<font color="blue">The 4500 4wd is a little underpowered in my opinon for teh weight. </font>
Your statement about the 4500 being "underpowered for the weight" is something I'll have to disagree with.
Weight is a GOOD thing when it comes to tractors. Everybody wants more weight on their tractor, not less. People load tires, add aftermarket weights, or even make their own (see another thread here on TBN). All that HP does you no good if your spinning your wheels, and if you are "light," that's exactly what will happen. Weight makes your translation of HP into work much more efficient because it increases traction/reduces slippage. Never ever heard a tractor owner complain his tractor was too heavy and he was therefore getting too much traction. I'm sure there is someone out there like this, but they must have some other considerations in mind (e.g. "ruts", etc.)
Am I saying the 5500 is overpowered? Certainly not. HP is good thing too - just like weight. For pulling a given implement, a 5500's engine will be less "loaded" than a lower HP engine. But this is not because of the 5500's weight (and similar traction as a 4500 - i.e. similar contact pads on the wheels) - it is because the 5500's engine is designed to produce more HP, hence it would be operating at a lower percentage of it's total potential HP.
Weight has nothing to do with the ability of the engine to move the tractor, (all tractors are "overpowered" in this respect considering their gearing) but it has everything to do with traction. When it comes down to it, weight is a lot like 4wd. Both help get more HP to the ground so you can work and don't just "spin out." Weight? Give it to me, I’ll take it!
Your statement about the 4500 being "underpowered for the weight" is something I'll have to disagree with.
Weight is a GOOD thing when it comes to tractors. Everybody wants more weight on their tractor, not less. People load tires, add aftermarket weights, or even make their own (see another thread here on TBN). All that HP does you no good if your spinning your wheels, and if you are "light," that's exactly what will happen. Weight makes your translation of HP into work much more efficient because it increases traction/reduces slippage. Never ever heard a tractor owner complain his tractor was too heavy and he was therefore getting too much traction. I'm sure there is someone out there like this, but they must have some other considerations in mind (e.g. "ruts", etc.)
Am I saying the 5500 is overpowered? Certainly not. HP is good thing too - just like weight. For pulling a given implement, a 5500's engine will be less "loaded" than a lower HP engine. But this is not because of the 5500's weight (and similar traction as a 4500 - i.e. similar contact pads on the wheels) - it is because the 5500's engine is designed to produce more HP, hence it would be operating at a lower percentage of it's total potential HP.
Weight has nothing to do with the ability of the engine to move the tractor, (all tractors are "overpowered" in this respect considering their gearing) but it has everything to do with traction. When it comes down to it, weight is a lot like 4wd. Both help get more HP to the ground so you can work and don't just "spin out." Weight? Give it to me, I’ll take it!