Hydraulic Excavators Thumbs

Hydraulic thumbs for excavators come in two basic styles – universal style with its own main pin and a weld-on base plate, or a shared-pin style thumb.

Hydraulic thumbs require a dedicated two-way hydraulic circuit routed up the stick with pressure set approximately 70% of bucket curl pressure so the bucket will be able to overpower the thumb versus the opposite.

The universal style advantage is ease of mounting and a much greatly reduced risk of pin failures.

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