Caterpillar 311D 312D 314D Hydraulic Excavators Global Service Learning Manual – PDF DOWNLOAD

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SERV1851 02/08

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Text Reference Boom, Stick, and Bucket Circuits

Boom Cylinder

Snubber

Snubber

Stick Cylinder

Bucket Cylinder

139

Cylinders The boom, stick, and bucket use dual acting cylinders. The boom has a snubber for the rod end, while the stick uses snubbers on the rod and head end. Snubbers slow the speed of the cylinder as the cylinder reaches the end of the cylinder stroke.


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