The spindle bush is the unsung hero of your vehicle’s steering and suspension system, responsible for maintaining precise alignment and reducing friction. The W3502040F010 SPINDLE BUSH(HOWO) from HOWO is engineered to deliver exceptional wear resistance, tight clearances, and consistent performance, ensuring that your front axle operates smoothly and safely. As a critical Howo/Sitrak truck parts component, this bush is manufactured from high-strength bronze alloy, precision-machined to exacting tolerances, and impregnated with a self-lubricating compound that reduces friction and extends service life. Its robust design absorbs radial and axial loads, maintaining kingpin alignment and preventing premature tire wear. Whether you are rebuilding a front axle or replacing worn bushes, the W3502040F010 guarantees a perfect fit, reduced steering play, and enhanced vehicle stability – making it the trusted choice for workshops and fleet operators worldwide.
The W3502040F010 Spindle Bush sits between the steering knuckle and the axle beam, providing a low-friction bearing surface for the kingpin. Its primary role is to maintain precise alignment of the wheel while allowing smooth steering articulation. A worn bush leads to excessive play, uneven tire wear, and compromised handling, especially under heavy loads. HOWO has designed this bush with an optimized clearance and a unique spiral oil groove that distributes lubricant evenly, reducing friction and heat generation. The use of a high-leaded bronze alloy ensures excellent conformability and embedability, allowing the bush to absorb shock loads without seizing. With the W3502040F010, you restore the factory steering precision, improve tire life, and enhance overall driving safety.
Zero Play
Precision Fit
Self-Lube
Reduced Friction
OEM Grade
Genuine HOWO
Shock Resistant
Heavy-Duty
Accurate dimensional data is essential for proper selection and installation. The W3502040F010 is manufactured to exacting OEM standards, guaranteeing a seamless fit in your HOWO front axle assembly.
| Parameter | Specification | Detail |
|---|---|---|
| OEM Number | W3502040F010 | Exact Match |
| Part Name | SPINDLE BUSH(HOWO) | HOWO Genuine |
| Brand | HOWO | Original Equipment |
| Application | HOWO T7H / A7 / Front Axle | Kingpin bearing |
| Material | High-leaded bronze (SAE 660) | Self-lubricating |
| Inner Diameter | 40 mm (finished) | Reamed to size |
| Outer Diameter | 50 mm | Press-fit into axle |
| Length | 45 mm | Overall dimension |
| Lubrication | Graphite impregnated + oil groove | Long-lasting |
| Hardness | 80-100 HB | Wear-resistant |
| Operating Temp | -40°C to +120°C | Wide range |
| Warranty | 12 Months | Manufacturer Guarantee |
The W3502040F010 Spindle Bush is crafted from a specialized SAE 660 bearing bronze, known for its excellent anti-friction properties and fatigue resistance. The material is centrifugally cast to ensure a uniform, porosity-free structure, then precision-machined to achieve the exact inner and outer diameters with a surface finish of Ra 0.8. The bush features a helical oil groove that distributes grease or gear oil evenly across the bearing surface, preventing dry-start scuffing.
The outer diameter is designed with a slight interference fit, ensuring that the bush remains securely in the axle eye during operation. The inner diameter is finished with a reamer to provide the correct clearance for the kingpin, allowing smooth rotation without excessive play. Each bush is inspected for dimensional accuracy and concentricity using air gauges, ensuring that it meets HOWO’s stringent quality standards. This meticulous engineering translates into a spindle bush that delivers consistent performance, reduced steering effort, and extended axle life.
The W3502040F010 is specifically designed for HOWO heavy-duty trucks with front axles, including T7H, A7, and other models. It is used in pairs (upper and lower) to support the kingpin in the steering knuckle. Its dimensions match the original factory parts, allowing for a straightforward replacement without modifications.
This bush is also compatible with many Sinotruk and other commercial vehicles that share the same axle architecture. To confirm fitment, always cross-reference the OEM number on your existing bush with W3502040F010. If they match, this component will integrate seamlessly. Keeping these bushes in your spare parts inventory enables rapid front axle overhauls, minimizing downtime and ensuring precise steering geometry.
