Product Description
The Cummins 3924346 Genuine Female Branch Tee is an OEM fitting used in vacuum pump and injection pump-related plumbing on Cummins B-Series engines. This high-quality tee fitting ensures proper sealing, leak-free performance, and correct flow routing for vacuum-assisted systems and pump interfaces. Manufactured to Cummins’ exact dimensional and material standards, this genuine Cummins component is superior to aftermarket brass tees that often deform or fail under diesel-engine vibration.
If you are servicing vacuum pump components, replacing cracked or leaking lines, or performing restoration on an ISB/B-Series platform, the 3924346 female branch tee restores original factory reliability and ensures proper vacuum/injection pump function.
Fitment
- Cummins 5.9L ISB Engines (various model years – ESN verification recommended)
- Cummins B-Series vacuum pump & injection pump plumbing systems
- Used in OEM vacuum line routing where a female branch tee is required
Note: Because Cummins used multiple vacuum and fuel-line configurations depending on the vehicle and chassis manufacturer, engine serial number (ESN) is recommended for precise confirmation.
Cross-Reference (Cummins-Only)
Related Cummins OEM hardware used in vacuum/injection pump assemblies:
• Cummins 3900625 OEM Hex Flange Head Cap Screw
• Cummins 3915104 OEM Regular Hexagon Nut – ISB Throttle/Lever Hardware
• Cummins 3909395 OEM Spring Hose Clamp
FAQ
What does the Cummins 3924346 female branch tee connect?
This tee is typically used to join vacuum pump lines and injection pump-related plumbing in ISB and B-Series systems.
Is this an OEM metal tee or a plastic aftermarket equivalent?
This is a genuine Cummins OEM component, built to withstand diesel-engine vibration and pressure without cracking.
Does this fitting work on 12-valve engines?
It is primarily used on ISB and later B-Series configurations. Some industrial 12-valve layouts use it, but ESN verification is recommended.
Can I use hardware-store tee fittings instead?
No. Generic fittings often leak or split under diesel system loads. Only genuine Cummins fittings match OEM tolerances and durability.
Specifications for cummins 3924346
| Specification | Value |
|---|---|
| Brand | Cummins Genuine Parts |
| Part Number | 3924346 |
| Component Type | Female Branch Tee (Vacuum/Injection Pump) |
| UPC | Not Published |
| GTIN | Not Published |
| Cross Reference | Used across ISB/B-Series vacuum and pump plumbing |
| E-Codes | N/A |
| Shipping Weight | 0.05 lbs |
| Package Dimensions | 1 x 1 x 1 in |
| Prop 65 Warning | Not Applicable |
