Excavator Plate Compactors: Choosing the Right Size

An excavator plate compactor turns the machine already on your site into a compaction tool. It uses the excavator's hydraulics to compact trench backfill, soil, gravel and base material, without bringing in a separate walk-behind unit or roller. The main thing to get right is matching the compactor to your excavator's weight class.

Excavator-Mounted vs. Walk-Behind

Most people searching "plate compactor" are looking for a walk-behind machine. An excavator-mounted compactor is a different tool. It bolts to your excavator's quick coupler and suits trenching, foundation work and road base, where the excavator is already working in the area. Walk-behind units suit small, open surfaces away from an excavator.

Comparing the Range

Match the Compactor to Your Excavator's Weight

Each model is rated for a specific excavator weight range. Running a compactor on a machine that is too small can overload the hydraulics; one that is too big for the machine won't perform as intended. Check your excavator's operating weight first, then pick the model rated for it.

Check the Coupler and Hydraulics

These compactors use a quick change lugging mount. Before ordering, confirm your coupler suits the mount and that your excavator's hydraulic flow and pressure meet the attachment's requirements. For help with coupler fit, see our guide to choosing the right pin diameter for your excavator quick coupler.

What You Can Compact

• Trench backfill — compact in layers rather than all at once.
• Gravel and road base — a stable, even base before paving or slabs.
• Foundation and landscaping prep — firm, level ground before building or laying.
  
  

Frequently Asked Questions

Can I use an excavator plate compactor instead of a walk-behind? For trenches and areas the excavator is already working in, yes, and it saves bringing in a second machine. Small, open areas away from an excavator may still suit a walk-behind unit better.

What size compactor do I need? Match it to your excavator: 40 kN for 2–4 ton, 50 kN for 4–7 ton, and 100 kN for 10–16 ton machines.

Do I need a special coupler? The compactors use a quick change lugging mount, so check compatibility with your coupler before ordering.

Final Word

Choose by excavator weight first, then confirm coupler and hydraulics. Browse the range in the Plate Compactors collection, or see our broader excavator attachments guide. You can also contact the TMG Industrial Australia team to confirm compatibility.