Big enough for what use? What do you plan on using it for? There may be a function that you have in mind where not covering the track with the blade would still work for you, but as already stated above a 5’ won’t cover the rear track when angled-though as I said-based in what you want to use it for that may not be a problem for you. Does it offset at all, that may make a difference as well?title say s it all, new 2038 and need a rear blade. I know a 6 ft would be perfect but found a 5ft with hyd angle cheap o na dealer lot and wondering if it big enough
I have a 7 footer for my 2032R. Wouldn’t go any smaller.
I have tried various sizes on my 790. I can run a 7' on dirt/gravel ok but deep snow or snow/ice combo can make it turn the tractor around or crab at a serious angle. It's really helpful to offset the blade to counteract this. If the blade is angled with the right forward and the left back it would normally turn the tractor to the left in deep snow. So I offset the blade slightly to the right and it mostly goes straight. (Left and right as viewed from the back.)
I really like the ability to offset the blade not only for snow but also because I can keep the tractor in the traveled portion of a road and still scrape the sides of the road and pull back gravel, cut out ruts etc. The offset is almost a must for cleaning a ditch out as well.
For ordinary situations, you want to be able to cover the wheel tracks with the blade angled. You also want to be able to spin the blade backwards without hitting the tires or doing odd gymnastics. As a practical matter, that limits the width of the blade to some extent although wider blades usually also have a deeper reach from the 3PH which helps some.
If you use a blade for dirt/gravel then weight is your friend. There's no down pressure on the 3ph so it's the weight of the blade and the curve of the moldboard/cutting edge to keep it from chattering and leaving a rough surface. You can do a rough comparison by looking at the weight of the blade and divide by the width so you get pounds/foot of blade. Normally, a wider blade also has more pounds/foot because the extra stress requires more steel not only on the blade but also the rest of the assembly. Too much weight in snow isn't good as you can tear up asphalt or concrete, cut through snow and into gravel etc. unless you are really careful or use a soft cutting edge. There's a whole discussion on here somewhere about rubber edges vs. cutting PVC pipes for use in snow so I won't repeat all that.
My back blade prefers garlic,,,:dunno:I would think as long as you had enough front ballast, an 8 footer would be fine on a 4 series.
The 7 footer I have is a beast and the 2032R stays the course. “Light” grading? No problem, in my onion.