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The WG9003320309 Cylindrical Roller Bearing NUP309E is a premium, heavy-duty chassis transmission bearing engineered specifically for SINOTRUK Howo trucks, providing high radial load capacity and bidirectional axial location for the gearbox intermediate shaft. As a trusted supplier of genuine Sinotruk howo parts, we offer this OEM-grade NUP309E bearing as a direct replacement for the original factory unit. The WG9003320309 bearing ensures correct 45 × 100 × 25 mm fitment, stable shaft support and dependable operation on Howo A7, T7H, HOWO 371 and HOWO 380 models with HW19710 and HW13710 gearboxes.
Manufactured from high-carbon chromium bearing steel with precision-ground raceways, a hardened cage and a controlled internal clearance, this NUP309E cylindrical roller bearing is built to exact OEM dimensions. Its NUP configuration features a double-flanged outer ring and a single-flanged inner ring with a loose rib, allowing it to carry heavy radial loads while locating the shaft axially in both directions. It resists vibration, heat, gear oil and temperature extremes, and performs reliably in constant commercial truck service.
OEM WG9003320309 • NUP309E cylindrical roller bearing • 45 × 100 × 25 mm • High radial load capacity • Direct OEM fit
This NUP309E cylindrical roller bearing is a critical internal component in the transmission of SINOTRUK Howo trucks. It is installed on the intermediate shaft of HW19710 and HW13710 gearbox families, supporting the shaft under heavy gear loads while holding its axial position during torque reversal and gear changes.
The bearing is manufactured to exact OEM dimensions. Bore diameter 45 mm, outer diameter 100 mm and width 25 mm match the factory specification, while the NUP design with double-flanged outer ring and inner ring with loose rib provides two-direction axial location. Precision-ground raceways and a hardened cage ensure smooth roller guidance under load.
Common signs that a NUP309E bearing needs replacement include rumbling or growling noises from the gearbox, vibration through the gear lever, difficulty selecting gears, metal debris or grey sludge in the transmission oil, and excessive shaft play detected during inspection or rebuild.
Fitting a new WG9003320309 Cylindrical Roller Bearing NUP309E restores correct shaft support, quiet gear meshing and reliable torque transfer. It is a durable repair that protects the intermediate shaft, gears and gearbox housing from accelerated wear and misalignment.
This NUP309E bearing is designed for SINOTRUK Howo trucks, with primary fitment in the intermediate shaft positions of HW19710, HW13710 and related 10-speed and 12-speed gearboxes used across the A7, T7H, HOWO 371 and HOWO 380 series. It is a direct OE replacement for the original bearing.
The bearing is essential in applications where reliable shaft support and axial location are critical, such as long-haul transport, construction, mining and municipal service. In these duties, it must resist heavy radial loads from gear meshing, vibration, heat, contaminated oil and frequent torque reversals.
When replacing the bearing, it is recommended to inspect the intermediate shaft journal, housing bore, adjacent bearings, gears and transmission oil for wear or damage. This part is designed to work with the factory gearbox assembly for correct fit and reliable operation.
For fleets with multiple HOWO trucks, standardising on the WG9003320309 Cylindrical Roller Bearing NUP309E simplifies transmission maintenance and ensures the correct bearing is available for scheduled gearbox service or emergency rebuilds.
Replacing the WG9003320309 Cylindrical Roller Bearing NUP309E is a precision gearbox repair that requires a press, proper bearing adapters and a clean workshop. This work should be performed by a qualified technician during transmission removal or rebuild.
Remove the intermediate shaft assembly, press the old bearing off the shaft and out of the housing, and inspect the shaft journal and housing bore for wear, scoring or fretting. Clean all mating surfaces thoroughly before fitting the new bearing.
Press the new NUP309E bearing onto the shaft and into the housing using the correct adapters, applying force only to the ring being fitted. Confirm that the bearing seats fully, the shaft rotates freely and the axial location is correct for the NUP configuration.
Reassemble the gearbox, refill with the specified transmission oil and road test through all gears. During routine service, monitor for abnormal noise, vibration or metal debris in the oil and replace the bearing whenever the gearbox is opened for major repair.
This NUP309E bearing is manufactured in an ISO 9001-certified facility using high-carbon chromium bearing steel and a hardened cage. Incoming steel is checked for hardness, chemical composition and cleanliness before production begins.
Each bearing is ground, honed and assembled on precision equipment, then inspected for bore diameter, outer diameter, width, internal clearance, raceway finish and cage integrity. Every batch is dimensionally checked, and samples receive a rotation and noise test before packing.
Batch samples undergo thermal cycling, vibration, salt spray and fatigue testing to confirm long-term reliability in heavy-duty truck use. These checks help ensure the bearing performs in the tough conditions Howo gearboxes face every day.
This NUP309E bearing is covered by a 12-month warranty against material and workmanship defects. Strict quality control means every unit matches the fit, function and durability of the original factory part.
The WG9003320309 Cylindrical Roller Bearing NUP309E is a vital component for maintaining correct intermediate shaft support, quiet gear meshing and reliable torque transfer on your Howo truck. A worn or damaged bearing can cause gearbox noise, vibration, difficult shifting and costly damage to the shaft, gears and housing.
Manufactured from quality bearing steel with precision-ground raceways and the NUP axial location design, this bearing offers dependable performance and long service life. Its exact OEM dimensions keep installation simple and work with the factory gearbox assembly.
Fleet operators benefit from reduced gearbox repair downtime, lower maintenance costs and improved vehicle availability. Owner-operators gain confidence from a bearing that meets strict OEM standards and is backed by a 12-month warranty.
Order the WG9003320309 Cylindrical Roller Bearing NUP309E today and keep your SINOTRUK Howo gearbox running quiet, strong and reliable for years to come.
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