HOWO T7H
Primary Fitment
HOWO A7
Also Compatible
Front Axle
Kingpin Bearing
Direct Replacement
No Machining
Replacing worn spindle bushes with the W3502040F010 restores the front axle to factory specifications. The precise clearance eliminates steering wander and play, providing a more direct and responsive steering feel. The reduced friction also lowers steering effort, especially at low speeds, improving driver comfort and reducing fatigue.
The self-lubricating properties of the bronze alloy reduce the reliance on regular greasing, though periodic lubrication is still recommended. The improved alignment minimizes uneven tire wear, extending tire life and reducing operating costs. For fleet operators, using genuine HOWO bushes ensures consistent handling across the fleet, reducing the risk of accidents and costly downtime. By investing in the W3502040F010, you ensure that your vehicle steers true and handles loads with confidence.
Installing the W3502040F010 Spindle Bush requires careful attention to detail. Begin by safely raising the front axle and removing the steering knuckle. Press out the old bushes using a suitable drift and press. Clean the axle eye thoroughly, removing any burrs, rust, or old lubricant.
Chill the new bush in a freezer for about 30 minutes to slightly reduce its outer diameter, facilitating installation. Apply a thin layer of anti-seize compound to the outer surface of the bush. Press the bush into the axle eye using a hydraulic press, ensuring it is fully seated and aligned with any oil holes. After installation, ream the inner diameter to the specified final size using a precision reamer, taking care to maintain concentricity. Install the kingpin and check for free rotation without excessive play. Lubricate the bush with the recommended grease before reassembling the knuckle. With correct installation, the W3502040F010 will provide years of reliable service.
Pro Tip: Always replace both upper and lower bushes as a set, even if only one appears worn. Uneven wear can affect kingpin alignment and lead to premature failure of the new bush. The W3502040F010 is available individually, but we recommend buying in pairs.
Genuine HOWO components are engineered to the highest standards, and the W3502040F010 Spindle Bush is no exception. Aftermarket bushes often use inferior bronze alloys with poor lubricating properties, leading to rapid wear and premature failure. HOWO’s bush is manufactured using the same material specification and machining processes as the original equipment, guaranteeing a perfect fit and reliable performance.
By choosing the W3502040F010, you benefit from HOWO’s extensive quality control, which includes material analysis, hardness testing, and dimensional verification. This ensures that the bush maintains the correct clearance and lubrication characteristics throughout its service life. Moreover, genuine parts are backed by a comprehensive warranty and supported by HOWO’s global network, giving you confidence in your purchase.
OEM Authentic
Factory Quality
Long Service
Extended Life
Global Standard
Trusted Worldwide
Q: Which vehicles use the W3502040F010?
A: It is used in HOWO T7H, A7, and other models with the standard front axle, as well as many Sinotruk trucks.
Q: What are the symptoms of worn spindle bushes?
A: Loose or wandering steering, uneven tire wear, shimmy or vibration in the front end, and clunking noises when turning are common signs.
Q: Do I need to ream the bush after installation?
A: Yes, it is recommended to ream the bush to the final size after pressing it into the axle to ensure correct clearance with the kingpin. The W3502040F010 is supplied slightly undersized for this purpose.
Q: How do I verify the correct part?
A: Check the OEM number stamped on your existing bush. If it matches W3502040F010, this is the exact replacement. Consult your vehicle’s parts manual for confirmation.
Order your W3502040F010 Spindle Bush today! Browse our complete selection of genuine HOWO and Sinotruk steering and suspension parts at Howo/Sitrak truck parts and keep your front axle precise and reliable.
The W3502040F010 Spindle Bush from HOWO is a testament to precision engineering and material excellence. By choosing this genuine component, you ensure that your vehicle’s steering remains tight, responsive, and safe, while prolonging tire life and reducing operating costs. Whether you are a professional mechanic or a fleet manager, this bush offers the durability and exact fit required for modern heavy-duty trucks. Trust HOWO – the benchmark for excellence in heavy-duty truck components – and experience the difference that genuine quality makes.
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