The role of rated operating capacity

While hydraulic power plays an important role, lifting capacity must also be considered when determining attachment compatibility. "For example, a backhoe attachment can have a considerable amount of weight, but does not require a large amount of hydraulic flow," says Zupancic. "In addition to making sure that the skid steer is compatible with the attachment flow, the customer also needs to be able to safely carry the attachment around the jobsite on all four wheels."

Rated operating capacity plays an even larger role with attachments designed for lifting. "For example, Bobcat manufactures pallet fork attachments for both small-frame and large-frame skid-steer loaders (up to 3,000-lb. rated operating capacity)," says Fitzgerald. "Obviously, the large-frame skid-steer loader with heavy-duty pallet fork can lift more than the small- or medium-frame skid-steer loaders."

But being able to lift the load is not the only consideration. "Rated operating capacity is not only critical for the skid-steer loader to remain safe and stable while lifting and carrying the attachment, but also to provide adequate down pressure on attachments like cold planers, trenchers, tillers, etc.," says Hughes.

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."