Caterpillar 3406 3406B 3406C Fuel Injection Line | Cylinder 5 | Costex 191-7945

Costex fuel injection line for Caterpillar 3406, 3406B and 3406C engines, cylinder 5 position. Caterpillar references it as 191-7945. Each cylinder uses a different line, so confirm your cylinder position before ordering. This line does not fit 3406E engines.

Key Features

• Cylinder 5 position line — one of six position-specific lines on the engine
• Direct replacement for Caterpillar 191-7945
• Covers 3406, 3406B and 3406C truck and machine applications
• Also replaces earlier Caterpillar line numbers for the same position

Specifications

• Caterpillar OE reference: 191-7945
• Component type: Fuel injection line
• Cylinder position: 5
• Condition: New
• Engines: Caterpillar 3406, 3406B and 3406C
• Sold as: each

Compatibility & Fitment

• Caterpillar 3406, 3406B and 3406C engines
• Machines: 980F and 980G wheel loaders, D8N and D8R track-type tractors, 826C compactor, D350E and D400E articulated trucks

Position gate — this is the cylinder 5 line. The other positions use different lines: 191-7941, 191-7942, 191-7943, 191-7944 and 191-7946. Count from the front of the engine and confirm your position before ordering.

Fitment gate — this line does not fit the Caterpillar 3406E. The 3406E uses a different fuel system arrangement. Confirm your engine is a 3406, 3406B or 3406C before ordering.

Installation note — if one line has failed on an engine of this age, the others are the same age and have seen the same heat cycles. Many shops replace all six lines together, along with the mounting clamps.

Common interchanges: 4P-9665, 7C-3425, 4P-3925

Conclusion

This is the Costex fuel injection line for the cylinder 5 position on Caterpillar 3406, 3406B and 3406C engines, replacing CAT 191-7945. Confirm your cylinder position and that your engine is not a 3406E before ordering, and consider replacing all six lines together.