| No. | Part No. | Name |
|---|---|---|
| 1 | WG9917511028 | Saddle Left Connecting Plate |
| 2 | WG9917511029 | Saddle Right Connecting Plate |
| 3 | 752W41210-0160 | Rear Crossmember |
| 4 | 712W41208-0001 | Rear Crossmember Connecting Plate |
| 5 | 712W41200-5222 | V‑type Tubular Crossmember Assembly |
| 6 | 711W41210-5073 | Crossmember Assembly |
| 7 | WG9727517013 | Axe‑shaped Crossmember |
| 8 | WG9717511004 | Right Connecting Support |
| 9 | WG9717511005 | Left Connecting Support |
| 10 | YZ962651390042 | Rear Frame Longitudinal Rail |
| 11 | YZ962651390041 | Left Frame Longitudinal Rail |
| 12 | WG9917511027 | Right Lower Connecting Plate |
| 13 | WG9917511026 | Right Upper Connecting Plate |
| 14 | WG9917511025 | Left Lower Connecting Plate |
| 15 | WG9917511024 | Left Upper Connecting Plate |
| 16 | WG9917511023 | Spacer Plate |
| 17 | Q4501434 | Round Head Rivet |
| 18 | ZQ1811440TF2 | Hexagon Flange Bolt with Serrations M14*1.5 |
| 19 | ZQ325141T3F2 | Hexagon Flange Nut with Serrations M14*1.5 |
| 20 | ZQ151B18185TF6 | Hexagon Head Bolt M18*1.5 |
| 21 | ZQ361B181T3F6 | Type 2 Hexagonal Bolt M18*1.5 |
| 22 | ZQ1811455TF2 | Hexagon Flange Bolt with Serrations M14*1.5 |
| 23 | Q218B1450TF2 | Hexagon Socket Head Cap Screw |
| 24 | ZQ324141T3F2 | Hexagon Flange Nut with Serrations M14 |
| 25 | ZQ1811445TF2 | Hexagon Flange Bolt with Serrations M14*1.5 |
| 26 | ZQ1811435TF2 | Hexagon Flange Bolt with Serrations M14*1.5 |
The Saddle Left Connecting Plate is a precision‑formed steel bracket that attaches the fifth wheel saddle to the left side of the Frame Assembly. It is engineered to distribute the load from the trailer evenly across the chassis rails, ensuring stable towing performance.
The Saddle Right Connecting Plate is the mirror‑image counterpart, providing balanced support for the fifth wheel saddle on the right side. Together with the left plate, it ensures symmetrical load transfer within the Frame Assembly, crucial for safe and stable trailer articulation.
The Rear Crossmember is a structural beam that connects the rear ends of the frame rails, providing torsional rigidity and a mounting point for the rear suspension and towing equipment. Its box‑section design offers high strength with minimal weight, contributing to the overall durability of the Frame Assembly.
These connecting plates reinforce the joints between the rear crossmember and the longitudinal rails, increasing the structural integrity of the Frame Assembly. They are laser‑cut and drilled for precise alignment with the chassis fasteners.
This V‑shaped tubular crossmember is a lightweight yet highly rigid structural element that resists chassis twist. Its unique geometry enhances the Frame Assembly’s resistance to lateral forces during cornering, improving vehicle stability and handling.
The Crossmember Assembly is a general‑purpose structural brace used at various points along the Frame Assembly to maintain rail spacing and provide mounting points for auxiliary equipment. Its modular design allows for easy integration of additional components.
This axe‑shaped crossmember provides exceptional lateral stiffness while accommodating driveline components. Its sculpted design allows for clearance of the driveshaft and exhaust, making it an integral part of the Frame Assembly for heavy‑duty applications.
The Right Connecting Support is a structural bracket that ties the frame rail to the suspension or body mounts on the right side. It is manufactured from high‑tensile steel and is designed to withstand the high loads encountered during heavy braking and cornering.
The Left Connecting Support mirrors the right support, providing balanced structural reinforcement on the driver side. Both supports work together to maintain the Frame Assembly’s alignment and distribute forces evenly across the chassis.
The Rear Frame Longitudinal Rail is a high‑strength steel beam that forms the rear section of the chassis. It is designed to accommodate the rear axle suspension and mounting points, ensuring the Frame Assembly provides a solid foundation for the vehicle’s rear structure.
