Hokuetsu AIRMAN PDS185S-6EZ1 Instruction Manual page 19

3.2.3 Coolant
Use coolant that is a mixture of LLC (antifreeze) and soft water of good quality such as tap water.

If you use water mixed with soil, sand, or dust, or soft water such as well water (ground water), water
will easily accumulate in the coolant channels of the engine and radiator, leading to an increase in the
coolant temperature.

Freezing the coolant can damage the engine and radiator. Adjust the LLC (antifreeze) mixing ratio
within the range of 30-60% depending on the outside temperature. If the mixing ratio exceeds 60%, the
antifreeze effect will decrease. At the time of factory shipment, coolant with a mixing ratio of 55% is
filled.
Outside temperature (°F)
Outside temperature (°C)
Mixing ratio (%)

Use LLC (antifreeze) which conforms to one of such standards : SAE J814, SAE J1034 and ASTEM
D3306.

Follow the designated regulations to dispose of LLC (antifreeze).
3.2.4 Fuel

Diesel fuel is required to meet the following characteristics:
Free from even fine dust particulate

Appropriate viscosity grade

It must have high cetane number. (greater than 45)

It must have high fluidity even at low temperature.

Carbon residue content in fuel must be a little.


Do not use such diesel fuel having higher sulfur content above 0.0015%(15 ppm)

Use ultra-low sulfur diesel fuel only for diesel engine.

Use such diesel fuel which conforms to either EN590 or ASTM D975 standard.

Do not use kerosene. And never use fuel mixed with kerosene.

Follow the designated regulations to dispose of fuel.
3. Operation
Mixing ratio of LLC (antifreeze) (reference)
5 -4
-15 -20
30 35
3-3
-13 -22 -31
-25 -30 -35
40 45 50
-40 -49
-40 -45
55 60