2. Sufficient Clean Fuel

2. Sufficient Clean Fuel

Purpose:

The purpose of this test is to verify the fuel quality.

Sufficient Clean Fuel

^ Check for illumination of the WATER IN FUEL indicator.
^ After verifying that there is fuel in the tank drain a sample from the fuel conditioning module.
^ A cetane rating between 40 and 50 is recommended for optimum performance.






Recommended Procedure:

Open the drain valve on the fuel conditioning module and fill a clear container until it is half full. Close the drain valve.

Observe WATER TN FUEL indicator. If the indicator is illuminated the fuel is probably contaminated with water.

Flow out of the drain should be a steady stream. Insufficient flow could indicate fuel supply or fuel system problems.

Inspect the fuel in the container. It should be clear not cloudy. It also should be free of water and contaminants. Dyed red or blue fuel indicates off-highway fuel.

Some sediment and water may be present in the fuel sample if the fuel filter has not been serviced for a prolonged period of time and/or if the sediment and water have not been drained recently. If that is the case a second sample may be required to determine fuel quality.










Possible Causes:

^ No fuel in the tank
^ Fuel supply line could be broken or crimped
^ Fuel could be gelled (most likely in cold weather with No.2 fuel)
^ Pickup tube screen in tank could be clogged
^ Restricted fuel filters

Cloudy fuel indicates that the fuel may not be a suitable grade for cold temperatures.

Excessive water or contaminants may indicate that the tank and fuel system may need to be flushed and cleaned.

Tools Required:

Clear container approximately O.95L (1-quart)