Good suggestion. A 6.5 HP gas engine torque is approx. 8 ft-lb @ 2500 RPM which should be broadly within the framework of my project.
Check my logic, please
- Thread starter NCMau
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Good suggestion. A 6.5 HP gas engine torque is approx. 8 ft-lb @ 2500 RPM which should be broadly within the framework of my project.
CincyFlyer
Veteran Member
Actually, lower flow (GPM) will give you lower speed, but the torque is a function of pressure.
So what does it mean in my situation, the torque with lower GPM will not change?
Coyote machine
Super Member
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- Tractor
- 22 SANY SY 50U, '10 Kioti DK 40se/hst KL-401 FEL, loaded tires, KB-2485 bhoe, Tuffline TB160 BB, Woods QA forks, MIE Hydraulic bhoe thumb & ripper tooth, Igland 4001 winch, & GR-20 Log Grapple. Woods BBX72" Brush Mower. Diamondplate aluminum canopy
Your tractor is not suited to your desire to run the 21" mower. It doesn't have enough GPM to spare to run your mower blades at adequate RPMs, while allowing for adequate flow and hyd fluid cooling for your tractor You wanting to not spend adequate $ to set it up so it 'might' work adequately, and not to scorch your tractor's hydraulic fluid are incongruent.
IMHO, unless you buy or find parts necessary to guarantee enough flow for both tractor and mower, you should abandon the project.
For what uses exactly do you want to hang a 21" mower on your bucket? There may be other ways to accomplish your task(s).
IMHO, unless you buy or find parts necessary to guarantee enough flow for both tractor and mower, you should abandon the project.
For what uses exactly do you want to hang a 21" mower on your bucket? There may be other ways to accomplish your task(s).
The reason why I don’t want to change my loader PTO pump and tank is because this project is not exactly high priority. If it would work with what I got, fine, otherwise I can skip it. I do have other ways of accomplishing the task, like a modified walk-behind sickle bar mounted on the bucket. This bar, however is not suitable for any growth bigger than 1/2” at best. Also it is a PITA to mount. I was looking for something simpler.
I remember few years back reading one of your posting when you purchase your Samurai, and you were pretty happy with it. It’s amazing that it does a good job running just with 3 GPM (if I remember correctly). Anyway it’s a sweet machine, but man, it’s not cheap.
Another alternative I could have without using hydraulics is to mount the deck with a horizontal electric-start gas engine... possibility.
CincyFlyer
Veteran Member
No. But since horsepower is a function of torque and speed, you'll have less power.
It makes sense. But I will try a quick down'n'dirty prototype just to satisfy myself.
Leejohn
Elite Member
The next best thing would be a 2 cycle lawn mower. There still around, but parts are mostly NLA.
CincyFlyer
Veteran Member
Yeah, I'll sell him my LawnBoy.
LD1
Epic Contributor
Why are you looking at such low speed high gpm motors for?
They make about every possible rpm and flow motor there is.
Your tractor makes 7gpm.....say you want to dedicate 4 gpm to that. And you want 1500rpm....
Just select a pump that will produce 1500rpm at 4 gpm.
No point in buying a slow pump....and slowing it down even more by not delivering the flow.....just to step it back up via a 5:1 pulley. Which by the way....is an EXTREME step to do with a single belt. If your mower pullet is a mere 4" diameter.....that means you need a big honking 20" pulley on the motor.
They make about every possible rpm and flow motor there is.
Your tractor makes 7gpm.....say you want to dedicate 4 gpm to that. And you want 1500rpm....
Just select a pump that will produce 1500rpm at 4 gpm.
No point in buying a slow pump....and slowing it down even more by not delivering the flow.....just to step it back up via a 5:1 pulley. Which by the way....is an EXTREME step to do with a single belt. If your mower pullet is a mere 4" diameter.....that means you need a big honking 20" pulley on the motor.