Ensure that all safety information, warnings, and instructions are read and understood before any operation or any maintenance procedures are performed.

The user is responsible for the performance of maintenance, including all adjustments, the use of proper lubricants, fluids, and filters. The user is also responsible for the replacement of components due to normal wear and aging. Failure to adhere to proper maintenance intervals and procedures may result in diminished performance of the product and/or accelerated wear of components.

Use mileage, fuel consumption, service hours, or calendar time, WHICH EVER OCCURS FIRST, to determine the maintenance intervals. Products that operate in severe operating conditions may require more frequent maintenance. Before each consecutive interval is performed, all maintenance from the previous interval must be performed.

Note: The engine oil and filter change interval depend on several factors including oil sump capacity. Refer to the engine oil and filter change section for specific interval information.

Daily

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Walk-Around Inspection - Inspect engine for leaks and loose connections
Engine Crankcase - Check oil level
Cooling System - Check coolant level
Marine Gear - Check oil level
Air Starting Motor (If Equipped) - Check motor oiler level
Air Cleaner Indicator - Check
Clutch Shift Collar (If Equipped) - Lubricate
Raw Water Pump - Check strainer and prime

Every 1900 L (500 gal) of Fuel or 50 Hours

Zinc Rods - Inspect/Replace
Marine Gear Oil and Filter - Change on new or rebuilt marine gears at first 50 hours ONLY, then at Every 2000 Hours thereafter)
Air Tank - Drain water/sediment

Every 4750 L (1250 gal) of Fuel or 125 Hours

Clutch Shift Collar and Bearing and Shift Lever - Lubricate/Check/Adjust

Every 9500 L (2500 gal) of Fuel or 250 Hours

Scheduled Oil Sampling (S·O·S) - Obtain
Engine Oil and Filters - Replace
Fuel System - Drain water & sediment from tank; Replace final filter/Clean primary filter
Cooling System - Test for coolant additive concentration; Add liquid coolant additive or replace coolant additive maintenance element (if equipped)
Crankcase Breather - Clean
Batteries - Clean/Inspect and check electrolyte level
Belts, Hoses and Clamps - Inspect/Check
Engine Air Cleaners - Clean
Valve Lash (At First Oil Change Only) - Check/Adjust

PM Kit	Part Number	Description	Q.ty
Every 250 Service Hours	1R-0716	Oil Filter	1	Order Now
	3E-9848	CAT DEO15W40-20L	2
	1R-0749	Fuel Filter	1
	217-0616	SCA Coolant	1

Every 38 000 L (10,000 gal) of Fuel or 1000 Hours

Marine Gear - Replace oil and filter, Clean strainer/breather, Lubricate output shaft seal
Governor - Inspect/Lubricate linkage; Check/Adjust fuel ratio control and low idle
Engine Protective Devices - Inspect/Check

PM Kit	Part Number	Description	Q.ty
Every 1000 Service Hours	4N-7808	Filter Soot	1	Order Now

Every 114 000 L (30,000 gal) of Fuel or 3000 Hours

Engine Valve Lash - Check/Adjust, Inspect valve rotators
Cooling System - Clean/Flush/Change coolant and replace thermostat
Engine Mounts and Crankshaft Vibration Damper - Inspect/Check
PAR Analysis - Obtain

PM Kit	Part Number	Description	Q.ty
Every 3000 Service Hours	9L-6643	Belt	1	Order Now
	248-5513	Regulator Water	2
	4N-3858	Gasket Regulator	1
	3S-9643	Seal Regulator	2
	4N-0015	Air Filter Element	1
	217-0617	SCA Coolant	1

Every 190 000 L (50,000 gal) of Fuel or 5000 Hours

Fuel Injection Nozzles - Test/Exchange
Turbocharger, Jacket Water Pump and Raw Water Pump - Inspect/Rebuild or Exchange
Alternator, Air Compressor and Starting Motors - Inspect/Rebuild or Exchange if necessary
Rod Bearings - Inspect/Replace

OVERHAUL Every 380 000 L (100,000 gal) of Fuel or 10,000 Hours

Cylinder Head, Connecting Rods, Pistons, Cylinder Liners, Turbocharger, Oil Pump, Spacer Plate, Fuel Ratio Control, Cam Followers, Fuel Transfer Pump and Timing Advance - Inspect/Rebuild or Exchange
Piston Rings, Main Bearings, Rod Bearings, Valve Rotators and Crankshaft Seals - Replace
Fuel Injection Nozzles - Test
Fuel Injection Pump - Test
Crankshaft, Camshaft, Cam Bearings, Damper, Governor, Fuel Pump Camshaft and Fuel Rack - Inspect
Oil Cooler - Clean/Test
Aftercooler Core - Clean/Test
Coolant Analysis - Obtain

Contact Phu Thai Cat at Hotline 1800 599 990 for 24/7 product support services!

Cat 3406 Marine Engine (4TB) - Maintenance Interval Schedule

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Cat 3406 Marine Engine (4TB) - Maintenance Interval Schedule

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