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The rated operating capacity can often be slightly increased by using an optional factory counterweight package. "For customers at the upper end of the rated operating capacity, one model counterweight can add an additional 150 lbs. of capacity," says Moore, discussing Gehl's skid-steer models. "In addition, it serves as a bumper and hitch. The counterweight on our two larger E Series loaders increases the rated operating capacities by 300 lbs."

Similarly, Bobcat offers factory-approved counterweight packages through its dealers. "Loader owners can add counterweights — available from their dealership — to the machine for an increase in the loader's rated operating capacity," says Fitzgerald. "Even so, the loader owner should still closely follow the manufacturer's recommended limits for specific attachments and carriers."

Attaching weights to the front of the machine can help with the performance of certain attachments. "As long as the counter balance is within the recommended limits of the manufacturer, you can generally put as much weight on the front of the machine as needed because the limiting factors will be the hydraulic system breakout forces and the tipping load of the machine," says Zupancic. "Constant heavier loads will accelerate wear over the life of the machine. For example, constantly lifting 4,000 lbs. versus lifting 100 lbs. will increase wear on the pivot points of the boom linkage over time."

Wheelbase further impacts capacity

The wheelbase also affects the rated operating capacity. "For example, Bobcat has three wheelbase options to choose from," says Fitzgerald. "The small-frame loaders' wheelbase is approximately 36 inches; the medium-frame loaders are 40 inches; while the large-frame loaders are 48 inches. The large-frame skid-steer loaders' wheelbase allows for higher tipping loads and rated operating capacities."

In addition, the extended wheelbases enhance stability. "By extending the wheelbase on New Holland skid steers, we can better distribute the weight over a desired footprint and use the laws of physics to our advantage," says DeHoyos. This allows the skid steers to lift more with less vehicle weight. "The wider wheelbase gives the additional benefit of stability and gives the skid-steer operator more confidence."