PTO multiplier

[Bob Strauss]

Need some help, I have a 1999 L2500 Kubota with 540RPM PTO and an old ford 3pt snowblower (2 stage), it is a standard and in low range it goes to fast in reverse to keep up with minimal snow (6in or more). Is there an after market PTO multiplier out there that will bring me up to 750 or greater to get the RPM's out of the blower to keep up with the speed in reverse?
Thanx
Bob S

 

[bjcsc]

If I understand you correctly, you want to multiply the PTO speed so you can drop the engine speed (and thus ground speed) but still have 540 at the PTO, correct?

 

[Phineas7]

Hydraulic Pump / Motor Adaptors & Spindles

The also show one on the index at the bottom left that is a planitary gear reducer. I would expect that you could planitary gears in the oposite direction as long as they can handle the torque.

PTO Gearbox Fast Find

The PTO generators like Winco have a multiplying gearbox. They have to turn 540 into at least 1800. They might sell them as replacement parts.

I've actually been interested in something like this myself. I'd like to have a PTO generator, but I'd like one that ran with about half the pto speed, so the tractor could just idle along @ 1250 - 1300 rpms.

I've not found anything in the 1:1.5 - 1:2.5 range though.

 

[Dirthog]

The only problem with that is less RPM less engine HP and if you do try and run it at full RPM you will likely destroy the attachment the are not made for that speed

 

[SPYDERLK]

Need some help, I have a 1999 L2500 Kubota with 540RPM PTO and an old ford 3pt snowblower (2 stage), it is a standard and in low range it goes to fast in reverse to keep up with minimal snow (6in or more). Is there an after market PTO multiplier out there that will bring me up to 750 or greater to get the RPM's out of the blower to keep up with the speed in reverse?
Thanx
Bob S

Doesnt the L2500 have granny gears in low range? We had an older one and it did - - as well as 540/1000 PTO. Dont tell me Kubota has chopped valuable features .
larry

 

[Kays Supply]

This is the first time a Grey Market tractor would be better. We have 540,750, 900 and 1100 rpm PTOs.

 

[Bob Strauss]

To all, I do run my L2500 in Low range, and it only has 540 PTO (basic tractor). The old blower only has 3 blades on the fan part of the blower and would probably push more snow if I modified the blades to four instead of three, but a multilpier would let me get the RPMs up to move more snow without the cutting/and welding to go to 4 blades (I'm not sure that it would work anyway). My father-in-law runs his blower at 1000 RPM's and it works great. I don't know if any companies out there make a muliplier or not, but any help in finding one would be appreciated.

 

[RonMar]

To all, I do run my L2500 in Low range, and it only has 540 PTO (basic tractor). The old blower only has 3 blades on the fan part of the blower and would probably push more snow if I modified the blades to four instead of three, but a multilpier would let me get the RPMs up to move more snow without the cutting/and welding to go to 4 blades (I'm not sure that it would work anyway). My father-in-law runs his blower at 1000 RPM's and it works great. I don't know if any companies out there make a muliplier or not, but any help in finding one would be appreciated.

"get the RPMS up"?

IF you are running it at 540 PTO RPM, there is no "get the RPM's up". A blower meant to run at 540, was not meant to run beyond 540 RPM and could dis-assemble itself in a gross fashion if pushed beyond that. I know this dosn't answer your question, but this may be a case of the wrong impliment for your tractor or the wrong tractor for the impliment. It is a simple fact that thinngs ran outside their design parameters don't last, and sometimes kill people...

Good Luck

 

[bjcsc]

Hey Bob, I saw this in the recent Farm Show magazine. Could be worth checking out...

 

[zzvyb6]

I see where John Deere offers a 540E option on their PTO which reduces engine rpm by 1/2 while maintaining 540 rpm shaft output. They claim a 25% fuel savings.

I'm going to try to make a chain drive doubler to run my pto alternator. I found sprockets at TSC of a capacity to take the hp with an overdrive ratio of about 1:2. One sprocket on the alternator input, one on a jackshaft and a 540 pto spline on the end of it.

I bought a frequency and voltage measuring device on eBay that I can plug into one of the 110 outlets to guage the exact tractor rpm that it will take.

 

[bjcsc]

I see where John Deere offers a 540E option on their PTO which reduces engine rpm by 1/2 while maintaining 540 rpm shaft output. They claim a 25% fuel savings.

It's not 1/2, it's 1/4. When I am in 540E, 1700=540, in 540 it's 2400. I suppose it could be different on other models but notice that the engine RPMs are 25% higher in 540 vs. 540E (the math for the fuel savings). It's nice when doing lighter work...

That said, when you're in 540E, the foot and hand throttle (ridiculous terms for a diesel but that's what they call them) are physically limited to 1700RPM. Granted it's adjustable, but it is designed specifically to not be over-revved.

 

[Kays Supply]

My father in law has an old International that had an off set PTO. I made a chain drive offset for him 20 years ago. It is one to one but any gear ratio could be used. I mounted it on the mower. If you have room to do that, it is fairly simple to do. I had to use a bush hog type shaft with a shear pin at off set. I had to put a new chain on it last year. That was the first repair in 20 years.

 

[Brad_Blazer]

For the genset application a phd gearbox is around 3:1 and might work for 1:3. GEARBOX POST HOLE DIGGER - Agri Supply

I second the recommendation against overspeeding any implement.

 

[CamshaftLF]

Bob: I have the sister tractor to yours its a L2350 25hp 21pto I have a ber vac 2 stage blower 63inch and I have never had any problems blowing snow had it where the snow is coming back over the blower and it still keeps on blowing, I also run a 10kw tiger power pto gen with no problem My drive line of my tractor is the same as yours if u put are tractors side by side they look like twins. my low range is very slow. the ber-vac blower is a direct drive no gear boxs at all so the impeller is only turning 540 the blower has 4 paddles maybe thats the difference if yours only has 3 unless bota changed the gear ratio on your model. Like u said your tractor and mine are very basic.

 

[Tom_Veatch]

... I'd like to have a PTO generator, but I'd like one that ran with about half the pto speed, so the tractor could just idle along @ 1250 - 1300 rpms...

Don't forget that if you do this, the tractor develops less power at the lower RPM so the generator size (KVA) you can run will be smaller also. Not a problem if the tractor is large enough and the electrical load is small enough.

 

[hwp]

I had a similar problem when I converted a 3ph tiller to front mount on my F2400. The tiller was designed for a PTO speed of 540 rpm but the low range speed of my pto was 1100 rpm. My local Kubota dealer had a bin of 2:1 gear boxes so I installed one between the tiller and the pto. I used the gear box to reduce rpms but you could run one the other way to increase rpms. However, the gear box I have also reverses shaft direction - a feature I needed but may not suit your needs.

 

[jimmer2880]

This is the first time a Grey Market tractor would be better. We have 540,750, 900 and 1100 rpm PTOs.

Or, in the case of my Yannie, 540, 900 and 1:1