321F Compact Wheel Loader. The largest in our lineup of Tier 4 Final F Series Compact Wheel Loaders is the stout 321F with Z-Bar linkage. The 321F delivers a full-height lifting capacity of more than 8,000 lbs. (3,640 kg) and bucket breakout force of up to 11,000 lbs while still maintaining a low overall height of only 8 ft. 10 in. (2,681 mm).