They all needed a stack of what a friend of mine calls mafia blocks on the back of them. His large forklift is capable of lifting its 30,000 lb rating but anything over 20,000 K he stacks a 10,000 lb block on the back. He says it is there for the just incase. When I had my 25,000 Taylor we welded a 6in. thick steel plate the same size as the counter weight on the back so that the forklift would always run out of lift power before the back got light. We sold it to a guy who welded another 10 inch thick plate added 10,000 lbs to the fenders turned the hydraulic pressure up to 3000PSI from the 2000 PSI setting added 2 more hoist chains foam filled the tires then had it certified as a 50K forklift He said those old Taylors the size of that one because of its shared components and frame of much large cap. forklifts, could actually lift 80K before the mast and carriage reached their safe limits. I don't know I was happy with being able to lift 25K and still be able to drive over rough terrain