FAW Russian Urea Supply Section: 10 Critical Parts for Emission Compliance

The FAW Russian Urea Supply Section is a vital subsystem for the CA3250P66K24L1TE5Z dump truck, ensuring strict adherence to environmental regulations. By injecting DEF (Diesel Exhaust Fluid) into the exhaust stream, it neutralizes harmful NOx emissions. This guide details the plumbing and mounting hardware essential for keeping this SCR system operational in the harsh Russian climate.

FAW Russian Urea Supply Section

Coolant Circuit: Preventing Urea Crystallization

The FAW Russian Urea Supply Section faces a unique challenge in sub-zero temperatures: urea solution freezes at -11°C. To counteract this, the system integrates a heating loop that circulates engine coolant.

The connection point for this thermal management is the Connector – SCR Water Intake (Part No. 1160401-51B). This fitting taps into the engine’s water jacket, diverting hot coolant to the urea tank and dosing lines.

Maintaining a secure seal here is critical. The Gasket – Water Pipe Transition Flange (Part No. 1160402-51B) ensures that high-pressure coolant does not leak externally.

A leak in the FAW Russian Urea Supply Section coolant loop would have a double negative effect: engine overheating and a frozen SCR system. Frozen urea lines lead to immediate engine derating (power loss) by the ECU.

The return path for the coolant is managed by the Urea Return Water Connector (Part No. 1160401-1063). This fitting ensures that the coolant, having transferred its heat to the urea system, flows back to the engine radiator efficiently.

Connection Logic: Joints and Routing

The routing of fluid lines in the FAW Russian Urea Supply Section is handled by specialized connectors. The Circulating Water Connector (I) (Part No. 1160403-51B) and Circulating Water Connector (II) (Part No. 1160404-51B) are engineered for specific angles.

These angled connectors prevent kinks in the coolant hoses. A kinked hose restricts flow, reducing the heating efficiency of the urea tank. In the Russian winter, even a partial restriction can lead to localized freezing in the dosing pump.

These connectors are typically made from corrosion-resistant brass or stainless steel. The chemical environment around the urea system is harsh; urea itself is corrosive to certain metals (like copper).

Therefore, the FAW Russian Urea Supply Section uses compatible materials to prevent galvanic corrosion at the connection points. Ensuring these fittings are tight and corrosion-free is a standard part of the pre-winter inspection.

Mounting and Vibration Isolation

The plumbing and dosing components are secured by a series of brackets. The assembly includes three distinct types: Bracket (Part No. 1160013-54W), Bracket (Part No. 1160011-54W), and Bracket (Part No. 1160014-54W).

These brackets in the FAW Russian Urea Supply Section are designed to support the weight of the fluid-filled lines and prevent them from chafing against the chassis.

Vibration is the enemy of fluid lines. Without rigid support, the harmonic resonance of the diesel engine would cause the metal lines to fatigue and crack.

The brackets are secured using Hexagon Flange Bolts (Part Nos. Q1840840 and Q1840820). The flange head design eliminates the need for loose washers, simplifying installation in tight spaces.

Properly torquing these bolts ensures that the FAW Russian Urea Supply Section remains a static, secure assembly, immune to the shaking forces of the road and engine.

Component Breakdown List

The following table lists the specific components comprising the FAW Russian Urea Supply Section. Using correct part numbers is essential for maintaining the emissions compliance and operational reliability of the CA3250P66K24L1TE5Z.

Diagnostic Protocols for Emissions Health

Diagnosing the FAW Russian Urea Supply Section focuses on leak detection. White crystalline deposits around the Connector – SCR Water Intake or other fittings indicate a slow urea leak.

While the coolant itself leaves a different residue, the heat from the coolant pipe can cause leaking urea to crystallize rapidly. These crystals can corrode electrical connectors and metal brackets.

Check the condition of the coolant hoses connecting to the Circulating Water Connectors. If they feel spongy or brittle, the internal reinforcement may be failing.

A burst coolant hose here will drain the engine’s cooling system, leading to overheating. Regularly verify the torque on the Hexagon Flange Bolts securing the brackets. Loose brackets allow hoses to rub, creating chafe points that eventually leak.

Conclusion: Compliance and Reliability

The FAW Russian Urea Supply Section is a critical enabler for modern, low-emission transport in Russia. By integrating a robust heating circuit, FAW ensures that the SCR system remains functional even in the deepest freeze.

Every component, from the brass connectors to the steel brackets, is chosen for durability and corrosion resistance.

For fleet owners, maintaining this system is not just about avoiding fines; it is about vehicle uptime. A frozen or leaking FAW Russian Urea Supply Section will put the truck into “limp mode,” severely restricting speed and power. Using genuine parts guarantees that the thermal management properties of the system are preserved, keeping your fleet moving efficiently.