The part is the heart of the air conditioning system on the HOWO MAX 4X2 tractor, providing cooled and dehumidified air for driver comfort. This genuine HOWO compressor system kit includes the condenser, high-pressure and low-pressure pipeline assemblies, fixing clamps, brackets, evaporator pipe clamp, refrigerant, and all necessary mounting bolts. When you choose authentic Howo Parts, this compressor system guarantees OE fitment, efficient cooling, and long-term reliability. Below are detailed descriptions of every component included with this compressor system assembly.
The condenser is a heat exchanger mounted in front of the radiator that dissipates heat from the refrigerant. This compressor system component is made from aluminium with multi-flow microchannel tubes and corrugated fins, offering superior heat transfer efficiency. The condenser converts high-pressure refrigerant vapour into liquid, a critical step in the refrigeration cycle of The part. Its compact design fits perfectly in the HOWO MAX 4X2 front end.
Two M6 flange bolts (ZQ1840630) and one M6 flange bolt (ZQ1840620) are used to secure various components of The part, such as the condenser and fixing clamps. These high-strength bolts feature an integral flange that distributes load evenly, eliminating the need for washers. They are made from grade 8.8 steel with a zinc-plated finish, resisting corrosion and ensuring durable fastening of The part parts.
Four M8 flange bolts (ZQ1840830) and three M8 flange bolts (ZQ1840825) are supplied for mounting the pipeline brackets and other heavy components of The part. These bolts provide strong clamping force and are essential for maintaining the alignment of the high-pressure and low-pressure lines. The flange head eliminates the need for separate washers, simplifying installation of The part.
This high-pressure pipeline assembly carries refrigerant from the compressor to the condenser. Designed specifically for the MAX MC11 engine, this compressor system pipe is made from seamless aluminium with a corrosion-resistant coating. It features precision-formed end fittings with O-ring seals to prevent refrigerant leakage. The assembly includes a built-in pressure sensor port for system diagnostics.
The fixing clamp is a rubber-insulated steel bracket that secures the refrigerant lines to the chassis. This compressor system clamp prevents chafing and vibration damage to the pipelines, ensuring long service life. It is designed to fit the specific diameter of the high-pressure and low-pressure lines used in The part of the HOWO MAX 4X2.
This bracket provides a rigid mounting point for the refrigerant pipelines on the MC11 engine variant. It is made from stamped steel with a black electro-coat finish, and includes integrated clips that hold the lines securely. The part bracket ensures that the pipes remain clear of moving parts and hot surfaces, maintaining system integrity.
This low-pressure pipeline assembly returns gaseous refrigerant from the evaporator to the compressor. Part of The part, it is made from flexible aluminium tubing with rubber hose sections to absorb vibration. The assembly includes a service port for recharging and a temperature sensor mounting point, ensuring accurate control of The part.
The cold steam pipe assembly connects the expansion valve outlet to the evaporator inlet, carrying cooled refrigerant into the cab. This compressor system pipe is insulated to prevent condensation and maintain low temperature. It is made from corrosion-resistant aluminium with a smooth internal bore to minimise pressure drop, ensuring maximum cooling capacity of The part.
This clamp secures both the inlet and outlet pipes of the evaporator to the firewall. It features a dual-saddle design that holds two pipes simultaneously, reducing vibration and noise. The part clamp is made from durable plastic with a rubber insert to prevent chafing, ensuring the pipes remain secure throughout the life of The part.
The system includes 70 units of R-134a refrigerant, the correct charge for the HOWO MAX 4X2 compressor system. This high-purity refrigerant is free of moisture and contaminants, ensuring efficient heat transfer and compressor lubrication. Using the correct refrigerant quantity is vital for The part to deliver optimal cooling performance and prevent compressor damage.
Compressor system – genuine HOWO complete A/C compressor and condenser kit for MAX 4X2
This compressor system includes the condenser, all pipeline assemblies, clamps, brackets, bolts, and refrigerant. Everything needed to rebuild the air conditioning system is in one comprehensive kit.
