| No. | Part No. | Name |
|---|---|---|
| 1 | 811W41313-0018 | Right Combination Bracket |
| 2 | 811W41313-0019 | Left Combination Bracket |
| 3 | YZ962651390040 | Frame Assembly (R3900/1025/Four‑Airbag/Dual Tank) |
| 4 | ZQ1811480TF6 | Hexagon Flange Bolt with Serrations M14*1.5 |
| 5 | ZQ1811420TF6 | Hexagon Flange Bolt with Serrations M14*1.5 |
| 6 | ZQ1811430TF6 | Hexagon Flange Bolt with Serrations M14*1.5 |
| 7 | ZQ1811450TF6 | Hexagon Flange Bolt with Serrations M14*1.5 |
| 8 | ZQ325141T3F6 | Hexagon Flange Nut with Serrations M14*1.5 |
| 9 | ZQ325141T3F6 | Hexagon Flange Nut with Serrations M14*1.5 |
| 10 | WG9925522112 | Front Spring Rear Bracket Assembly |
| 11 | ZQ1811445TF6 | Hexagon Flange Bolt with Serrations M14*1.5 |
| 12 | ZQ1811445TF6 | Hexagon Flange Bolt with Serrations M14*1.5 |
| 13 | WG9925933246 | Crossmember |
| 14 | ZQ151B18160TF6 | Hexagon Head Bolt M18*1.5 |
| 15 | ZQ361B181T3F6 | Type 2 Hexagonal Nut M18*1.5 |
The Right Combination Bracket is a precision‑formed steel component that integrates multiple mounting points for chassis and body attachments on the right side. It is engineered to provide structural support and alignment for the overall Frame Assembly, ensuring accurate fitment of adjoining parts.
The Left Combination Bracket is the mirror‑image counterpart, providing identical structural support for the left side of the chassis. Together with the right bracket, it ensures balanced load distribution and precise alignment across the Frame Assembly, contributing to vehicle stability.
This Frame Assembly is the main structural backbone of the C7H, featuring a 3900mm wheelbase, 1025mm width, four‑airbag suspension mounting, and dual fuel tank provision. It is manufactured from high‑tensile steel with precision‑drilled holes and reinforced crossmembers, delivering exceptional strength and durability.
These heavy‑duty M14 fine‑thread bolts feature serrations under the head that provide a self‑locking action, preventing loosening under severe vibration. They are used extensively throughout the Frame Assembly to secure brackets, crossmembers, and suspension components, ensuring a rigid and durable connection.
The matching serrated flange nut completes the M14 fastening set, providing a vibration‑proof clamp. Its flanged design distributes clamping pressure evenly, protecting the Frame Assembly components from galling and ensuring consistent torque retention over the vehicle’s lifetime.
This bracket assembly supports the rear end of the front leaf spring, transferring load from the suspension to the frame. It is manufactured from heavy‑gauge steel and features precision mounting holes that align perfectly with the Frame Assembly, ensuring accurate axle positioning and ride height.
The Crossmember is a structural brace that reinforces the Frame Assembly by connecting the two main longitudinal rails. It provides lateral stiffness and acts as a mounting platform for ancillary equipment, such as air tanks and exhaust brackets, while also helping to resist torsional forces during cornering and heavy braking.
These larger M18 fine‑thread bolts are used for the most critical structural connections, such as securing the frame rails to suspension pivots. Their increased diameter and fine pitch provide exceptional clamping force and resistance to fatigue, making them ideal for high‑load areas of the Frame Assembly.
The Type 2 nut is a taller nut that offers increased thread engagement for the M18 bolts, providing superior resistance to loosening under extreme vibration. Its design ensures that the high‑strength connections in the Frame Assembly remain secure, even in the most demanding operating conditions.
Our Frame Assembly is manufactured to Sinotruk’s exacting standards, using high‑tensile steel and precision‑machined components. Every bracket, bolt, and nut is designed to work together, ensuring a rigid, durable, and perfectly aligned chassis structure.
The Frame Assembly is built to withstand the harshest conditions, with corrosion‑resistant coatings and heavy‑gauge materials. The serrated fasteners provide a locking action that resists loosening, ensuring the chassis remains tight and reliable for millions of kilometres.
We supply every bracket, bolt, and nut required for a full Frame Assembly installation. The kit includes multiple lengths of M14 flange bolts, M14 flange nuts, M18 bolts, and M18 nuts, ensuring you have the correct fasteners for every mounting point without the need for additional purchases.
This Frame Assembly is specifically configured for 4×2 and 6×4 C7H variants with four‑airbag suspension and dual fuel tanks. Its design accommodates heavy payloads and demanding driving conditions, making it ideal for long‑haul and distribution operations.
The Frame Assembly is the foundation upon which the entire truck is built. It must be strong enough to support the engine, transmission, suspension, and payload, while also providing precise mounting points for all other components. This genuine Sinotruk kit ensures that your C7H’s chassis meets the original factory specifications.
The frame rails are made from high‑strength low‑alloy steel with a yield strength of over 700 MPa, offering an excellent strength‑to‑weight ratio. The crossmember adds lateral rigidity, reducing flex during cornering and preventing stress fractures in the frame rails. The Frame Assembly is designed to absorb and distribute loads evenly, ensuring long‑term structural integrity.
The left and right combination brackets serve as multi‑purpose mounting plates, attaching the cab, fuel tanks, and other auxiliaries to the frame. Their design incorporates reinforcing ribs that prevent bending under heavy loads. They are bolted directly to the frame rails using the supplied serrated flange bolts, which provide a permanent, vibration‑proof connection.
The front spring rear bracket assembly is a critical suspension mounting point that supports the rear of the front leaf spring. It is forged from high‑carbon steel and heat‑treated to resist wear and impact. Its precise hole alignment ensures that the spring is correctly positioned, contributing to proper wheel alignment and tyre life.
