The Inner hub bearing is a comprehensive cooling system hardware kit for the HOWO MAX 4X2 tractor, designed to secure and connect the radiator, intercooler, expansion tank, and all associated hoses with precision‑engineered clamps, brackets, and fasteners. This genuine HOWO Inner hub bearing kit includes all elastic hoops, steel‑band clamps, plastic fastening belts, cooling module assembly, mounting brackets, expansion water tank, connecting hoses, steel pipes, and rubber blocks – every component required for a complete cooling system installation or overhaul. When you choose authentic Howo Parts, this Inner hub bearing guarantees OE fitment, leak‑free connections, and reliable engine temperature control. Below are detailed descriptions of every component included with this Inner hub bearing assembly.
Fifteen elastic hoops with clips (diameter 28mm) are supplied to secure hoses and pipes within the Inner hub bearing system. These spring‑steel clamps provide constant tension, compensating for thermal expansion and contraction of the rubber hoses. Each hoop features a quick‑release clip for easy installation and removal without tools, ensuring a tight, leak‑proof seal on all connections.
Two steel‑band elastic hose clamps are used for larger‑diameter hose connections in the Inner hub bearing cooling circuit. These clamps are made from corrosion‑resistant stainless steel with a worm‑gear mechanism that provides even clamping force around the entire circumference, preventing hose slippage and coolant leaks even under high pressure.
One elastic hoop with a 23mm diameter clip is provided for medium‑sized hose connections. This clamp is part of the Inner hub bearing system, offering the same self‑tensioning design that maintains a consistent seal across a wide temperature range.
One 19mm diameter elastic hoop is used for smaller coolant hoses. The clip design allows for rapid attachment and detachment, simplifying servicing of the Inner hub bearing cooling system.
Four elastic hoops with 17mm diameter clips are included for fine‑bore connections. These clamps provide a secure hold on small‑diameter hoses, ensuring that every joint in the Inner hub bearing system remains sealed under vibration and thermal cycling.
Two plastic fastening belt assemblies are supplied to organise and secure wiring and hose routing within the Inner hub bearing system. These high‑strength nylon ties with self‑locking mechanisms keep the cooling hoses neatly bundled and prevent chafing against sharp edges.
The cooling module assembly is the central component of the Inner hub bearing system, integrating the radiator, intercooler, and fan shroud into a single pre‑assembled unit. This module is designed for the HOWO MAX 4X2, providing optimal cooling capacity for the MC13 engine.
The inset proof net is a protective mesh that fits over the front of the cooling module, preventing insects and debris from clogging the radiator fins. This Inner hub bearing component is made from corrosion‑resistant steel with a black powder‑coat finish.
Two cooling module mounting brackets are used to attach the radiator and intercooler to the chassis frame. These heavy‑duty steel brackets are precision‑formed to align with the Inner hub bearing mounting points, ensuring a rigid, vibration‑proof installation.
Four M12x1.25 flange bolts with toothed serrations secure the cooling module to its mounting brackets. These high‑strength bolts provide a positive locking action to prevent loosening under engine vibration, essential for the integrity of the Inner hub bearing assembly.
Four M14x1.5 flange bolts with serrated heads are used for attaching heavy components of the Inner hub bearing system. The serrations bite into the mating surface, providing a secure, vibration‑proof fastening that maintains clamping force over time.
The expansion water tank is a critical component of the Inner hub bearing cooling system, providing a reservoir for coolant overflow and a degassing point. It is made from translucent polypropylene with a pressure cap rated to 1.2 bar, allowing visual inspection of the coolant level.
Four M10 large washers (Q402B10) and six M8 large washers (Q402B08) are supplied to distribute the clamping load under bolt heads and nuts. These hardened steel washers prevent damage to the Inner hub bearing brackets and ensure even pressure distribution.
Two additional cooling module mounting brackets (YG9525537017) are provided to support the lower section of the cooling module. These brackets are designed to absorb road vibration and maintain the alignment of the Inner hub bearing assembly.
