How to Change the Fuel Filter on an ISC Engine

by Jeff Woodward
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The Cummins Engine Company introduced the ISC Engine family in 1998. The ISC is a medium-range engine used in the transit, motor home and fire apparatus sectors. The ISC is an 8.3-liter engine with a common rail fuel system and a variable actuated turbocharger. Preventative maintenance plays an important role in the engine's longevity; for example, you must change the fuel filter every 15,000 miles or 500 working hours.

Step 1

Loosen the fuel filter from the engine with a filter wrench. The fuel filter is located on the driver's side of the engine toward the center of the block and below the intake manifold. Unscrew the filter from the remaining threads until it separates from the filter head.

Step 2

Lubricate the seal ring on the new fuel filter with motor oil. Fill the fuel filter halfway with diesel fuel. Wipe any spilled fuel from the outside of the filter with a shop towel.

Step 3

Screw the new fuel filter onto the filter head. Only tighten the filter hand-tight. If the filter head has a priming pump attached, prime the filter until it will no longer hold fuel. Start the engine to allow the fuel system to become fully primed.

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