The high-pressure and low-pressure lines in this compressor system are made from corrosion-resistant aluminium with protective coatings, ensuring long life even in harsh road conditions.
The kit contains the exact quantity of R-134a refrigerant required for the MAX 4X2 compressor system, eliminating guesswork and ensuring optimal cooling performance from the first start.
All pipelines and mounting brackets are pre-formed to the exact geometry of the HOWO MAX 4X2 chassis, guaranteeing that The part installs without modification and without clearance issues.
The part on the HOWO MAX 4X2 uses a belt-driven compressor to compress refrigerant gas, which then travels through the high-pressure pipeline to the condenser. The condenser releases heat, turning the gas into liquid. The liquid refrigerant passes through the expansion valve and enters the evaporator as a cold mist, absorbing heat from the cabin air. The low-pressure pipeline returns the vapour to the compressor, completing the cycle.
The part relies on precise sealing and proper refrigerant charge to function efficiently. The condenser, pipelines, and clamps are designed to withstand engine vibrations and road shocks. A well-maintained compressor system ensures a comfortable cab environment, especially in hot climates. Regular inspection of The part components is recommended to prevent leaks and maintain performance.
Before installing The part, ensure the A/C system is depressurised and the battery is disconnected. Remove the old condenser, pipelines, and brackets. Install the new condenser using the M6 and M8 flange bolts (torque 10 Nm and 20 Nm respectively). Mount the high-pressure and low-pressure pipelines using the fixing clamps and pipeline brackets, securing them with the provided bolts.
Connect the cold steam pipe to the evaporator and secure with the evaporator pipe clamp. Ensure all O-ring seals are lubricated with PAG oil before connection. Torque all line fittings to 25 Nm. Add the specified amount of R-134a refrigerant (70 units) using an A/C charging station. Start the engine and test The part for cooling performance and leaks. The part is now ready for service.
If The part does not cool, check the refrigerant level first. Low refrigerant indicates a leak in the system; inspect all connections and the condenser for damage. A noisy compressor may indicate low oil or a failing clutch; check the oil level in The part. If the condenser is blocked by debris, cleaning may restore efficiency.
A broken fixing clamp can cause pipeline vibration and eventual rupture; replace any damaged clamps. If the evaporator inlet and outlet pipe clamp is loose, the pipes may rub against the firewall, causing leaks. Always use genuine HOWO compressor system components for repairs to ensure proper fit and reliability.
Inspect The part annually or every 40,000 km. Check the condenser for debris and clean it with compressed air. Inspect the pipelines for signs of rubbing or corrosion. Ensure all clamps and brackets are secure – retighten bolts if necessary. Check the refrigerant pressure using a manifold gauge; recharge if low.
Replace the receiver-dryer (if applicable) every two years. The A/C refrigerant should be recovered and recharged using proper equipment. Regular maintenance of The part extends its life and maintains efficient cabin cooling. Always use the correct type and quantity of PAG oil when servicing The part.
This compressor system kit is specifically designed for the HOWO MAX 4X2 tractor with MC11 and MC13 engines. It fits all production years from 2018 onward and is compatible with both standard and high-roof cab variants. The high-pressure and low-pressure pipeline assemblies are tailored for the MAX MC11 engine layout.
The condenser size matches the front end opening of the MAX 4X2. This compressor system kit is also suitable for SITRAK C7H and HOWO T7H models with the same cooling system architecture. It is not compatible with older WD615 or A7 models, which use different pipe routing and condenser dimensions. Always verify your vehicle’s engine type and chassis configuration before ordering.
Aftermarket compressor system components often have poorer heat exchange efficiency, leading to weak cooling. Generic pipelines may not have the correct routing, causing kinks or rubbing that leads to leaks. Non-genuine clamps and brackets may not fit properly, allowing pipes to vibrate and fail prematurely. Counterfeit refrigerant may contain impurities that damage the compressor.
Genuine HOWO compressor system components are manufactured to SINOTRUK’s exacting standards, ensuring optimal cooling performance and durability. The small additional cost of a genuine compressor system kit is well worth the comfort and reliability it provides, especially in hot climates where a working A/C is essential.
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