6BT Injector Fuel Supply Tube 3918507 Specifications & Engine Fitment
The 6BT injector fuel supply tube 3918507 is a high-pressure fuel line for cylinder #1 on Cummins 6B series 5.9L diesel engines. It connects the fuel injection pump delivery valve to the fuel injector.
Technical Specifications: Cummins Fuel Line 3918507
| Specification Parameter | Details |
| Part Number | 3918507 |
| Part Name | Injector Fuel Supply Tube |
| Cylinder Position | #1 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 & Installation Notes
- Engine Series: Fits Cummins 6B and 6BT 5.9L 6-cylinder diesel engines.
- Position: Cylinder #1 high-pressure line.
- Maintenance: Check line clamps and vibration isolators during installation. Loose clamps allow vibration, which can lead to line fatigue or leaks.
Support at YIZHI POWER Need to confirm if this part fits your engine?
- Find your Cummins Engine Serial Number (ESN) on the engine dataplate.
- Contact YIZHI POWER on WhatsApp (+86 18671978898).
- We will check the part fitment in the Cummins EPC catalog for free.
