Caterpillar offers the 320D L with standard swing radius, the 320 D LRR with reduced swing radius and the 321D LCR with compact radius.
- 148-hp Cat C6.4 engines with ACERT Technology
- Operating weights from 47,554 to 53,307 lbs.
- 28,079-lb. bucket dig force (SAE)
- 20-ft. 11-in. to 21-ft. 9-in. maximum digging depths
- New spacious cab on 320D L and 320D LRR and new cab layout on the 321D LCR
- Standard Power Mode and Automatic Engine Speed Control allow for reduced fuel consumption