. MAINTENANCE MAINTENANCE PROCEDURE REPLACE FUEL FILTER CARTRIDGE WARNING with sealing surface, then tighten approx. 2/3 turn. Air Bleeding 1. Fill the fuel tank. 2. Loosen air bleed plug (1) and joint bolt (2). 3. Loosen knob of feed pump (3), pump it up and down, and continue to make the fuel overflow until no more bubbles come out from joint bolt (2). 4. Tighten joint bolt (2) and air bleed plug (1). REMARK When the machine has run out of fuel, carry out the same procedure, to bleed the air. 4 - 61 EVERY 500 HOURS Maintenance for every 50 , 100 and 250 hours service shoul d be c arried out at the same ti The engine is at high temp erature immediately after the machine has b een operated.
Wait for the e ngine to cool down before replacing the filter. near the fuel. Do not bring fire or sparks Prepare a filter wrench for fuel filter element. ath the filter cartridge. Prepare for cloth. 1. Spread the cloth bene 2. Using a filter wrench, to remove it. 3. Clean the filter holder. Coat the packing surf cartridge into the filter 4. When installing, screw 1. Spread the cloth bene 2. Using a filter wrench, turn filter cartridge (1) counterclockwise Fill a new filter cartridge with clea n fuel. ace with engine oil. Then install th e new holder.
in cartridge until seal comes in contact NOTICE If the filter cartridge is tighten ed excessively, the packing will be da maged and fuel will leak. If the filter cartridge is too loose, fuel will also lea k from the packing, so always tighte n to the correct amount. 5. After replacing the fue l filter element, bleed air. edure, see "Air Bleeding (PAGE 4-61)". For details of the proc edure, see "Air Bleeding (PAGE 4 -61)". 6. After replacement of th e filter cartridge, start the engine a nd check it for possible oil see page from the filter seal.
If oil leaks, check the cartridge again in the whether some foreign If any of the cases is n filter cartridge tightening condition and r etighten it. Should oil sti ll leak, remove the filter sequence of Item 1 and 2 above, and check the packing surface for any damage or material has got caught. oticed, replace the packing with ne w on e and repeat the steps in Item 3 through 6 above.