long time, add grease.

Always wipe off all of the old grease that is pushed out when greasing. Be particularly careful to wipe
off the old grease in places where sand or dirt sticking in the grease would cause wear of the rotating
parts.
5.2.5 Oil and Fuel Storage

Keep indoors preventing any water, dirt, or other impurities from getting in. if drums have to be stored
outside, cover them with a waterproof sheet or take other measures to protect them.

When keeping drum cans for a long period, put the drum on its side so that the filler port of the drums is