The frame assembly is delivered with all necessary fasteners pre‑sized and categorised. The M14 serrated flange bolts are available in lengths of 20mm, 30mm, 35mm, 45mm, 48mm, and 80mm, allowing you to choose the correct bolt for each application. The M18 bolts are used where extra clamping force is required, such as for the main suspension pivots.
The Frame Assembly kit is particularly useful for fleet owners who need to replace a damaged frame due to corrosion, accident, or fatigue. Rather than repairing sections, a complete replacement with this genuine kit ensures that the vehicle returns to factory strength and alignment, reducing the risk of future structural failures.
Installation of the Frame Assembly requires specialised equipment, including heavy‑duty jacks, alignment tools, and a torque wrench capable of handling the high torque values (typically 180–220 Nm for M14 bolts). We recommend that installation be carried out by a trained chassis specialist to ensure correct alignment and torque.
The four‑airbag mounting provisions are integrated into the frame, with pre‑drilled holes and reinforcement plates that ensure the airbags are correctly positioned. This design minimises stress concentrations and improves the longevity of the air suspension system.
The Frame Assembly also includes mounting points for the dual fuel tanks, with brackets and straps (not included in this kit) that can be attached directly. The crossmember provides a convenient location for routing air lines and electrical harnesses, keeping them protected and organised.
The use of serrated fasteners is a key advantage of this Frame Assembly kit. Unlike standard bolts, the serrations bite into the mating surface, providing a mechanical lock that prevents the nut or bolt from backing out. This is especially important in the high‑vibration environment of a heavy truck, where conventional fasteners can loosen over time.
All metal components in the Frame Assembly are protected by an E‑coat primer followed by a powder‑coat finish, providing excellent resistance to rust and stone chips. This ensures that the frame remains structurally sound and visually acceptable for many years, even in harsh winter conditions with road salt.
We recommend that the Frame Assembly be inspected after the first 5000 km of driving to check that all bolts remain tight. Re‑torquing the fasteners to specification is a simple but important step to ensure long‑term reliability.
We back our Frame Assembly with a 12‑month warranty against manufacturing defects. Our technical support team is available to assist with any installation or compatibility questions.
We ship worldwide with tracking. Expedited shipping is available for urgent orders. Use the Send Email or Get Quotation buttons to request a customised quote for your fleet.
Choosing a genuine Frame Assembly ensures that your C7H maintains its original structural integrity and handling characteristics. Aftermarket frames may not have the same material strength or precise alignment, leading to poor ride quality and premature fatigue.
The crossmember is designed with service holes that allow easy access to the bolts and nuts, making installation and future maintenance more convenient. This is a small but thoughtful feature that reflects Sinotruk’s attention to serviceability.
We are committed to providing the highest quality components and exceptional customer service. Choose our Frame Assembly for peace of mind.
Don’t compromise on chassis strength. Replace your aging or damaged frame with our genuine kit and enjoy the confidence that comes with a fully tested, factory‑fresh Frame Assembly.
We maintain a large stock to ensure fast dispatch, even for bulk orders. Contact our sales team for volume pricing and customised logistics solutions.
Thank you for considering our Frame Assembly for your Sitrak C7H. We are confident that our genuine OEM product will deliver the reliability and performance you expect from Sinotruk.
The Frame Assembly is the backbone of your truck’s structure. Investing in genuine parts ensures that your vehicle remains safe, reliable, and capable of handling the toughest loads.
We provide a comprehensive installation guide with torque specifications and alignment data. The kit is designed for professional installation, with all components clearly labelled.
We are committed to helping you maintain your C7H in peak condition. Our technical helpline is staffed by engineers with deep knowledge of the chassis systems.
With proper installation and regular inspection, this Frame Assembly will provide years of dependable service, keeping your truck’s chassis rigid and aligned.
Upgrade your C7H with the genuine Frame Assembly – the smart choice for reliability, safety, and long‑term value.
We are proud to be a trusted supplier of OEM Sinotruk parts. Contact us today to order your Frame Assembly and experience the quality that only genuine components can deliver.
Don’t wait until structural weakness compromises your safety. Replace your aging frame with our genuine kit and enjoy the peace of mind that comes with a fully tested, factory‑fresh solution.
We are here to support your fleet’s needs with fast shipping and competitive pricing. Use the buttons above to request a quote or place your order.
The Frame Assembly is an essential part of your truck’s structural integrity. Choose genuine Sinotruk parts for the best results.
We are confident that our genuine Frame Assembly will exceed your expectations. Order today and keep your C7H strong and reliable.
We are proud to offer this high‑quality Frame Assembly kit, which includes every component needed for a complete chassis replacement. It is the most comprehensive solution available for the Sitrak C7H.
Our Frame Assembly is built to meet the highest standards of quality and durability. You can trust it to perform when you need it most.
We look forward to serving your Sitrak C7H needs. Thank you for choosing our genuine parts for your vehicle.
We are committed to providing the best service and quality. Trust our Frame Assembly to deliver the performance you expect.
Order now and ensure your truck is equipped with the best chassis structure available. We are here to support you every step of the way.
Our online catalog provides comprehensive access to genuine SINOTRUK parts for all major vehicle lines — including HOWO, Sitrak, Steyr, and Yellow River series trucks. You can browse detailed specifications, original part numbers, and exploded-view diagrams for every assembly. Whether you are performing routine maintenance or planning a major overhaul, the catalog helps you quickly identify the correct components for your vehicle. When you become a SINOTRUK customer, we offer complimentary full‑access catalog services, ensuring you always have the latest product data and interchangeability information at your fingertips to support efficient fleet management and accurate parts ordering.
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