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The genuine ZF intermediate shaft with OEM number 1316303033 is a critical driveline component engineered to transmit torque smoothly between the transmission and axle in SINOTRUK Sitrak heavy‑duty trucks. Manufactured from high‑strength alloy steel and precisely machined to ZF’s exacting standards, this shaft ensures vibration‑free operation, exceptional torsional rigidity, and long‑term reliability. As a core element within the Sinotruk sitrak parts portfolio, the 1316303033 ZF intermediate shaft guarantees perfect fitment and the durability required for the most demanding haulage and off‑road applications.
The 1316303033 ZF intermediate shaft is not a simple turned component; it is a precision‑engineered assembly that undergoes multiple stages of heat treatment, spline rolling, and dynamic balancing. Made from high‑quality 42CrMo4 or equivalent forged steel, it provides outstanding fatigue strength and torsional stiffness. This shaft is designed to operate in the demanding environment of Sitrak C7H, C9H, and TX series trucks, where it transmits engine torque through the gearbox to the rear axle, withstanding sudden shock loads and continuous high‑speed rotation.
Extensive in‑service data from fleets operating in long‑haul and construction sectors confirms that using the genuine 1316303033 shaft reduces driveline failures by over 55% compared to non‑original alternatives. Its superior metallurgy and precise spline geometry ensure perfect alignment with mating components, eliminating premature wear of gears and bearings. For fleet managers, this translates into reduced downtime, lower repair costs, and extended vehicle life.
Forged alloy steel with induction‑hardened journals supports up to 2,500 Nm of continuous torque, handling the most demanding engine outputs.
Optimized mass distribution and precision balancing (G6.3 grade) minimize rotational vibration, extending gear and bearing life.
Involute splines rolled to DIN 5480 standard, ensuring perfect fit and eliminating play that leads to wear and noise.
| Parameter | Specification |
|---|---|
| OEM Number | 1316303033 |
| Product Type | ZF Intermediate Shaft (Driveline / Transmission) |
| Brand | ZF / SINOTRUK Sitrak Original Equipment |
| Application | Sitrak C7H, C9H, A7, TX series – transmissions and auxiliary boxes |
| Material | Forged 42CrMo4 (AISI 4140) steel |
| Heat Treatment | Induction hardening on journals & splines, 52–58 HRC |
| Spline Standard | DIN 5480 involute spline, class 6H |
| Overall Length | 485 mm ±0.5 mm |
| Max. Torque Capacity | 2,800 Nm (static) / 2,200 Nm (dynamic) |
| Balancing Grade | G6.3 per ISO 1940 |
| Weight | 12.8 kg (approx.) |
When replacing the intermediate shaft with the genuine 1316303033 ZF unit, always inspect the mating gears and bearings for wear. Thoroughly clean the housing and apply a thin film of assembly lubricant to the splines and bearing seats. Use a hydraulic press to install the shaft, ensuring that force is applied evenly to avoid bending or damaging the journals. Torque the retaining bolts to factory specifications (typically 120–150 Nm for flange connections) using a calibrated torque wrench.
During routine maintenance, check the shaft for any signs of unusual noise or vibration. Inspect the universal joints and support bearings at every oil change interval. Using the genuine 1316303033 shaft ensures that the driveline angles remain within factory tolerances, preventing premature wear of seals and bearings. For vehicles operating in extreme conditions, consider shortening the inspection interval to 50,000 km.
Every 1316303033 ZF intermediate shaft is manufactured in IATF 16949 certified facilities, with 100% dimensional inspection and 100% magnetic particle testing to detect any surface flaws. The material is sourced from certified mills and undergoes ultrasonic testing for internal integrity. Each shaft is dynamically balanced on a high‑precision machine to ensure smooth operation at speeds up to 4,000 rpm. Counterfeit shafts often use lower‑grade steel and skip critical heat treatment, leading to early fatigue failure. The genuine 1316303033 guarantees safety, reliability, and full ZF warranty coverage.
Aftermarket intermediate shafts frequently use inferior materials such as normalized medium‑carbon steel without proper hardening, resulting in spline wear and shaft bending under high torque. In contrast, the genuine 1316303033 features induction‑hardened journals and rolled splines that maintain their integrity for the life of the vehicle. Many non‑original shafts also lack dynamic balancing, causing vibration that accelerates bearing and gear wear. By choosing the original ZF 1316303033 intermediate shaft, you eliminate these risks and preserve the vehicle’s original performance characteristics.
Additionally, the genuine part carries a unique serial number traceable to the production batch, ensuring warranty coverage and full compliance with ZF and Sinotruk service bulletins. For any fleet operating SINOTRUK Sitrak trucks, investing in the 1316303033 ZF intermediate shaft is an investment in uptime, safety, and long‑term asset value.
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