DIESEL FORWARD / ALLIANT POWER Viscous Water Pump Part No: AP63509
$702.23
Alliant Power AP63509 Viscous Water Pump, sold by Wofford Truck Parts, is an electrically actuated viscous coolant pump for Detroit DD13 and DD15 engines. The kit includes the variable-speed pump, a new mounting gasket, and a pump speed sensor to simplify a complete repair. Built to OEM specifications, it restores proper coolant circulation, stable operating temperatures, and dependable performance under heavy-duty service conditions. Ideal for fixing overheating, leaks, or pump-control fault codes quickly.
Specifications
The AP63509 electro-viscous water pump is designed for modern Detroit/Mercedes heavy-duty engines where coolant flow is electronically controlled for efficiency and precise temperature management. Alliant Power optimized this pump using CFD modeling and builds it in a QS9000 OE facility, using a premium plastic impeller for flow stability and durability. Every kit ships with a new sealing gasket and pump speed sensor, making it a complete service solution. Use AP63509 to replace worn or failing variable-speed pumps, restore consistent cooling under load, and protect your DD13/DD15 from heat-related downtime.
Weight
5
Compatibility
Freightliner Cascadia (Detroit DD13/DD15) — approx. 2008–current (engine-platform inference; verify by engine)
Western Star 49X (Detroit DD13/DD15) — approx. 2021–current
Western Star 49X (Detroit DD13/DD15) — approx. 2021–current
Alternative Part Numbers
- 47120001101
- 4712000901
- 4712001101
- 4712001601
- 472000701
- 4722001601
- 4722002001
- A 472 200 16 01
- A47120001101
- A4712000901
- A4712001101
- A4712001601
- A4722000701
- A4722001601
- A4722002001
- AP63509
- DDE EA4712000901
- DDE EA4712001101
- DDE EA4722000701
- DDE EA4722002001
- DDE RA4722002001
- EA47120001101
- EA4712000901
- EA4712001101
- EA4712001601
- EA4722000701
- EA4722001601
- EA4722002001
- RA4712001601
- RA4722000701
- RA4722001601
- RA4722002001
