Hokuetsu AIRMAN PDS185S-6EZ1 Instruction Manual page 42

5. Periodic Inspection/Maintenance
5.5.2 Change engine oil filter cartridge
At 50 hours for the first change and at every 250 hours thereafter
B
A
5.5.3 Check battery electrolyte and specific gravity of battery electrolyte
Battery electrolyte: every 250 hours
Specific gravity of battery electrolyte: every 500 hours
If there is an engine starting issue due to battery discharge, follow the procedure below:

Ordinary type battery:
Check the amount of battery fluid and if it is not within specification, add distilled water.
Measure specific gravity of battery electrolyte, and if it shows below 1.24, recharge the battery
immediately.
(See 5.5.4)

Enclosed type battery:
Check the indicator on top of the battery.
If the indicator shows that charge is needed, recharge the battery immediately.
If specific gravity of battery electrolyte does not rise in spite of replenishing distilled water or
charging battery, be sure to replace battery with new one quickly.
<Procedures>
1. Remove the oil filter cartridge [A], using a filter
wrench.
2. Screw in the new oil filter cartridge [A] with the
packing [B] coated slightly with oil.
(For part number, See 5.4)
3. After the packing touches the sealing face, tighten
another 1 times with a filter wrench.
4. After installing the oil filter cartridge, check it for
any leak during operation.
H000049
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