SUNWARD SWE150F, Operation & Maintenance Manual

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4.5.2.4 Replace fuel primary filter
Warning
1) Place a container under filter to
collect oil.
2) Use filter wrench to remove filter by
rotating filter ① clockwise .
3) Clean up filter bracket, use clean fuel
to rinse new filter and apply engine oil
to contact surface. Then position it to
filter bracket.
4) During installation, fasten until
sealing surface contacts with the
sealing surface of filter bracket. Then
fasten 1/2 more turns.
Fastening too much may cause damages to
contact surface and leading to signs of oil
leakage.
If fastening too loose, fuel may leak from
contact surface. Therefore it must be tighten
appropriately.
Note:
With filter replaced, it ’ s
necessary to bleed air from fuel system.
Bleed air from fuel system
1) Loosen air bleeding plug.
2) Loosen oil pump button, press on it
repeatedly until fuel oil overflows from air
bleeding plug.
3) Fasten oil pump button and air bleeding plug.
4) Start engine to check filter sealing surface for
leaks.