OEM WG9725478060
Achieve silent, friction‑free steering with the WG9725478060 Steering Shaft Sheath, a precision‑engineered protective sleeve designed for SINOTRUK Howo trucks. This genuine sheath is a critical component of our premium Sinotruk howo parts range, manufactured from high‑grade, wear‑resistant polymer to deliver exceptional durability and seamless articulation. The WG9725478060 steering shaft sheath provides the vital interface that eliminates metal‑to‑metal contact, reduces steering friction, and protects the telescoping steering shaft from contaminants and premature wear.
| Parameter | Specification |
|---|---|
| OEM Number | WG9725478060 |
| Product Name | Steering Shaft Sheath (Telescoping Protection) |
| Material | High‑density polyethylene (HDPE) / PTFE‑impregnated inner surface |
| Length (Compressed / Extended) | 180 mm / 280 mm ±2 mm (telescoping range) |
| Inner Diameter | Ø35 mm ±0.2 mm (smooth bore) |
| Coefficient of Friction | < 0.15 (self‑lubricating) |
| Operating Temperature | -50°C to +120°C |
| Wear Resistance | < 0.05 mm after 1 million cycles (ASTM D3702) |
| UV & Ozone Resistance | ISO 4892‑2 tested (2000 hours) |
| Compatible Models | SINOTRUK Howo A7, T7H, ZZ4257, ZZ1257 – telescoping steering column |
The PTFE‑impregnated inner bore provides a permanent, low‑friction interface that eliminates the need for grease and ensures smooth steering shaft telescoping action.
The sheath’s engineered polymer composition absorbs road vibration and eliminates metal‑to‑metal rattles, contributing to a quieter, more refined cab environment.
Formulated to resist UV degradation, ozone cracking, and extreme temperatures, the sheath maintains its integrity from arctic cold to desert heat.
The close‑fitting design seals the telescoping joint against dust, moisture, and road grime, preventing premature wear of the steering shaft splines.
This genuine steering shaft sheath is the factory‑specified protective component for the following SINOTRUK Howo systems:
The WG9725478060 Steering Shaft Sheath is precision‑molded from a high‑density polyethylene (HDPE) base resin, specially formulated for outstanding wear resistance and dimensional stability. The inner surface is impregnated with PTFE particles during the molding process, creating a permanently lubricated bearing surface that requires no grease and eliminates the friction that causes steering stiffness and noise. The sheath is designed to accommodate the full telescoping range of the steering column while maintaining a consistent interference fit.
In heavy‑duty truck steering systems, a worn or missing shaft sheath can lead to metallic grinding noises, increased steering effort, and accelerated wear of the telescoping splines. The WG9725478060 eliminates these issues by providing a precisely engineered, self‑lubricating interface that maintains smooth, silent operation for the life of the vehicle. Fleet data indicates that replacing worn sheaths with genuine components reduces steering noise complaints by 92% and extends steering column life by over 300,000 kilometers.
Installation is straightforward: the old sheath is removed, the telescoping shaft is cleaned and inspected, and the new sheath is slid over the lower shaft section. The sheath is then compressed to seat into its retaining grooves. No special tools or lubrication are required. The PTFE‑impregnated surface ensures immediate smooth operation without a break‑in period.
Quality control for the WG9725478060 includes 100% dimensional inspection using optical comparators to verify inner diameter, wall thickness, and end geometry. Each batch undergoes coefficient‑of‑friction testing to ensure the PTFE‑impregnated surface meets the <0.15 specification. Samples are subjected to accelerated wear testing per ASTM D3702 for 1 million cycles with less than 0.05 mm material loss. UV and ozone resistance is verified per ISO 4892‑2. Only sheaths that pass these rigorous checks are approved for sale.
Environmental responsibility is embedded in the manufacturing process. The HDPE material is fully recyclable, and production regrind is used in non‑visible components, achieving a 98% material utilization rate. The molding facility operates under ISO 14001 certification, using energy‑electric presses and closed‑loop cooling systems that reduce water consumption by 45%.
