Description
The PAI 380151 is a long-stroke hand fuel-priming pump that replaces Caterpillar 137-5541 (interchangeable with 172-6291) on 3300- and 3400-series mechanical and electronic engines, including 3304, 3306, 3406, 3408, 3412 and the C7/C9/C10/C11/C12/C15/C18 platforms. It mounts directly to the secondary fuel filter base or fuel-priming pump pad and is supplied with PAI 331269 (OE 1P0436) base gasket. Used to prime the fuel system after filter changes or fuel-system service.
Signs You Need a New Hand Primer Pump
- Plunger stays depressed or no longer springs back
- Fuel leaks from the primer body or base gasket
- Hard starts or extended cranking after filter change
- Air in the fuel system that the primer can’t bleed out
- Cracked or seized plunger handle
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 380151 |
| Part Type | Hand Fuel Priming Pump (Long Stroke) |
| Engine Compatibility | Caterpillar 3300, 3400, C7, C9, C10, C11, C12, C15, C18 |
| Output | 41.4 strokes per liter (per Cat 137-5541 spec) |
| Gasket Included | Yes — PAI 331269 (OE 1P0436) |
| Overall Length | ~6.8 in |
| Width | ~2.8 in |
| Weight | ~1.44 lb |
| Warranty | 2-Year Unlimited Mileage |
Cross References
This primer pump replaces or is equivalent to the following part numbers:
- Caterpillar: 137-5541, 1375541, 172-6291, 1726291, 105-2508, 1052508, 4N-2511, 4W-0788, 6N-6800, 569-4546
Applications
This long-stroke hand primer fits the following engine families:
- Caterpillar 3304, 3306, 3306B, 3306C (mechanical, on-highway and industrial)
- Caterpillar 3406, 3406B, 3406C, 3406E (mechanical and electronic)
- Caterpillar 3408, 3408C, 3408E / 3412, 3412C, 3412E
- Caterpillar 3116, 3126, 3126B / 3176, 3196 / 3208
- Caterpillar C7, C9, C9.3, C10, C11, C12, C15, C18 (when equipped with hand primer base)
Representative vehicles and equipment using these engines:
- Kenworth W900, T800, C500 with 3406E or C15
- Peterbilt 379, 389 with 3406E or C15
- Freightliner Classic, FLD with 3406E
- Caterpillar wheel loaders, excavators, off-highway trucks running 3300/3400-series engines
Verify your fuel-filter housing has the hand-primer pad and that your engine uses the long-stroke variant (Cat 137-5541 family) before ordering. Always replace the base gasket when reinstalling.
