Does a front-end-loader with interchangeable tools qualify as a forklift for training purposes?

No. According to the preamble to the Powered Industrial Truck Operator Training Final Rule, found on page 66255 of December 1, 1998, Federal Register Vol. 63, No. 230, OSHA clearly states that equipment that was designed to move earth but has been modified to accept forks is not covered be the final rule. Therefore, if your vehicle is designed as earth moving equipment, it would not be considered a powered industrial truck within the scope of 1910.178. The design of the vehicle is the determining factor.

As for a skid steer, in a Letter of Interpretation dated March 7, 2000, OSHA said that a skid steer loader designed, manufactured, and used in accordance with Society of Automotive Engineers (SAE) J1057 would be not be considered a powered industrial truck under 1910.178. However, vertical mast skid steer loaders are designed as powered industrial trucks meeting ANSI B56.6 Rough Terrain Forklift Trucks. These skid steers would be considered powered industrial trucks under 1910.178.