This plan design was based on a 14-HP white lawn mower tractor. Width of the boom and bucket can be modified depending on the width of your tractor. Bucket width should be at least one inch wider than the front tires. Also, the boom cylinder attachment could be relocated under the frame or at a different location depending on your tractor size.

Specifications
Bucket width 41"
Bucket capacity approximately. 3.45 cubic feet
Lifting capacity 400 lbs at approximately 550 psi
500 LBS at approximately 700 psi