24. SERVICE PROCEDURE 24.1 INITIAL 250 HOURS SERVICE Carry out the following maintenance only after the first 250 hours. REPLACE FUEL FILTER CARTRIDGE CHANGE OIL IN ENGINE OIL PAN, REPLACE ENGINE OIL FILTER CARTRIDGE AND BYPASS FILTER CARTRIDGE (ONLY FOR MA- CHINES EQUIPPED WITH BYPASS FILTER) CHECK ENGINE VALVE CLEARANCE, ADJUST For details of the method of replacing or maintaining, see the section on EVERY 500 HOURS and 2000 HOURS SERVICE. 3-23