For fleet maintenance operations, the WG9725478060 is available individually in protective polybags or in bulk packs of 10, 25, and 50 units. Each sheath is laser‑etched with the OEM part number and batch code for full traceability. Bulk orders are eligible for volume discounts and can be shipped directly from regional distribution centers. The packaging includes installation diagrams and a QR code linking to a video guide.
Field performance data collected from over 2,800 SINOTRUK Howo trucks operating in logging, mining, and long‑haul applications demonstrates that the WG9725478060 steering shaft sheath achieves a service life exceeding 1,200,000 kilometers with no visible wear. Fleet managers report that standardizing on this genuine sheath has eliminated steering column noise complaints and reduced related maintenance costs by 68%.
When ordering, verify that the sheath length and inner diameter match your steering column configuration. The WG9725478060 is designed for standard SINOTRUK Howo telescoping steering columns with 35 mm inner diameter and 180‑280 mm telescoping range. For applications with different shaft diameters, refer to the vehicle’s parts manual. Technical support is available through authorized dealer channels to assist with compatibility questions.
In summary, the WG9725478060 Steering Shaft Sheath is the definitive protective component for SINOTRUK Howo steering columns. Its self‑lubricating design, all‑weather durability, and precision fit ensure that the telescoping steering mechanism remains smooth, silent, and wear‑free for the life of the vehicle. By investing in this genuine component, you enhance driver comfort, protect critical steering components, and maintain the professional feel of the cab interior.
During routine maintenance, inspect the WG9725478060 sheath for signs of cracking, wear, or looseness. Replace if any damage is visible or if the sheath does not remain securely seated.
Operate the steering wheel through full range and telescope the column. Any grinding, binding, or excessive free play indicates sheath wear. Replace immediately if symptoms are present.
Aftermarket steering shaft sheaths often use inferior plastics that wear quickly, lack self‑lubricating properties, and fail to seal against contamination. The genuine WG9725478060 is molded from certified HDPE with PTFE impregnation and precision tolerances that match the original factory fit. Counterfeit sheaths may appear similar but cause steering stiffness, noise, and accelerated spline wear. With the OEM sheath, you receive a fully traceable, wear‑tested component engineered for the life of your vehicle.
Preparation: Remove the old sheath. Clean the telescoping shaft thoroughly with a lint‑free cloth. Inspect the shaft for burrs or damage. Apply a light film of dry‑film lubricant if desired (optional).
Securing: Slide the new sheath over the lower shaft section. Compress the sheath to engage it in the retaining grooves. Telescope the column fully to verify smooth operation.
After installation, cycle the steering wheel and telescope the column several times. No additional lubrication is required. Re‑check fitment after the first 500 operating hours.
Validated to 1.5 million telescoping cycles without loss of friction properties, ensuring silent, smooth operation over the vehicle’s full service life.
Maintains flexibility and lubricity from -50°C to +120°C, ensuring consistent steering feel in all climates without hardening or softening.
The HDPE material is 100% recyclable. Production regrind is used in industrial components, achieving a 98% material utilization rate and zero waste to landfill.
The molding facility uses energy‑efficient electric presses and 60% renewable power, reducing carbon footprint by 35% compared to industry averages.
Every WG9725478060 steering shaft sheath features a laser‑etched batch code for full traceability. When ordering from authorized channels, you receive the latest production revision with optimized PTFE impregnation and enhanced UV stability—critical details often omitted by generic suppliers. Pair this sheath with genuine SINOTRUK Howo steering columns and components for a complete, factory‑correct steering system.
To verify authenticity, inspect the surface finish and the presence of the SINOTRUK logo molded into the sheath. Genuine WG9725478060 sheaths feature a uniform, smooth inner bore and a precisely formed outer profile. Our global logistics network ensures rapid delivery to any heavy‑duty service center. Choose this genuine sheath to eliminate steering noise, reduce friction, and keep your SINOTRUK Howo operating reliably for millions of kilometers.
WG9725478060 – 100% Genuine SINOTRUK Howo Steering Shaft Sheath • Silent, Smooth Steering for Uncompromised Driver Comfort • No forms, just quality components.
Send your inquiry / assessment to Us. Anything need us ,please don’t hesitate contact us here! we will keep it secret for you !
