MMD Equipment 400S-6B1 - Manual (Page 50)

5. Periodic Inspection/Maintenance
5-11
5.5.12 Change fuel pre-filter
[Every 500 hours]
<Procedure>
① Put a container under filter cartridge “1” to
receiver drained fuel.
② Using a filter wrench,turn transparent cap
“
2” to the left to remove it(This cap is used
again.)
③ Using a filter wrench,turn filter cartridge“1”
counterclockwise to remove it.
④ Remove seal“3” from transparent cap“2”,then
clean the cap.If transparent cap“2”is
damaged,replace it with a new part. (See.5.4)
⑤ Coat new seal“3” with clean fuel or oil,then
install it to transparent cap“2”.
⑥ Install transparent cap “2”to new filter
cartridge“1”.
⑦ Tighten drain valve“4”under transparent cap
“
2”securely.
⑧ Clean the filter head,fill the new filter the new
filter cartridge“1”with clean fuel,coat the
packing surface thinly with oil,then install to
the filter head.
⑨
When installing,bring the packing surface into contact
with the seal surface of the filter head,then tighten a
further 3/4 turns.If the filter cartridge is tightened too
far,it will damage the packind and cause leakage of
fuel. If the filter cartridge“1”is not tighten
enough,there will be leakage of fuel through the
gap.To prevent these problems,always tighten securely
to the specified tightening angle.
⑩ After replacing the filter cartridge,start the engine and
run it at low idle for 10 minutes.
Check for leakage of fuel from the filter seal surface.
If any fuel is leaking,check the tightening
of the filter cartridge“1”.If there is still leakage of
fuel,repeat Steps ①-③ to remove the filter
cartridge“1”.If any damage or embedded foreign
material is found in the packing surface,replace
the filter cartridge“1”. with a new part and repeat the
procedure in Steps ④-⑩.
For details, refer to engine operation manual.
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
side,so do not remove cap(B) when adding fuel.Be careful not let dirt or dust get into center portion
on the clean side.
A080103
1
3
2
4
A080104
A B
1
2