Case Construction Equipment updated its 621F and 721F wheel loaders to meet Tier 4 Final emissions standards. Each model comes with selective catalytic reduction solutions to treat emissions separately with diesel exhaust fluid, which improves fuel efficiency and lower exhaust temperatures. The 621F and 721F wheel loaders produce 162 and 179 horsepower, respectively. Both machines are also available with a tool carrier or extended reach linkage options, the company says. The loaders include heavy-duty axles with auto-locking front and rear differentials for optimal traction in any condition, which also helps reduce tire wear. Additionally, both loaders have ground-level service points and eye-level fluid gauges to make maintenance easier.