12153 2 Mercury PLUG, BOTTOM COWL (ELECTRIC)

Daily
Engine Crankcase - Check oil level Leaks and Loose Connections - Inspect Engine Cooling System - Check coolant level Air Cleaner Indicator (If Equipped) - Check Air-to-Air Aftercooler System - CheckPM Level 1
Every 15,000 Miles (24 000 km) or 2500 gal (9500 L) of Fuel or 250 Hours*
Scheduled Oil Sampling (S O S) - Obtain Engine Oil and Filter(s) (NOTE A) - Replace Fuel Filters - Replace final filter/Clean primary filter (if equipped) Cooling System - Test for coolant additive concentration Crankcase Breather - Clean Alternator, Fan and Accessory Drive Belts - Inspect Hoses and Clamps - Inspect/Replace Air-to-Air Aftercooler System - Inspect/Check Fan Drive Bearing - Lubricate Valve Lash (at First PM 1 Interval Only) - Check/AdjustPM Level 2
Every 200,000 Miles (320 000 km) or 33,300 gal (126 000 L) of Fuel or 3,330 Hours*
Performance Analysis Report (PAR) - Obtain Engine - Steam clean Turbocharger - Inspect/Check Engine Mounts - Inspect/Check Vibration Damper - Inspect/Check Air Compressor - Inspect/Check Thermostat - Replace Cooling System - Clean/Flush Water Pump - Rebuild or Exchange2PM Level 3
Every 300,000 Miles (480 000 km) or 50,000 gal (190 000 L) of Fuel or 5,000 Hours*
Fuel Injection Nozzles - Exchange2 Air Compressor - Rebuild or Exchange2 Turbocharger - Rebuild or Exchange2 Valve Lash - Check/Adjust Rack Position, Timing Position and Throttle Position Sensor Calibration - Check/Adjust Crankshaft Bearings - Inspect/ReplaceOverhaul
Every 600,000 Miles (960 000 km) or 100,000 gal (380 000 L) of Fuel or 10,000 Hours
Overhaul Before Failure (In-Frame Overhaul) Cylinder Head Assembly, Cylinder Packs, Oil Pump and Fuel Transfer Pump - Rebuild or Exchange2 Main and Connecting Rod Bearings - Replace Crankshaft - Inspect Camshaft - Inspect Camshaft Followers - Inspect Damper - Inspect Spacer Plate - Inspect Fuel Pump Camshaft - Inspect Fuel Rack - Inspect Oil Cooler Core - Clean/Test Air-to-Air Aftercooler Core - Clean/Test After Failure Overhaul (Out-of-Frame Overhaul)*First Perform Previous Service Hour ItemsThe distance (odometer) intervals shown on this schedule are based on average fuel rates. This chart assumes 6 mpg (2.5 km/L). Your distance maintenance intervals may need to be adjusted if actual fuel consumption differs from the average fuel consumption Caterpillar considered.Example: Your 3406B rated 350 hp (261 kW) at 1800 rpm is averaging 5.5 mpg (2.3 km/L) due to high load factor operation. The engine consumes 2500 gallons (9500 L) of fuel to travel 13,750 miles (22 000 km). PM Level 1 should be performed at every 13,750 miles (22 000 km) instead of 15,000 miles (24 000 km) shown on the schedule.1Experience has shown that maintenance intervals are most accurately scheduled on the basis of fuel consumed. Rated engine speed and load factor are also important for some components. However, Caterpillar recognizes that the distance (odometer) interval is most commonly used to schedule maintenance for on-highway vehicles. NOTE A: Remote mounted or auxiliary filters require additional oil. A 13 quart (12.3 L) supplemental oil filtration system extends the normal oil and filter change interval to 16,500 miles (26 500 km). When changing oil, overfill crankcase by amount needed for auxiliary system (if equipped).To prevent crankshaft and/or bearing damage, crank engine to fill all filters before starting engine.2Replacement with genuine Caterpillar Remanufactured components offers the best value to truck engine customers.