Four block rubbers (WG9525530197) and four block rubbers (WG9525530198) are included as vibration‑damping mounts for the cooling module. These rubber isolators reduce the transmission of chassis vibration to the Inner hub bearing cooling components, extending their service life.
Four large washers are supplied to distribute the load under the cooling module mounting bolts. These washers are sized to match the M10 fasteners and are made from zinc‑plated steel for corrosion resistance.
Six M10 flange bolts (two 35mm length and four 30mm length) are used for attaching the cooling module brackets and the expansion tank. The flange head eliminates the need for separate washers, simplifying assembly of the Inner hub bearing system.
Two M10 flange nuts are provided to secure the cooling module bracket to the chassis. The flange design provides a large bearing surface and a self‑locking action, ensuring the Inner hub bearing components remain securely fastened.
Two radiator connecting hoses (YG9525537017 and YG9525537072) are supplied to connect the radiator to the engine block. These hoses are made from EPDM rubber with a textile reinforcement, rated for coolant temperatures up to 120°C and pressure up to 2.5 bar.
Four waveform spring clamps are used to secure the radiator hoses. These clamps feature a waved design that provides a constant, even clamping force, accommodating hose expansion without cutting into the rubber. They are essential for maintaining leak‑free connections in the Inner hub bearing system.
Two intercooler connecting hoses (YZ952553001081 and YZ952553001082) connect the turbocharger outlet and intake manifold to the intercooler. These high‑temperature silicone hoses are reinforced with aramid fibres to withstand boost pressures up to 4 bar, a critical part of the Inner hub bearing cooling circuit.
Four strong clamps are provided for securing the intercooler hoses and other heavy‑duty connections. These clamps have a wider band and stronger tightening mechanism, ensuring a secure hold on the Inner hub bearing high‑pressure lines.
A steel pipe that connects the expansion tank to the cooling circuit. This pipe is made from seamless steel with a corrosion‑resistant coating, providing a rigid, durable conduit for coolant flow within the Inner hub bearing system.
Two transition steel pipes (YZ952553001026 and YZ952553000202) are used to adapt between different hose diameters or routing paths. These pipes are precision‑bent to match the chassis layout and are coated to resist rust.
Multiple chassis heating hoses (with various encodings) are supplied to route coolant to the cab heater core and other auxiliary heating circuits. These hoses are made from oil‑resistant rubber and are pre‑cut to the correct lengths for the HOWO MAX 4X2 chassis.
The ejector housing is a plastic component that channels air and coolant from the engine to the expansion tank. It includes a pressure‑relief valve and is an integral part of the Inner hub bearing cooling system’s degassing function.
Two M8 hex flange nuts are used for securing the ejector housing and other small brackets. The flange provides a large bearing surface and a self‑locking action.
Three connecting hoses (YZ952553000271, YZ952553000272, YZ952553000273) are provided to link the expansion tank to the cooling system. These hoses are reinforced and shaped to the correct routing, ensuring proper coolant flow and air release.
The engine air release hose allows trapped air to escape from the engine block to the expansion tank. This small‑diameter hose is a critical part of the Inner hub bearing degassing system, preventing air pockets that can cause overheating.
One elastic hoop with a 30mm diameter clip is provided for larger hose connections. This clamp completes the comprehensive set of fastening solutions for the Inner hub bearing cooling system.
Inner hub bearing – genuine HOWO complete cooling system and mounting hardware kit for MAX 4X2
This Inner hub bearing kit includes every clamp, bracket, hose, and fastener needed for a full cooling system installation. No additional parts are required, making the Inner hub bearing a one‑stop solution for radiator and intercooler mounting.
All elastic hoops and hoses in this Inner hub bearing kit are manufactured from high‑grade materials that resist ageing, heat, and coolant chemicals. The spring‑steel clamps maintain constant tension, ensuring leak‑free connections for the life of the vehicle.
