OEM Part Numbers: The exhaust manifold bolt comes with multiple OEM part numbers, including 8973780610, 8973780620, and 9041308250.
These part numbers ensure compatibility with Hitachi excavator models EX100, EX120, and EX200-5.
Material: These bolts are typically made from high-quality materials to withstand the harsh operating conditions encountered in construction and excavation environments. Common materials include steel, which provides the necessary strength and durability.
Thread Size and Pitch: The specific thread size and pitch of these bolts will depend on the OEM part number. It is crucial to match the bolt's thread specifications precisely to ensure a secure fit and prevent any exhaust leaks.
Length: The length of the exhaust manifold bolt is designed to accommodate the thickness of the manifold and ensure a tight seal. Variations in length may exist among different part numbers, so it is vital to select the appropriate one for your machine.
Head Type: The bolt typically features a hexagonal head or another type of head designed for easy installation and removal using standard tools.
The exhaust manifold plays a critical role in the overall performance of the excavator's engine. It collects exhaust gases from the engine cylinders and directs them into the exhaust system for safe release into the atmosphere. The exhaust manifold bolt is integral to this system for several reasons:
Secure Attachment: The bolt ensures that the exhaust manifold is securely attached to the engine block.
This is essential to prevent exhaust leaks, which can lead to decreased engine performance and emissions issues.
Maintains Sealing Integrity: Proper torque and tension of the exhaust manifold bolt are crucial for maintaining a tight seal between the manifold and the engine. Any leaks in this area can lead to increased noise, reduced engine efficiency, and even safety hazards due to the release of hot gases.
Prevents Vibration-Related Issues: Excavators operate in rugged terrains and perform tasks that generate significant vibrations. The exhaust manifold bolt's role in holding the manifold in place ensures that it remains stable and doesn't loosen due to these vibrations.
Optimizes Engine Performance: A well-sealed exhaust manifold contributes to the efficient flow of exhaust gases, which, in turn, enhances engine performance. Proper combustion and exhaust management are vital for achieving optimal power and fuel efficiency.
Emissions Compliance: In modern construction and excavation equipment, emissions regulations are stringent. A properly functioning exhaust manifold and bolt combination help ensure that the engine complies with these regulations by effectively managing exhaust gases and pollutants.
