. MAINTENANCE SERVICE PROCEDURE MAINTENANCE SERVICE PROCEDURE NOTICE entering the inside of the filter 4 - 67 6. Remove f ilter cart ridge cap (A ) and install to the f ilter holder Do n ot fil l the fi lter cartri dge with fuel. Cap (A) i cartridge. 7. Whe n installing, ti ghten until th e packin g surface contacts th e seal surf ace of th e filter holder, the n tighten it 3/4 of a turn. If the filter cartridg e is tightene d too far, the packing w ill be d amaged a nd this w ill lead to leakag e of f uel. If the filter cartridge is to o loose, fue l will also leak from the packin g, so alw ays tighte n the correct amount. 8. Ope n fue l valve (1 ) on the fue l tank 9.
Afte r completing th e replacem ent of fuel filter cartridge (2), ble ed the air from the circuit. Fo r details , see "BLEED AIR FRO M FUEL CIRCUIT (P AGE 4-38)". 10. Afte r replacing the filter cartrid ge, start t he e ngine and check that ther e is no lea kage of f uel from the filter seal surface. I f any lea kage of fuel is found, chec k tha t the filter c artridge is tightene d properly . If the fuel still l eaks, repe at Steps 1 - 3 to remove t he filter c artridge, t hen check t he packin g surface for damage or e mbedded dirt. If an y problem is fo und, replac e the cartridge with a ne w part, then repe at Steps 4 - 8 to install the new cartridge.