The 080V04200-6030 rocker arm unit assembly is a fundamental component of the engine’s valvetrain, responsible for translating the rotational motion of the camshaft into the linear motion required to open and close the intake and exhaust valves. Its primary functions include transmitting the camshaft lobe profile to the valve stem, maintaining precise valve timing and lift, and absorbing the high dynamic loads generated during the combustion cycle. In heavy‑duty diesel engines, the valvetrain is subjected to extreme forces, high temperatures, and continuous operation. A worn or damaged rocker arm assembly can lead to incorrect valve timing, loss of power, increased fuel consumption, excessive noise, and even catastrophic engine failure. By installing the genuine 080V04200-6030 rocker arm unit assembly, you restore factory‑specified valve actuation, ensuring optimal engine performance, fuel efficiency, and extended service life.
Precision Valve Actuation
Precision‑machined rocker arm geometry ensures accurate valve lift and timing for optimal engine breathing and combustion efficiency.
High‑Strength Material
Manufactured from high‑grade alloy steel with hardened wear pads and roller bearings for exceptional durability and reduced friction.
Integrated Roller Bearing Design
Roller bearings on the rocker arm pivot reduce friction and wear, extending the life of both the rocker arm and the camshaft.
OEM‑Exact Fit
Manufactured to Sinotruk’s original specifications – direct replacement with no modifications.
| Parameter | Specification |
|---|---|
| OEM Number | 080V04200-6030 |
| Product Name | Rocker Arm Unit Assembly |
| Brand | HOWO / Sinotruk |
| Material | High‑grade alloy steel (42CrMo4 equivalent), hardened and ground |
| Operating Temperature | -40°C to +150°C |
| Valve Lift | ~ 12 mm (nominal, varies by engine cam profile) |
| Weight (per unit) | ~ 1.2 kg |
| Quality Standard | Original Sinotruk / HOWO OEM specification |
| Warranty | 12 Months |
The 080V04200-6030 rocker arm unit assembly is a direct replacement for the original component used in a wide range of HOWO and Sitrak heavy‑duty diesel engines. It is a critical part of the valvetrain assembly and is commonly specified for:
The 080V04200-6030 rocker arm unit assembly is manufactured to the highest quality standards, ensuring it outperforms generic aftermarket alternatives. Forged from premium alloy steel and precision‑heat‑treated to achieve optimal hardness and toughness, this rocker arm offers exceptional resistance to wear, fatigue, and deformation under high‑load conditions. The contact surfaces are ground to a mirror finish, reducing friction and ensuring smooth, consistent valve actuation. The integrated roller bearing at the pivot point minimises friction and wear, reducing parasitic losses and extending the life of both the rocker arm and the camshaft. Each assembly is inspected for dimensional accuracy, hardness, and surface finish to guarantee compliance with OEM specifications. This commitment to quality translates into reliable valve operation, improved fuel efficiency, and extended engine service life.
Precision Forging & Grinding
Rocker arm geometry and contact surfaces are ground to sub‑micron accuracy for consistent valve lift and timing.
Advanced Heat Treatment
Optimised hardening process ensures high core toughness and surface hardness for maximum wear resistance.
100% Dimensional Inspection
Every assembly is verified against OEM drawings to guarantee perfect fit and function.
Genuine OEM Quality
Built to Sinotruk’s original specifications – guaranteed performance and reliability.
Installing the 080V04200-6030 rocker arm unit assembly requires careful attention to cleanliness, torque specifications, and valve lash adjustment. Always refer to the appropriate workshop manual for your HOWO or Sitrak model. Before installation, thoroughly clean the cylinder head and the rocker arm shaft, removing any debris, old sealant, or oil residues. Inspect the rocker arm shaft for wear or scoring – replace if necessary. Install the rocker arm assembly onto the shaft, ensuring correct orientation and alignment with the pushrods and valve stems. Tighten the rocker arm shaft retaining bolts to the specified torque (typically 80‑100 Nm, depending on engine variant). Adjust the valve lash (clearance) to the factory‑specified values using a feeler gauge, following the correct firing order and adjustment sequence. After installation, run the engine and listen for unusual noise, then re‑check valve lash after the first warm‑up cycle. During routine maintenance, inspect the rocker arm assembly for signs of wear, pitting, or roller bearing damage, and replace if necessary.
Choosing the 080V04200-6030 genuine rocker arm unit assembly is an investment in the long‑term reliability and performance of your HOWO or Sitrak engine. Inferior aftermarket rocker arms often use lower‑grade materials, imprecise machining, and inadequate heat treatment – leading to premature wear, noise, and loss of valve control. By using a genuine OEM component that adheres to Sinotruk’s exacting standards, you guarantee perfect fitment, consistent valve actuation, and maximum durability. Fleet operators and workshop professionals worldwide trust this rocker arm assembly to maintain the integrity of their engines, reduce unplanned downtime, and lower overall maintenance costs. With its proven quality and reliability, it is the definitive choice for those who demand excellence.
“We have standardised on the 080V04200-6030 rocker arm assemblies for all our engine overhauls. The fit is perfect, the valve actuation is precise, and we have seen a significant reduction in valvetrain noise and wear. This is the only rocker arm we trust for our fleet.”
The 080V04200-6030 rocker arm unit assembly is designed to fit a comprehensive range of HOWO and Sitrak heavy‑duty trucks, including the most popular models. It is a direct replacement for the original rocker arm fitted at the factory, ensuring a seamless swap without any modifications. Always confirm the OEM number 080V04200-6030 on your original assembly or by cross‑referencing your vehicle’s VIN with the Sinotruk parts catalogue. For any uncertainty, consult your local HOWO or Sitrak dealer with your chassis number.
HOWO and Sitrak engines are subjected to the most punishing conditions – from freezing cold starts to scorching desert heat, from constant high‑load operation to the corrosive effects of moisture and road salts. The 080V04200-6030 rocker arm unit assembly is engineered to withstand these extremes. Its high‑strength alloy steel construction and precision heat treatment ensure resistance to wear, fatigue, and deformation under heavy loads and thermal cycling. The roller bearing design minimises friction and wear, maintaining consistent valve actuation even under sustained high‑speed operation. This rocker arm assembly is built to deliver reliable, maintenance‑free performance for the entire service life of your engine, reducing unplanned downtime and repair costs.
Extreme Temperature Tolerance
Reliable from -40°C to +150°C – maintains dimensional stability and mechanical properties.
Vibration & Impact Resistant
Robust construction withstands constant engine vibration and shock loads without failure.
Corrosion Protection
Advanced surface treatment provides long‑term resistance to moisture and oil degradation.
High Fatigue Life
Designed for millions of cycles under rated load, meeting or exceeding OEM durability requirements.
The 080V04200-6030 rocker arm unit assembly is supplied in protective packaging to ensure safe delivery and convenient storage. Each assembly is individually wrapped in anti‑corrosion material and sealed in a plastic bag to prevent contamination. Bulk packaging options are available for workshops, fleet depots, and OEM service centres, offering cost savings and streamlined inventory. Every pack is clearly labelled with the OEM number, product name, and key specifications for easy identification. Always verify the OEM number 080V04200-6030 on the label before installation to ensure you are using the correct genuine component.
OEM: 080V04200-6030 | Genuine HOWO / Sitrak Rocker Arm Unit Assembly
Choose 080V04200-6030 rocker arm unit assembly – the professional‑grade valvetrain component that delivers precise valve actuation, exceptional durability, and reliable performance for your HOWO or Sitrak truck.
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