I've seen front end loaders for small lawn tractors with linear actuators for sale on the web but not a bh. A 400# actuator uses about 10 amps to move at full load at around 1/4-2/3" per second(sloooow) and have about a 20% duty cycle. Thats 2 minutes of operation and 8 minutes to cool down. Probably be fun to build and operate in a sandbox but not for real work.