Blue Bird Bus DEF Header | ASP5310-6606718 | 18 in | Analog | Weather-Pack | New

DuraWRX diesel exhaust fluid header, part number ASP5310-6606718, for 2012-2015 Blue Bird and Holland school buses with Cummins engines. Replaces the Blue Bird DEF multifunction head unit. 18 inch header with 40 micron in-tank suction filter, helical coolant heater and analog level and temperature sensor on Delphi Weather-Pack connectors. Replaces Blue Bird 10056545, 10035950, 10027844, 10019935 and 5011806.

Key Features:

• Analog level and temperature sensor on Delphi Weather-Pack WPT-4 and WPT-3 connectors
• Helical coolant heater for cold-weather DEF thawing
• 40 micron in-tank suction filter
• Covers five Blue Bird part numbers

Specifications:

• Part number: ASP5310-6606718
• Brand: DuraWRX
• Component type: DEF header assembly with helical heater
• DEF header height: 18 in
• In-tank filter: 40 micron
• Sensor type: Analog, level and temperature
• Electrical connection: Delphi WPT-4 (12015797) and WPT-3 (12015793), jumper harness
• Mating connectors: Delphi WPT-4 (12010974) and WPT-3 (12020827)
• DEF suction fitting: 3/8 in, SAE J2044
• DEF return fitting: 3/8 in, SAE J2044
• Coolant inlet and outlet fittings: 5/8 in hose bead
• Tank interface: 4.05 in diameter bore seal
• Overall length: 17.384 in (441.55 mm)
• Flange to connector height: 1.895 in (48.13 mm)
• Body diameter: 4.000 in (101.6 mm)
• Blue Bird reference numbers: 10056545, 10035950, 10027844, 10019935, 5011806
• Weight: 6 lb

Wiring — Delphi WPT-4, level:

• Pin A: plugged
• Pin B: level sender signal
• Pin C: level sender return
• Pin D: plugged

Wiring — Delphi WPT-3, temperature:

• Pin A: temperature signal
• Pin B: plugged
• Pin C: temperature ground

Compatibility / Fitment:

Fits 2012-2015 Blue Bird and Holland buses with Cummins engines, EPA13 emissions.

Three hard fitment gates apply:

Connector type. This header uses Delphi Weather-Pack WPT-4 and WPT-3 connectors. DuraWRX builds other 18 inch bore-seal headers with Deutsch connectors for other applications. Confirm your bus harness before ordering.

Sensor output. Analog level and temperature. Digital CANbus systems require a different header.

Header height. 18 inch. Measure your existing header before ordering.

What is not included: the Delphi WPT-4 and WPT-3 mating connectors are not supplied.

Common interchanges: 10056545, 10035950, 10027844, 5011806, 10019935

Conclusion:

DuraWRX ASP5310-6606718 is the 18 inch analog DEF header for 2012-2015 Blue Bird and Holland school buses with Cummins engines, replacing Blue Bird 10056545 and four related numbers. Confirm your connector type before ordering — this header uses Delphi Weather-Pack connectors.