The Inner hub bearing brackets are stamped to exact SINOTRUK dimensions, guaranteeing correct alignment of the cooling module and intercooler. The included rubber blocks isolate vibration, protecting the cooling system from damage.
Every bolt, nut, and washer in this Inner hub bearing kit is supplied with the correct grade and finish. The serrated flange bolts and self‑locking nuts ensure a secure, vibration‑proof assembly that will not loosen over time.
The Inner hub bearing system manages the engine’s thermal load by circulating coolant through the radiator, intercooler, and heater core. The cooling module assembly, mounted on the Inner hub bearing brackets, receives air from the front grille to dissipate heat from the engine coolant and charge air. The expansion water tank provides a reservoir for coolant expansion and degassing, while the steel pipes and rubber hoses direct flow to and from the engine.
The elastic hoops and steel‑band clamps secure all hose connections, preventing leaks under pressure. The chassis heating hoses supply warm coolant to the cab heater, ensuring driver comfort in cold weather.
The ejector housing removes air from the cooling circuit, maintaining efficient heat transfer. Every component of the Inner hub bearing system is designed for reliable, long‑lasting performance, protecting the engine from overheating and ensuring consistent cabin temperature.
Before installation, drain the coolant and remove the old cooling components. Install the cooling module assembly onto the Inner hub bearing brackets using the M12 and M14 flange bolts, torquing to specification. Attach the rubber blocks to isolate vibration. Fit the expansion water tank and connect the steel pipes and hoses using the supplied elastic hoops and strong clamps.
Secure all hose joints with the appropriate clamps, ensuring they are fully seated. Install the intercooler connecting hoses and the chassis heating hoses, routing them as per the original layout.
Connect the engine air release hose and the expansion tank hoses. Fasten all brackets with the M10 bolts and nuts, using the large washers where required. Reconnect the coolant hoses, refill the system with the correct coolant mixture, and bleed the air using the ejector housing. Check all connections for leaks. The Inner hub bearing system is now ready for service.
If the engine overheats, check the Inner hub bearing cooling module for debris blockage and ensure the radiator hoses are not kinked. A loose hose clamp can cause coolant leaks; tighten or replace the elastic hoop. If the expansion tank level drops,
inspect the hoses and steel pipes for cracks. A rattling noise from the front may indicate a loose Inner hub bearing bracket; retorque the bolts. If the cab heater does not produce heat, the chassis heating hoses may be blocked or air‑locked; bleed the system. Always use genuine Inner hub bearing components for replacement.
Inspect the Inner hub bearing cooling system every 50,000 km. Check all hose clamps for tightness and replace any that are corroded or damaged.
Inspect the rubber hoses for swelling, cracks, or hardness; replace if necessary. Clean the cooling module fins with compressed air. Check the expansion tank cap for proper sealing. Replace the coolant every two years or as specified. A well‑maintained Inner hub bearing system ensures reliable engine cooling and extends the life of the engine.
This Inner hub bearing kit is specifically designed for the HOWO MAX 4X2 tractor with MC11/MC13 engines and is compatible with all production years from 2018 onward. It fits both standard and heavy‑duty cooling packages.
The kit is also suitable for SITRAK C7H and HOWO T7H models that share the same cooling system architecture. It is not compatible with older WD615 models. Always verify your vehicle’s cooling system configuration before ordering.
Aftermarket cooling system components often use inferior rubber that degrades quickly, leading to hose failure and coolant loss. Generic clamps may not provide adequate sealing force, causing leaks under pressure.
Non‑genuine brackets can misalign the cooling module, reducing airflow and cooling efficiency. Genuine HOWO Inner hub bearing components are manufactured to SINOTRUK’s exacting standards, using high‑quality materials and precision engineering. The small additional cost of a genuine Inner hub bearing kit is insignificant compared to the cost of engine damage from overheating.
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