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Subject: horsepower comparison

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GregW    Posted 02-20-2019 at 21:36:57 [URL] [DELETE]        [Reply] [Email]  
  • horsepower comparison
  • I am looking at a compact tractor to take over some of my 640's duties.
    A front snow blower on the loader arms is needed at my new house.

    I want to get something of similar capability to my 640 so the 640 can be left for play. Are the new diesel compact horsepower ratings the same as the old gas rating for my
    640?
    I know cars changed their measurement method in the 70;s, no sure of tractors have.
    The 640 is 30 HP with 28 drawbar. I want to find a compact that can do the same work but do not know what size to look for.

    JK-NY    Posted 02-24-2019 at 21:26:28 [URL] [DELETE]        [Reply] [No Email]  
  • Re: horsepower comparison
  • Today many compact and subcompact tractors are advertised/ rated by engine horsepower as opposed to your Ford which is rated by pto horsepower. As mentioned a front mounted snow blower would be a better idea than a loader mounted blower. I doubt if a pto driven loader mounted blower is made, so you would be looking at one with a skid steer mount and hydraulic drive (which may require more hydraulic capacity than most small tractors have) or one with its own engine. Of course a rear snow blower is also an option.

    Michford    Posted 02-24-2019 at 11:19:41 [URL] [DELETE]        [Reply] [Email]  
  • Re: horsepower comparison
  • In addition to all the good advice already given, a compact diesel will likely have a hydrostatic transmission which is part of the reason a smaller, lower horsepower tractor can perform like a larger tractor. One thing a smaller compact diesel will not do as well as your 640 is use ground engaging implements like disk or a two bottom plow. Keeping your 640 for those tasks is a good plan. I transitioned from using my 43 horse 860 with a rear snowblower to a 30 horse Kubota with a front snowblower. The Kubota is faster to clear my yard than the 860 was.

    Bruce(OR)    Posted 02-21-2019 at 10:52:00 [URL] [DELETE]        [Reply] [No Email]  
  • Re: horsepower comparison
  • Horse power is great for the 1/4 mile drag and you need more speed.
    Torque is great to get that bucket moving at the bottom end.
    I have only seen a handful of tractors that needed horse power more so that torque

    This ol' boy in the link has a bit of horsepower

    K.LaRue-VA    Posted 02-20-2019 at 23:47:18 [URL] [DELETE]        [Reply] [No Email]  
  • Re: horsepower comparison
  • Diesel engines have more torque at lower RPM than gas engines so it's a lot harder to lug them down to stall with a load. Using just my butt dyno a 30HP diesel seems to have a lot more power than a 30HP gas engine. Horsepower is horsepower so they should be equal, but the diesel will do more work and burn less fuel doing it. Another maybe more important variable for comparison is physical size and weight. If the compact diesel tractor is much smaller and lighter than the 640 you are used to, it probably will not seem to put the power to work as well. Smaller tires and less weight may not let you use the power effectively. If you can find something approximately the same size and weight, a 20HP diesel may be about equal to a 30HP gas tractor. Again, that is just based on how the tractors feel to me with no scientific calculations.

    Sidebar discussion should be tires. Many modern compact tractors are being sold with type R4 tires. These appear to be a compromise between AG tread and Turf Saver. They may appear to be a good compromise but they actually have far less grip than regular AG tread tires. This will greatly affect how much power can be put to the ground with implements. The R4 is harder, wider, rolls smoother, and will last longer than AG tread if you operate mostly on hard pan and pavement.

    Dean    Posted 02-21-2019 at 08:28:29 [URL] [DELETE]        [Reply] [No Email]  
  • Re: horsepower comparison
  • R14T tires are just hitting the market. These tires are a bit of a compromise between R1 and R-4 tires with some aspects of R-3 tires included.

    I saw them at the Louisville show last week and predict that they will be VERY popular with CUT and SCUT buyers.

    Good Year/Titan had independent displays and Kubota had 2 or 3 tractors with R14Ts mounted.

    Dean

    Dean    Posted 02-20-2019 at 23:14:04 [URL] [DELETE]        [Reply] [No Email]  
  • Re: horsepower comparison
  • HP is HP but you must compare apples to apples, i.e., PTO HP to PTO HP.

    Be advised that snow blowers are heavy. Mounting one on a FEL is not a good idea as you will need significant counterweight.

    That said, front mounted snow blowers for compact tractors (not FEL mounted) are readily available. Such snow blowers mount to sub frames mounted beneath the tractor. As a result the snow blower is much closer to the tractor than would be a FEL mounted unit be.

    Your 640 is closer to 32 PTO HP than 30. A 32 PTO HP compact tractor will do as much work on the PTO as will your 640 but it will be considerably lighter. As a result it will produce less drawbar HP even with FWA.

    Dean

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