I have a 75hp tractor that I would like to put a hyd. snow blower on the front loader , tractor only has 12.5 gpm hyd flow , so Im just thinking about the power pacs that are driven off the pto , My question is they need to be run at 540 rpm which is wide open thottle could I put a 1000 rpm shaft in the tractor and be able to lower the engine rpm to still run the pump at 540 rpm ?
- Thread starter grizz02
- Start date
I used to have a large tractor and small 3 pt rotary mower. I did what you are suggesting all the time. Only problem would be if you had a heavy load and only running half throttle you may be below the peak of the torque curve meaning when you loaded the engine it would tank, rather than increase torque and pull against the new load.....but a snow blower I doubt it would be considered a heavy load...a plow yes.
A snow blower in deep snow is in fact a heavy load. I used to own a IH 186 hydro (105 pto hp) and a 8 foot BER Vac snow blower and sometimes just creeping along was enough to pull it down.
Now before some of you claim that 186 must of been a dog it was stronger on the pto than any of the 3 JD 4020's that I have owned.
Now before some of you claim that 186 must of been a dog it was stronger on the pto than any of the 3 JD 4020's that I have owned.
Tx Jim
Well-known Member
- Location
- Coyote Flats, Texas
What model & yr tractor are you referring to?
Blackhole49
Well-known Member
- Location
- White Lake MI
Not apples to apples, but kind of is. I can run this front pto at 1100 rpm or 2500 rpm. The tractor is only 20hp but will run a 60 mower all day in heavy grass in the 2500 rpm. If put the blower in 2500 rpm, it will throw 3 inches of power to the next county as long as I creep along. Move any faster, and it dies. I can blow 12 inches of snow until the cows come home in 1100 pto. No matter what you do, in my experience, running the tractor at less than full throttle under a load just doesn't work. Snow blowers are a load.
BarnyardEngineering
Well-known Member
- Location
- Rochester, NY
You can but you'll find out pretty quickly that you won't have enough power to run the blower in very much snow.
Your 75HP tractor does not produce 75HP from idle all the way to full throttle. HP increases as engine RPM increases. It produces that 75HP at full throttle, and you'll need every bit of that power to run much of a snowblower in any amount of snow, ESPECIALLY with the power loss from the hydraulic drive.
Your 75HP tractor does not produce 75HP from idle all the way to full throttle. HP increases as engine RPM increases. It produces that 75HP at full throttle, and you'll need every bit of that power to run much of a snowblower in any amount of snow, ESPECIALLY with the power loss from the hydraulic drive.
Bob Bancroft
Well-known Member
- Location
- Aurora NY
I have only seen that work once- when a neighbor with a 125 HP tractor and a small snow blower needed a slower reverse. He used the 1000 RPM shaft adapted down to 540, ran the engine at the reduced speed, to get the slower reverse. It worked for him as he would take a small bite- whatever was necessary to keep going.
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