Excavator Post Driver Attachments

An excavator post driver mounts to your machine's stick and drives fence posts, T-posts, guard rail, and sign posts without pre-drilling or concrete. The excavator's reach and boom articulation are the advantage here: you can set posts along a ditch bank, on a slope, or over an obstacle that a skid steer could not position against. Sizing starts with your machine's weight class and auxiliary hydraulic flow, since the driver has to match both. Drive style is the second decision, with vibratory units suiting soft to moderate ground and impact units delivering more energy per blow in hard or rocky conditions. Where the ground defeats driving, an excavator auger is the better tool.
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Frequently Asked Questions
Why use a post driver on an excavator instead of a skid steer?

Reach and positioning. An excavator boom articulates, so you can drive posts along a ditch bank, on a slope, across a fence line you cannot drive along, or over an obstacle. A skid steer has to square up to each post directly. For long straight runs on flat ground a skid steer is quicker, but for difficult terrain the excavator wins comfortably.

What size excavator do I need to run a post driver?

Most excavator post drivers are specified by machine weight class, with models sized from compact 1 to 3 ton machines up through larger units. Matching matters in both directions: an undersized machine will be unstable through the drive stroke, and an oversized one can overpower the attachment. Tell us your model and we will match a driver to it.

Does an excavator post driver need auxiliary hydraulics?

Yes. The driver is hydraulically powered, so your excavator needs a working auxiliary circuit with adequate flow and pressure for the specific model. Most compact excavators have one fitted from the factory, but flow rates vary considerably between machines. Check the rated GPM in your operator's manual against the attachment spec before ordering.

Will a post driver work in hard or rocky ground?

Impact-style drivers handle hard, frozen, and rocky conditions better than vibratory units because they deliver more energy per blow. But if you are hitting solid rock or caliche, continued driving will mushroom post tops and stress the attachment. At that point an auger with a rock bit is the right tool. Many contractors keep both and choose by the soil.

How does the driver mount to my excavator?

Post drivers attach to the stick through a pin-on bracket or a quick coupler, depending on the model and your machine. Pin dimensions and spacing vary between manufacturers and weight classes, so this is the detail worth confirming before you order rather than after. Send us your make, model, and coupler type and we will verify the mount.