6BT Injector Fuel Supply Tube 3918508 Specs & Engine Fitment
The 6BT injector fuel supply tube 3918508 is a precision-engineered high-pressure fuel line designed specifically for the #2 cylinder on Cummins 6B series diesel engines. Built to endure extreme injection pressures and heavy engine vibration, this fuel line delivers smooth, leak-free fuel flow directly to the injector.
Technical Specifications: Cummins Fuel Line 3918508
| Specification Parameter | Details |
| Part Number | 3918508 |
| Part Name | Injector Fuel Supply Tube |
| Cylinder Position | #2 Cylinder |
| Engine Configuration | Cummins 6B / 6BT 5.9L |
| Line Length | 770 mm |
| Inside Diameter (ID) | 1.8 mm |
| Injector Tube Nut Size | 14 mm |
| Delivery Valve Tube Nut Size | 12 mm |
| Ref No. | Part Number | Part Description | Qty Required | Remarks / Application |
| — | PP98536 | Injector Pipes | — | Injector Plumbing Group |
| 1 | 3918109 | Hexagon Flange Head Cap Screw | 3 | M8 x 1.25 x 25 |
| — | 3918513 | Injector Fuel Supply Tube | 1 | — |
| 2 | 3282942 | Tube Brace | 1 | — |
| 3 | 3903723 | Plain Washer | 2 | — |
| 4 | 3904519 | Tube Brace | 1 | — |
| 5 | 3917712 | Hexagon Head Cap Screw | 2 | M5 x 0.80 x 22 |
| 6 | 3917747 | Vibration Isolator | 2 | — |
| 7 | 3918507 | Injector Fuel Supply Tube | 1 | #1 Cylinder |
| 8 | 3918508 | Injector Fuel Supply Tube | 1 | #2 Cylinder |
| 9 | 3918509 | Injector Fuel Supply Tube | 1 | #3 Cylinder |
| — | 3922419 | Injector Fuel Supply Tube | 1 | — |
| 2 | 3282942 | Tube Brace | 1 | — |
| 3 | 3903723 | Plain Washer | 4 | — |
| 4 | 3904519 | Tube Brace | 1 | — |
| 5 | 3917712 | Hexagon Head Cap Screw | 4 | M5 x 0.80 x 22 |
| 6 | 3917747 | Vibration Isolator | 4 | — |
| 10 | 3917778 | Tube Brace | 1 | — |
| 11 | 3918510 | Injector Fuel Supply Tube | 1 | #4 Cylinder |
| 12 | 3918512 | Injector Fuel Supply Tube | 1 | #6 Cylinder |
| 13 | 3922420 | Injector Fuel Supply Tube | 1 | #5 Cylinder |
Application & System Compatibility
Part number 3918508 is custom-bent to match the exact routing requirements of the second cylinder:
- Cummins Engine Series: Cummins 6B / 6BT 5.9L 6-cylinder diesel engines.
- Cylinder Placement: Dedicated fuel line for Cylinder #2.
- Mechanic’s Note: Inspect vibration isolators and tube braces during installation. Keeping high-pressure fuel lines securely clamped prevents line cracking and leaks caused by harmonic engine vibrations.
Fast Verification & Global Support at YIZHI POWER
Fuel line routing varies across different industrial, marine, and truck specifications.
We will verify exact part compatibility in the official Cummins EPC catalog 100% free of charge.
Contact YIZHI POWER for genuine Cummins spares, high-pressure fuel lines, and fast worldwide delivery.