The Left Frame Longitudinal Rail is the primary structural beam on the driver side, running the full length of the Frame Assembly. It provides the main load‑bearing surface for the cab, engine, and suspension components, and is manufactured from high‑yield steel for maximum strength.
This plate connects the lower portion of the right frame rail to crossmembers and brackets, providing additional structural reinforcement. Its precise fitment ensures that the Frame Assembly maintains its dimensional accuracy under load.
The Right Upper Connecting Plate reinforces the upper joint between the frame rail and the crossmember, distributing bending forces and preventing stress concentrations within the Frame Assembly.
Mirroring the right lower plate, this component reinforces the left side lower connections, ensuring symmetric structural behaviour across the Frame Assembly.
The Left Upper Connecting Plate completes the set of four connecting plates, providing balanced reinforcement for the upper left joint. Together, these plates ensure the Frame Assembly is torsionally stiff and resistant to fatigue.
The Spacer Plate is a precision‑ground steel shim used to adjust the height or alignment of mounting points within the Frame Assembly. It ensures that all components are correctly positioned, preventing misalignment and premature wear.
The Round Head Rivet is a permanent fastener used to join selected components of the Frame Assembly. Its domed head provides a smooth finish, and the rivet is made from corrosion‑resistant steel, offering a reliable, maintenance‑free connection.
These high‑strength 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.
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 hexagonal bolt is a taller nut offering 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.
This socket head cap screw provides a clean, recessed fastening solution for applications where a flush finish is required. Its high‑strength alloy steel construction and precise thread ensure reliable clamping within the Frame Assembly.
This variant of the M14 serrated flange nut is used with the M14 bolts in areas where the standard M14*1.5 nut is not applicable. Its design offers the same vibration‑proof locking and even load distribution as the fine‑thread version.
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, rail, crossmember, and fastener required for a full Frame Assembly installation. The kit includes multiple lengths of M14 flange bolts, M14 flange nuts, M18 bolts, and rivets, ensuring you have the correct hardware for every mounting point without the need for additional purchases.
This Frame Assembly is specifically configured for C7H tractors with fifth wheel couplings and heavy payloads. Its robust construction accommodates demanding driving conditions, making it ideal for long‑haul and distribution operations.
The Frame Assembly is the structural foundation of the Sitrak C7H, supporting the engine, transmission, cab, and all auxiliary systems. It must be strong enough to handle the heaviest loads while maintaining precise alignment for proper driveline operation. This genuine Sinotruk kit ensures that your truck’s chassis meets the original factory specifications.
The longitudinal rails are made from high‑strength low‑alloy steel with a yield strength exceeding 700 MPa, providing an excellent strength‑to‑weight ratio. The crossmembers and connecting plates are strategically placed to resist bending and torsional forces, ensuring the Frame Assembly remains rigid and distortion‑free even under extreme loads.
The saddle connecting plates are specifically designed for fifth wheel mounting, distributing the vertical and lateral loads from the trailer evenly across the chassis. Their precise geometry ensures that the fifth wheel is perfectly aligned, reducing tyre wear and improving handling.
The V‑type tubular crossmember is a lightweight yet highly effective structural element that resists chassis twist, enhancing vehicle stability during cornering. Its tubular construction offers high torsional rigidity with minimal weight, contributing to improved fuel efficiency.
All fasteners in the Frame Assembly kit are selected for their resistance to loosening under vibration. The serrated flange bolts and nuts provide a mechanical lock that prevents the hardware from backing out, ensuring that the chassis remains securely assembled over the vehicle’s lifetime.
The rivets provide permanent, tamper‑proof connections for selected joints, eliminating the risk of loosening. Their corrosion‑resistant coating ensures long‑term reliability, even in harsh environmental conditions.
The Frame Assembly kit is ideal for replacing a damaged or corroded chassis due to accident, fatigue, or age. 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 high torque values. We recommend that installation be carried out by a trained chassis specialist to ensure correct alignment and torque.
The Frame Assembly also includes mounting provisions for the rear suspension, air tanks, and exhaust system, with pre‑drilled holes that match the original factory specifications. This ensures that all ancillary components can be installed without modification.
All metal components 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 Assembly remains structurally sound and visually acceptable for many years.
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 crossmembers are 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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