Caterpillar Industrial Engines 3406

The need for preventive maintenance

The quality of the fuel that is being used

The results of the S·O·S analysis

Oil Consumption as an Overhaul Indicator

Oil consumption rate (brake specific oil consumption)

Engine Protective Devices - Check

Alarms and shutoffs functioning properly?

NOTICE: During testing, abnormal operating conditions must be simulated. The tests must be performed correctly in order to prevent possible damage to the engine. To prevent damage to the engine, only authorized service personnel or your Caterpillar dealer should perform the tests.

Visual Inspection: Condition of all gauges, sensors and wiring

Fuel Control Linkage - Check/Lubricate

WARNING: Fuel leaked or spilled onto hot surfaces or electrical components can cause a fire.

NOTICE: Do not allow dirt to enter the fuel system. Thoroughly clean the area around a fuel system component that will be disconnected. Fit a suitable cover over disconnected fuel system component.

Fuel Injection nozzles cleaned, inspected, tested, and replaced, if necessary

NOTICE: Never wire brush or scrape a fuel injection nozzle. Wire brushing or scraping a fuel injection nozzle will damage the finely machine orifice. Proper tools for cleaning and testing the fuel injection nozzles can be obtained from Caterpillar dealers.

Air Starting Motor Lubricator Oil Level - Check

Is the fuel supply to the engine OFF?

Air Tank Moisture and Sediment - Drain

Check the battery charger for proper operation. If the batteries are properly charged, the needle of the ammeter will register near “0” (zero).

The battery charger must not produce excessive current during start-up. Alternatively, the charger must be automatically disconnected for start-up. If the engine has an alternator, the charger must be automatically disconnected during start-up and during engine operation.

WARNING: Never disconnect any charging unit circuit or battery circuit cable from the battery when the charging unit is operated. A spark can cause an explosion from the flammable vapor mixture of hydrogen and oxygen that is released from the electrolyte through the battery outlets. Injury to personnel can be the result.

Perform the following procedure to charge the battery:

1. Ensure that the charger is turned OFF.

2. Adjust the voltage of the charger in order to match the voltage of the battery.

Note: Adjust the frequency of cleaning according to the effects of the operating environment.

Inspect the aftercooler for these items: damaged fins, corrosion, dirt, grease, insects, leaves, oil, and other debris. Clean the aftercooler, if necessary.

For air-to-air aftercoolers, use the same methods that are used for cleaning radiators.

Personal injury can result from air pressure.

Personal injury can result without following proper procedure. When using pressure air, wear a protective face shield and protective clothing.

Maximum air pressure at the nozzle must be less than 205 kPa (30 psi) for cleaning purposes.

Pressurized air is the preferred method for removing loose debris. Direct the air in the opposite direction of the fan’s air flow. Hold the nozzle approximately 6 mm (0.25 inch) away from the fins. Slowly move the air nozzle in a direction that is parallel with the tubes. This will remove debris that is between the tubes.

Pressurized water may also be used for cleaning.