Pin-Verified Fitment · 20–22 T CLASS
Attachments for
CAT 320 / 320 GC
Heavy-duty CB-linkage 80 mm pin quarry buckets, standard GP buckets, rippers, plate compactors, and J350 wear parts for Caterpillar 320, 320D, 320E, and Next-Gen 320 GC excavators.
Machine Reference Data
Operating weight20–22 T CLASS
Pin diameter80 MM (CB LINKAGE)
Pin centers / ear width485 MM · EAR WIDTH 311 MM
Auxiliary flow180–220 L/MIN
Coupler interfacePIN-ON / CAT PIN GRABBER
VERIFIED FACTORY REFERENCE SPECS · WE DOUBLE-CHECK AGAINST YOUR SERIAL PLATE BEFORE FABRICATION
8 Compatible Attachments
Fits 320 — No Modification
Quarry
AC-QB-200 · PIN 80 MM ✓
Quarry Bucket
FROM$2,800→
Tilt
AC-TILT-200 · AUX CIRCUIT ✓
Hydraulic Tilt Bucket
FROM$4,150→
Teeth
AC-GET-J200 · J-SERIES ✓
Teeth & Adapters
FROM$38→
Cutting Edges
AC-GET-CE · PIN 80 MM (CB LINKAGE) ✓
Cutting Edges & Cutters
FROM$55→
Plate Compactor
AC-PC-040 · PIN 80 MM ✓
Plate Compactor
FROM$890→
FAQ · CAT 320 / 320 GC Fitment
What are the standard CB linkage pin dimensions on a CAT 320?
Standard Caterpillar CB linkage on 20–22 ton 320-series excavators uses 80 mm main and link pins, 311 mm (or 325 mm with clearance shims) ear width, and 485 mm center-to-center pin spacing.