Shop 456-0726 - Genuine CAT DEF Module Manifold Front Side - wisentpartscenter.com

Description

The 456-0726 Genuine CAT DEF Module Manifold is a diesel exhaust fluid manifold assembly used in the air inlet and exhaust aftertreatment system on select Caterpillar equipment. CAT lists this part as a Diesel Exhaust Fluid Module Manifold with a 3-pin connector, plastic/stainless-steel construction, and 0.16 L coolant capacity. The manifold helps support DEF system operation by managing DEF temperature and monitoring fluid-level-related functions within the aftertreatment system. This part is used across multiple CAT machine and engine platforms, including select C-series engines and equipment applications. Correct part matching is important because DEF system components vary by machine model, serial number, emissions configuration, and aftertreatment layout. Verify fitment by CAT model, serial number, original part number, and CAT SIS/parts information before ordering.

Purpose of the Part

The 456-0726 DEF module manifold supports DEF system operation in the SCR/aftertreatment system. It helps route and manage DEF-related fluid functions while supporting temperature and level monitoring. If the manifold or connected DEF components fail, the system may not dose DEF correctly, which can trigger emissions warnings, reduced performance, or machine derate.

Issue Symptoms / When to Replace

Common signs that the CAT 456-0726 DEF Module Manifold may need inspection or replacement include:

  • DEF system warning light or aftertreatment fault
  • SCR/DEF-related derate condition
  • DEF leakage around the manifold or connected lines
  • Damaged, cracked, or contaminated manifold body
  • Corroded, loose, or damaged 3-pin connector
  • Incorrect DEF temperature or level-related diagnostic readings
  • Repeated DEF system faults after confirming fluid quality and line condition

Fault codes can vary by CAT model, ECM, and aftertreatment configuration. Refer to CAT SIS / CAT ET for the exact diagnostic code and troubleshooting procedure.

Brand Information

CAT is Caterpillar’s parts brand for equipment, engine, drivetrain, hydraulic, and aftertreatment components used across Caterpillar machines and industrial engines. Genuine CAT parts are designed to match Caterpillar equipment specifications and system requirements. For DEF and SCR components, correct OEM fitment is important because fluid routing, connector type, sensor communication, and emissions-system operation must match the machine configuration.

Installation Notes

Install 456-0726 only after confirming the original part number and machine serial number. Inspect DEF lines, coolant connections, seals, electrical connector, and nearby aftertreatment components for leaks, contamination, or corrosion. Follow CAT SIS for torque specifications, coolant/DEF handling, system priming, leak testing, and final diagnostic verification.

How to Identify an OEM Part

A Genuine CAT 456-0726 DEF Module Manifold should be verified by the CAT part-number label, original CAT packaging, connector style, and any molded or stamped identification on the component. The part should match the original manifold removed from the machine and the part number shown in CAT SIS. Do not rely on visual appearance only, because aftermarket DEF manifolds may look similar but differ in connector, material, sensor configuration, or system compatibility.

Why buy from Wisent Parts
  • ⏱️
    Fast shipping
    Orders before 12PM EST ship same business day.
  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

Shop with confidence

Warrany & Return Information

Warranty Information

Wisent Parts offers a 180-day warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help—whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.

Cummins

Genuine Cummins parts for heavy-duty trucks. Browse OEM Cummins turbochargers, turbo actuators, fuel injectors, fuel pumps, EGR components, sensors, and more for ISB 6.7L, ISX15, ISL 8.9L, and other Cummins diesel engines.

View all