I put a hydro unit on my 147 and It's not a mere bolt on. The driveshaft needs to be shortened and another pulley needs to be added to the rear of the engine because the one that's on the 14 horse does'nt stick out far enough to get a belt on. The hydro unit needs to be moved back to line up to the new pulley and the frame needs to be drilled for the support bracket. Moving the hydro unit back also causes some clearance problems with the rockshaft. When it's in full up position the rockshaft will hit the back of the slot on the tractor body causing the cylinder shaft to bend. I did'nt want to cut the body out so, I had to modify the rockshaft. It works great but, if you don't have a welder, a way to cut steel, and patience, forget it.
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