3500C Marine Propulsion Engines Caterpillar

Before performing any operation or maintenance procedures, ensure that the Safety Information , warnings, and instructions are read and understood.

To determine the maintenance intervals, use fuel consumption, service hours or calendar time, which ever occurs first. Experience has shown that maintenance intervals are most accurately scheduled on the basis of fuel consumption. For information on service hours and fuel consumption, see this Operation and Maintenance Manual , "Maintenance Recommendations" topic (Maintenance Section ).

Before each consecutive interval is performed, all of the maintenance requirements from the previous interval must be performed.

Note: For engines that have a shallow oil sump, change the engine oil and oil filters after 250 hours of operation. For engines that have a standard oil sump, change the engine oil and oil filters after 500 hours of operation.

When Required

Closed Crankcase Ventilation (CCV) Fumes Disposal Filter - Replace
Engine Air Cleaner Element (Dual Element) - Clean/Replace
Engine Air Cleaner Element (Single Element) - Clean/Replace
Fuel System - Prime

Daily

Air Starting Motor Lubricator Oil Level - Check
Air Tank Moisture and Sediment - Drain
Cooling System Coolant Level - Check
Engine Air Cleaner Service Indicator - Inspect
Engine Oil Filter Differential Pressure - Check
Engine Oil Level - Check
Fuel System Fuel Filter Differential Pressure - Check
Fuel System Primary Filter/Water Separator - Drain
Fuel Tank Water and Sediment - Drain
Instrument Panel - Inspect
Marine Transmission Oil Level - Check
Walk-Around Inspection

Initial 250 Service Hours

Engine Valve Lash - Inspect/Adjust
Fuel Injector - Inspect/Adjust
Speed Sensor - Clean/Inspect

Every 250 Service Hours

Belts - Inspect/Adjust/Replace
Cooling System Coolant Sample (Level 1) - Obtain
Cooling System Supplemental Coolant Additive (SCA) - Test/Add
Engine Oil Sample - Obtain
Engine Oil and Filter - Change
Engine Valve Lash - Inspect/Adjust
Hoses and Clamps - Inspect/Replace

Initial 500 Hours (for New Systems, Refilled Systems, and Converted Systems)

Cooling System Coolant Sample (Level 2) - Obtain

Every 500 Service Hours

Air Shutoff - Test
Engine Oil and Filter - Change

Every 1000 Service Hours

Engine - Clean
Engine Crankcase Breather - Clean
Engine Oil and Filter - Change
Engine Protective Devices - Check
Fuel System Primary Filter - Clean/Inspect/Replace
Fuel System Secondary Filter - Replace

Every 2000 Service Hours

Air Starting Motor Lubricator Bowl - Clean
Crankshaft Vibration Damper - Inspect
Engine Mounts - Check
Turbocharger - Inspect

Every Year

Cooling System Coolant Sample (Level 2) - Obtain

Every 3000 Service Hours or 3 Years

Cooling System Coolant (DEAC) - Change
Cooling System Coolant Extender (ELC) - Add

Every 4000 Service Hours

Auxiliary Water Pump - Inspect
Engine Valve Lash - Inspect/Adjust
Fuel Injector - Inspect/Adjust

Every 6000 Service Hours

Air Shutoff Damper - Remove/Check
Cooling System Water Temperature Regulator - Replace

Every 6000 Service Hours or 6 Years

Prelube Pump - Inspect
Speed Sensor - Clean/Inspect
Starting Motor - Inspect
Water Pump - Inspect

Every 12 000 Service Hours or 6 Years

Cooling System Coolant (ELC) - Change

Overhaul

Aftercooler Core - Inspect/Clean
Maintenance Recommendations
Overhaul (Major)
Overhaul (Top End)
Overhaul Considerations