Hokuetsu AIRMAN PDS185S-6EZ1 Instruction Manual page 50

5. Periodic Inspection/Maintenance
5.5.17 Change coolant
1,000 hours or every 2 years
Be sure to stop the engine and let the coolant water sufficiently cool down before changing it.
<Procedures>
1. Remove the inlet cover [A], the radiator cap [B] on the top of the radiator, and the drain plug [C]
outside the machine. Next, open the drain valve [D] to drain the coolant.
2. Be sure to also open the drain plug [E] on the engine cylinder block for drainage.
3. Drain the coolant in the reserve tank [F] .
4. After the drainage of the coolant is completed, close drain valve [D] and drain plug [C], and then
fasten drain valve [E] on the engine side. Replenish coolant so that it reaches the opening of the
radiator inlet. Do not forget to pour in cooling water up to the MAX level of the reserve tank [F] .
5. After refilling coolant, securely attach the radiator cap [B] and the reserve tank [F] cap and
operate the machine for about 5 minutes with no load.
6. Stop the machine, wait until the coolant has cooled down, and then check the coolant level.
7. If the coolant level is too low, replenish the coolant.
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Refer to section 3.3.2 for reserve tank capacity details.
Caution when changing coolant
H990432
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Follow the designated regulations to dispose of LLC (antifreeze).
F
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When removing the radiator cap, lightly turn it and release the internal
pressure without completely opening it once the first stage lock is released.
After confirming that the internal pressure has been released, turn it while
pushing in until the second stage lock is released. If this procedure is
neglected, its inner pressure can blow off the radiator cap, and steam jetting
out of the radiator may cause scalding burns.

LLC (antifreeze) is a toxic.
In case of accidental ingestion, do not force vomiting and seek medical

attention immediately.
In case of contact with eyes, rinse with plenty of water and seek medical

attention.
When storing LLC (antifreeze), label it as LLC (antifreeze), seal it, and keep

it out of reach of children.
Beware of flames.
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A B
5-15
E
D
C
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