DuraWRX ASP-918-1731-18 DEF Header | 18 in | Coaxial Heater | Caterpillar & Perkins

DuraWRX diesel exhaust fluid header with coaxial heater, part number ASP-918-1731-18, for Caterpillar and Perkins engines with Tenneco-supplied aftertreatment systems and an 18 inch DEF tank. Replaces the Cat DEF sensor head assembly. Complete header with 40 micron in-tank suction filter, coaxial coolant heater and digital CANbus level and quality sensor. Replaces Caterpillar 593-2339, 462-3232, 454-9432 and 468-7295.

Key Features:

• Coaxial coolant heater for cold-weather DEF thawing
• 40 micron in-tank suction filter
• Digital CANbus level and quality sensor
• Operating voltage range of 9 to 32 VDC
• Deutsch DT04-4P sealed connector
• Replaces four Caterpillar and six related OE numbers

Specifications:

• Part number: ASP-918-1731-18
• Brand: DuraWRX
• Component type: DEF header assembly with coaxial heater
• DEF header height: 18 in
• In-tank filter: 40 micron
• Sensor type: Digital CANbus
• Operating voltage: 9-32 VDC
• Electrical connection: Deutsch DT04-4P
• Mating connector: Deutsch DT06-4S
• DEF suction fitting: 3/8 in, SAE J2044
• DEF return fitting: 5/16 in, SAE J2044
• Coolant inlet and outlet fittings: 5/8 in hose bead
• Tank interface: 4.05 in diameter bore seal
• Overall length: 17.382 in (441.49 mm)
• Flange to connector height: 0.980 in (50.29 mm)
• Flange diameter: 4.750 in (120.64 mm)
• Body diameter: 4.000 in (101.6 mm)
• Caterpillar reference numbers: 593-2339, 462-3232, 454-9432, 468-7295
• Other reference numbers: 82196512, 82217519, 82224130, 82249727, T400737, T434825
• Weight: 6 lb

Wiring:

• Pin 1, green: CAN low
• Pin 2, yellow: CAN high
• Pin 3, black: ground
• Pin 4, red: power

Compatibility / Fitment:

Fits Caterpillar and Perkins engines with Tenneco aftertreatment systems and an 18 inch DEF tank header.

Hard fitment gate — header height and heater type:

This is the 18 inch coaxial-heater header. DuraWRX builds the same header in 11 inch and 13 inch, and the 13 inch replaces a different set of Cat numbers. Measure your existing header and match the Cat part number before ordering.

Second gate — fitting sizes. This header uses a 3/8 inch DEF suction and 5/16 inch DEF return. Confirm before ordering.

What is not included: the Deutsch DT06-4S mating connector is not supplied.

Common interchanges: 593-2339, 462-3232, 454-9432, 468-7295, T434825, T400737, 82196512, 82224130, 82217519, 82249727

Conclusion:

DuraWRX ASP-918-1731-18 is the 18 inch coaxial-heater DEF header with 40 micron filter and digital CANbus sensor for Caterpillar and Perkins engines, replacing Cat 593-2339 and three related Cat numbers. Match your Cat part number and header height before ordering.