I don't think I'd call them particularly powerfull either. The main features of the 520A were it's fuel efficiency and low end torque. It did have good torque but it quickly ran out of steam at the top end. I always found it to be a very unsteady engine when it was pulling as well... but I will give it credit... it was easy on fuel. For the lighter work we often used it for it would run for days on a tank. The downside... it had no electrical system to speak of. It leaked oil from every orifice in it's entirty, it had a very poor steering system with an even worse turning radius and it had no brakes to speak of. That's before you get into the eccentricities of it's hydraulic system and the lack of draft control... or the poor PTO setup... or the extensive number of external linkages and levers that are required to keep everythign working. They're just a primitive beast that was poorly built at that. Poor casting quality, poor steel quality and poor design.
Yes, a person can get by with them and make them work but by the time you fix all of the things that need fixing on them and still have to deal with a red pig... you could just as well take your money and buy a decent Ford, Deere, IH, MF or just about anything else of that vintage and have a better tractor.
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Today's Featured Article - Two-Brush Generators - by Chris Pratt. Whether for product liability or because the aftermarket parts and labor business is lucrative, this concept is disturbingly prevalent. Fortunately when you step into your shop and make that jump 50 years back in time to work with your old tractor, this concept goes out the window. Even so, when it comes to the charging system, people quickly revert to this idea and start replacing the major components one at a time until it works. The reason you don't find any decals in your replacement set wit
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