.
MAINTENANCE
MAINTENANCE PROCEDURE
8. When installing, apply oil to the packing surface and bring the packing surface into contact with the seal surface
of filter cartridge (4) and then tighten it further by 1/4 - 1/2 turns.
If the transparent cap is tightened too much, the O-ring will be damaged and this will cause leakage of fuel; if it
is not tightened enough, fuel will leak through the gap at the O-ring. To prevent these problems, always tighten
securely to the fixed tightening angle.
9.
Clean the filter holder, fill the new filter cartridge with clean fuel, coat the packing surface thinly with oil, then
install to the filter holder.
NOTICE
When adding fuel, do not remove cap (B). Always add fuel from the 8
small holes (A) on the dirty side.
After adding fuel, remove cap (B) and install the fuel filter.
Always fill with clean fuel. Be careful not to let any dirt or dust get into
the fuel. In particular, center portion is the clean side, so do not remove
cap (B) when adding fuel. Be careful not to let dirt or dust get into center
portion on the clean side.
10. When installing, tighten until the packing surface contacts the seal surface of the filter holder, then tighten it 3/4
of a turn.
If the filter cartridge is tightened too far, the packing will be damaged and this will lead to leakage of fuel. If the
filter cartridge is too loose, fuel will also leak from the packing, so always tighten the correct amount.
When tightening with a filter wrench, be extremely careful not to dent or damage the filter.
11.
Check that the drain valve (2) is tightened securely.
12.
Set valve (1) at the side of the fuel pre-filter cartridge to the open position (O).
13.
After completing the replacement of filter cartridge (4), bleed the air.
Bleed the air as follows:
14.
Fill the fuel tank with fuel (to the position where the float is at the highest position).
15. Loosen the knob of feed pump (6), pull it out, then pump it in and out until the movement becomes heavy.
REMARK
It is not necessary to remove the plug at the top of the fuel pre-filter and fuel main filter.
After the engine runs out of fuel, use the same procedure to operate feed pump (6) and bleed the air.
16. After finishing to bleed air, push in the knob of feed pump (6) and tighten it.
17.
After replacing the filter cartridge, start the engine and run it at low idling for 10 minutes.
Check for leakage of oil from the filter seal surface and tranparent cap mounting. If any oil is leaking, check the
tightening of the filter cartridge.
If there is still oil leakage, repeat Steps 2 - 6 to remove the filter cartridge, and if any damage or embedded
foreign material in the packing surface is found, replace it with a new cartridge and repeat Steps 7 - 17 to install
it.
4 - 60
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