Komatsu 21K-70-31170 Pin
Warranty: SAME AS OEM WARRANTY
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Product Description
The 21K-70-31170 pin is a high-quality component designed specifically for Komatsu machinery. This pin, also known as 21K7031170, is an essential part that ensures the smooth operation and longevity of your Komatsu equipment.
Crafted with precision and expertise, this pin is built to withstand the demanding conditions of various industries. It is made from durable materials, ensuring reliability and performance even in the most challenging environments.
The 21K-70-31170 pin is compatible with a range of Komatsu models, making it a versatile choice for your equipment needs. Whether you own a construction, mining, or agricultural machine, this pin will fit seamlessly and provide exceptional functionality.
When it comes to maintenance and repairs, using certified premium Komatsu parts is crucial to maximize the performance and efficiency of your machinery. This pin is an authentic Komatsu part, guaranteeing a perfect fit and optimal performance.
Trust in the reliability and durability of the 21K-70-31170 pin to keep your Komatsu equipment running smoothly. Enhance the lifespan of your machinery and minimize downtime by investing in this essential component.
Order the 21K-70-31170 pin today and experience the quality and precision that Komatsu is renowned for. Ensure the optimal functioning of your machinery and enjoy peace of mind knowing that you have chosen a reliable and trusted part.
Komatsu Pin Specifications & Fitment
What it is: Heavy-equipment pin designed for tight-tolerance pivot joints where wear control and alignment matter.
- Part number: See title
- SKU: KM-21K-70-31170
- 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.
WQ Certified™ Komatsu Pivot Standard
Standard: WQ-KOM-PIN-01
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