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Cat 303.5/304 Mini Excavator Bucket Ears & Pins

$147.77 on Amazon.com (as of October 17, 2026, 9:39 AM EST) View details ↗

Upgrade your Cat 303.5 or 304 mini excavator with these heavy-duty weld-on bucket ears and matching 40mm pins. Designed to replace worn, elongated, or damaged bucket ears, these high-quality steel attachments restore a tight pin fit, reducing excessive play between the bucket and stick for improved performance and longevity.

The package includes one pair of bucket ears and two 40mm pins with retaining hardware, ensuring a secure connection for custom buckets, repairs, or attachment conversions. The ears feature heat-treated surfaces for enhanced wear resistance at the pin contact points, making them ideal for demanding applications like grapples, rippers, or thumbs. Perfect for fabricating custom excavator attachments or restoring damaged components to factory specifications.

Before purchasing, verify your existing bucket ears and pin size (40mm diameter) and center-to-center distance (7-13/16″ or 200mm) to guarantee a perfect fit. These durable steel parts are built to withstand heavy-duty use, ensuring reliable performance on your mini excavator.

Pin Diameter40mm (1.57″)
Pin Center-to-Center Distance7-13/16″
MaterialHeavy-Duty Steel
Heat TreatmentWear-Resistant Contact Surfaces
Included Components1 Pair Bucket Ears + 2 Pins + Retaining Hardware
Fit ForCat 303.5 & 304 Mini Excavators
Are these bucket ears compatible with other excavator models beyond the Cat 303.5/304?
These are specifically designed for the Cat 303.5 and 304 models, but you may verify compatibility with other mini excavators by measuring the pin size (40mm) and center-to-center distance (7-13/16″).
Do the included pins require any special tools to install?
The pins are designed to fit securely with the provided retaining hardware, but a basic impact wrench or socket set may help with installation if welding is not being used.
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