Hitachi 4381855 Bushing | Hitachi Excavator Parts

The 4381855 bushing is a high-quality replacement part for Hitachi machinery. Designed to fit seamlessly into your equipment, this bushing ensures smooth and efficient operation. Crafted with precision and durability in mind, it is built to withstand demanding conditions and provide long-lasting performance. This bushing is meticulously engineered to deliver optimal functionality without compromising on quality. It is compatible with various Hitachi models, making it a versatile choice for your machinery needs. Whether you're working in construction, mining, or any other industry that relies on Hitachi equipment, this bushing is an essential component to keep your machines running smoothly. With its reliable construction, this bushing offers excellent resistance to wear and tear, reducing the need for frequent replacements. It effectively minimizes friction, enabling your equipment to operate efficiently and extend its lifespan. This not only saves you time and effort but also helps to maximize productivity and minimize downtime. Installation is hassle-free, thanks to the precise design of this bushing. It fits securely in place, ensuring a snug and reliable fit. This eliminates any potential issues that may arise from loose or ill-fitting parts, giving you peace of mind during operation. Investing in the 4381855 bushing means investing in the performance and longevity of your Hitachi machinery. With its exceptional durability and compatibility, it is an indispensable component for maintaining the efficiency and reliability of your equipment. Upgrade your machinery today with this high-quality bushing and experience enhanced productivity and reduced maintenance costs.

Hitachi 4381855 Bushing Specifications & Fitment

What it is: Heavy-equipment bushing designed for tight-tolerance pivot joints where wear control and alignment matter.

• Part number: 4381855
• SKU: HIT-4381855
• Typical use: Boom/arm/bucket linkages, work equipment pivots, and high-wear joints.

Key measurements to confirm

To ensure correct fit, match the following measurements to your machine’s worn component or OEM spec:

• Inside Diameter (ID): ___
• Outside Diameter (OD): ___
• Overall Length: ___

Quality notes

• Designed for consistent clearance and long service life when installed with proper lubrication.
• Replace pins and bushings as a set when wear is uneven to prevent premature failure.

Installation tip

Measure the bore, pin, and bushing after press-fit. Use proper tooling and lubrication, and re-check end-play after assembly.

Need help confirming dimensions? Send your machine model and the measurements above and we’ll verify fitment.

Komatsu maintenance notes (quick guide)

• Early-life greasing: For excavators, Komatsu guidance calls for greasing work equipment pins every 10 hours for the first 50 hours, and greasing again after water work.
• Clearance control: Komatsu linkage manuals commonly specify pin–bushing clearance targets and a typical service limit around 1.0 mm for many joints, often managed with shims.
• Tracked machines: For undercarriage track joints, pin/bushing turning is condition- and wear-window dependent; abrasive sites can accelerate wear substantially.