Description
PAI 680350E is a new aftermarket fuel transfer pump for Detroit Diesel Series 60 11.1L, 12.7L, and 14.0L engines (DDEC III through DDEC VI), replacing Detroit OEM 23532981, 23537686, 23505245, 23517845 and the reman number R23537686. The pump bolts to the cylinder block and feeds the head’s fuel galleries that supply the unit injectors at idle and load.
Signs You Need a New Fuel Transfer Pump
- Hard starting or extended cranking, especially after sitting overnight
- Loss of power under load or while climbing grades
- Surging or low fuel pressure on the gauge / data link
- Fuel starvation symptoms at high RPM
- Visible fuel weeping from the pump body, mounting flange, or fittings
Specifications
| Manufacturer | PAI Industries |
|---|---|
| Part Number | 680350E |
| Part Type | Fuel Transfer Pump (Lift Pump) |
| Drive | Gear-driven from the front gear train |
| Engine Compatibility | Detroit Diesel Series 60 (11.1L, 12.7L, 14.0L) |
| Condition | New |
| Warranty | 1-Year Unlimited Mileage (PAI) |
Cross References
This part replaces or is equivalent to the following part numbers:
- Detroit Diesel: 23532981, 23537686, 23505245, 23517845
- Detroit Diesel (reman): R23537686
- PAI Industries: 680350, 680350OEM
Applications
This fuel transfer pump fits the following engines:
- Detroit Series 60 11.1L (1987–1998)
- Detroit Series 60 12.7L (1987–2007, DDEC III through DDEC V)
- Detroit Series 60 14.0L (2001–2011, DDEC IV through DDEC VI)
Representative trucks using these engines:
- Freightliner FLD, Classic, Century, Columbia, Coronado, Argosy
- Kenworth W900, T800, T660, T600
- Peterbilt 367, 377, 378, 379, 386, 387, 388, 389
- Western Star 4900
- International / Navistar 9000-series with Detroit S60
- Sterling A-Line, L-Line
Verify your engine serial number and pump-port orientation before ordering. Replace the o-rings and gaskets at install, prime the fuel system, and confirm pressure is in spec on a manifold gauge before returning to service.
