Tier 4-Interim upgrade delivers higher horsepower to the DL300 and DL350 wheel loaders than their predecessors, Doosan says. DL300 is now a 271-horsepower unit, up from 217, and the DL350 jumps to 271 from 232 horsepower. The DL300 has a 4.2-cubic-foot bucket, breakout force of 37,993 pounds, and full-turn tipping capacity of 28,572 pounds. Model DL350 has a 4.8-foot bucket, breakout force of 37,768 pounds, and tipping capacity of 31,118 pounds. Diesels use SCR with urea diesel exhaust fluid.