. MAINTENANCE SERVICE PROCEDURE 4 - 53 4. When installing, tighten unti l the packing surface contacts the seal surface of the filter h older, then tighten it 3/4 of a turn. If the filter cartridge is tighte ned too far, the packing will be d amaged and this will lead to leakage of fuel. If the filter cartridge is too loose, fuel will also leak from the packin g, so always tighten the c When tightening with a fi lter wrench, be extremely careful not to dent or damage th 5. After completing the replac ement of fuel main filter cartridge Bleed the air as follows. Fill the fuel tank with fuel. 6. 7.
After replacing filter cartridg Do not loosen the plug at th e filter stand of the fuel prefilter. If it is loosened, air is not 8. Loosen wing bolt (4) which is fixing lever (5) of priming pum d down to let fuel flow out of a les do not come out any more. ) and then tighten wing bolt (4) o lock lever (5). 9. (3). Move lever (5) up an bleeding plug (2) until bubb Tighten air bleeding plug (2 priming pump (3) securely t 10. After replacing the filter cartridge, start the engine and chec that there is no leakage of fuel from the filter seal surface. there is any leakage of fuel, check the tightening of the filte cartridge.
If there is still leakage of fuel, follow Step 1 and 2 t remove the filter cartridge, then check the packing surface fo damage or foreign material. If any damage or foreign materi is found in the packing, replace the cartridge with a new par then repeat Steps 3 - 10 to install the filter cartridge. After replacing the filter car that there is no leakage of there is any leakage of fue tridge, start the engine and chec fuel from the filter seal surface. l, check the tightening of the filte cartridge. If there is still lea kage of fuel, follow Step 1 and 2 t remove the filter cartridge, t hen check the packing surface fo damage or foreign material .
If any damage or foreign materi is found in the packing, rep lace the cartridge with a new par then repeat Steps 3 - 10 to