. I have a Case 420 skid steer that the engine blew up. Has any of you replaced the engine in a 420? The engine is not rebuildable and am having trouble locating a used or replacement engine. It is a Shibaura N844LT 4 cyl diesel. New Case engine is $14,000 plus. I found a company in Minnesota that has a Perkins replacement for a lot less but will need extra labor to install.