Maintenance Inspection Schedule

Pretrip Every 1,500 Hours Every 3,000 Hours* As Needed Inspect/Service These Items
    Microprocessor:
•       Run Pretrip Test (see Performing a Pretrip Test).
    Engine:
•       Check fuel supply.
•       Check engine oil level.
• • •   Listen for unusual noises, vibrations, etc.
• • •   Inspect belts for condition and proper tension.
• • •   Check engine oil pressure hot, on high speed (should display OK).
• • •   Check engine coolant level and antifreeze protection (-30 F [-40 C]).
• • •   Drain water from the Primary fuel filter bowl.
  • •   Drain water from fuel tank and check vent.
  • •   Inspect/clean electric fuel pump filter.
    •   Check engine mounts for wear.
    •   Replace EMI 3000 air cleaner element (see EMI 3000 Air Cleaner) at 3,000 hours or two years (whichever occurs first). See note.
    •   Replace EMI 3000 fuel filter/water separator. See note.
    •   Replace Secondary EMI 3000 fuel filter, see note.
    •   Change engine oil and oil filter (hot). Requires oil with API Classification CJ-4 or CK-4. See Note*.

NOTE: For high biodiesel use (B20) the engine oil and filter should be changed every 1500 hours.
      •

TK488CR1, TK488CRH1, TK488CRG1 Engines Before 2024 Engine Model Year (MY) Only:

Inspect and clean the EGR system, as necessary. No scheduled EGR system maintenance is required, >5000 hours or as needed. Alarm Code 570 will display when the EGR system needs cleaning. If cleaning is not completed when Code 570 is active, eventually, the EGR Valve deposit accumulation limit will be reached, and an EGR Valve Alarm Code 618 (P148A) will be set, and the engine operation will be limited to default running mode, low-speed and 75% max-available torque, only. Alarm Code 618 means that the accumulated deposit amount has exceeded the allowable limit. If Code 618 occurs on an engine with less than 5,000 total engine hours, clean the EGR Valve and Cooler as necessary to eliminate the alarm code.

See Service Bulletin SB894 on e-Tech Library for detailed EGR system maintenance interval information. SB894 EGR Maintenance Interval Update – Yanmar Common Rail Diesel Engines
    •  

TK488CRX1, TK488CRG1, TK488CRH1, TK488CR1 Engines Built 2024 and After Engine Model Year (MY) Only:

Inspect and clean the EGR system as necessary according to the maintenance schedule, 3000 hours. Alarm Code 570 will display when the EGR system needs cleaning. If cleaning is not completed when Code 570 is active, eventually, the EGR Valve deposit accumulation limit will be reached, and an EGR Valve Alarm Code 618 (P148A) will be set. When alarm code 618 is active, the engine operation will be in default running mode and be limited to low-speed and 75% maximum-available-torque only. If an EGR valve alarm code (618/ P148A) occurs on an engine with less than 3,000 total engine hours, clean the EGR valve and cooler as necessary to eliminate the alarm code.

See Service Bulletin SB894 on e-Tech Library for detailed EGR system maintenance interval information. SB894 EGR Maintenance Interval Update – Yanmar Common Rail Diesel Engines
    •   Adjust engine valve clearance.
        Change ELC (red) engine coolant every 5 years or 12,000 hours. Units equipped with ELC have an ELC nameplate on the expansion tank (see Engine Cooling System).
    Electrical:
  • •   Inspect battery terminals and electrolyte level.
  • •   Inspect wire harness for damaged wires or connections.
  • •   Inspect AC generator wire connections for tightness.
         
    Structural:
• • •   Visually inspect unit for fluid leaks.
• • •   Visually inspect unit for damaged, loose, or broken parts.
  • •   Clean entire unit including radiator coil.
  • •   Check all unit and fuel tank mounting bolts, brackets, lines, hoses, etc.

*3000 hours or one year, whichever occurs first.