FASS Titanium Install Class 8 Part 3

The FASS Titanium series designed for Class 8/Semis is available at Orange County Diesel in Huntington Beach, California. If you have any questions about any other FASS product, or if you need expert assistance installing your FASS Platinum, feel free to call and speak to a FASS service professional at 714-848-2170.

This is Part 3 of a model-specific five-part series about how to install a FASS Platinum fuel system.

Please find the links to Part 1, Part 2, Part 4, and Part 5 here.

Step 3: Identify fuel line configuration.
Fuel lines older than six-years old (excluding nylon type fuel lines) should be replaced due to interior lining deterioration. This condition can cause problems including fuel starvation, uneven fuel tank levels, etc.

There are three common types of fuel systems.

1. Double-Draw/Double Return Line System, found on most trucks built from 1994-present.
The FASS FLK-S03 fuel line kit has the necessary components for this installation.

2. Single-Draw / Single Return Line System, found on trucks built before 1994 (except for the 359 Peterbilt).
The FASS FLK-S02 fuel line kit has the necessary components for this installation.

3. The 359 Peterbilt has this fuel system: Single Draw Out of Cross-over Fuel Line/Single Return Line System.

If you have this semi-truck, it is recommended to convert to a duel tank system (either a complete Double-Draw/Double Return Line System or a true Single Draw/Single Return Line System.)

Two other popular Class 8 trucks are the Mercedes 4000 Series and the Volvo D12-D15. Both types have the similar return line systems (both are double-draw/double return). However FASS FLK-S04 has the Mercedes' components, and the FLK-S05 has the Volvo's.