(800) 853-2651
SHOP NOW

Increasing PTO Speed

A

Anonymous-0

Well-known Member
I'm looking to increase the PTO speed from 540 to about 3600 to power a lawn vac that was powered by a gas engine.

I was thinking of using some cast iron pullies and noticed the one I was looking at said it was a fractional HP pulley and another said light duty.

Allways thought the cast iron pullys could handle more than fractional hp - that it was the belt and angles-distance-ampount of belt incontact with the pulley that would be the limiting factor.

Will the pulley shatter or some other bad thing under say 8HP.

I'll be using a belt capable of the HP

Thoughts? 18" pulleys are expensive to try out
 
When I need a big pullet I buy the pulley blank and a hub and weld them as needed and the cost is not all that bad. Most farm and home places sell blank pulleys and hubs
 
Your 18" pulley will only be turning at 540 the out rin will have greater speed you might want to check that out. The smaller puller on the power vac will be screaming at 3600 make its a steel pulley.

Walt
 
Your overdrive ratio is 6.666 to one. To carry 8 hp, the driven pulley must be about 6 inches in dia. The drive pulley would be radical in size. If you used a double belt system with a jackshaft, and a output shaft, you would be able to use two 20 inch drive and two 6" driven pulleys (approximate sizes) to get close. Pretty pricy and pretty much more than a replacement engine. And then the driveshaft. Jim
 
I had a pto driven years ago and it was a pain in the a$$.Why not buy a right angel gear box and be done with it?Click the link.

http://www.trac-vac.com/index_files/Model858.htm
 
Also depending on the tractor pto clutch most ptos are instant off. With that many rmps on the implement it would be wise to have an overdrive on the pto shaft.
 
I did basically the same thing a coupla years ago to run a hydraulic pump on a log splitter off of a 540 PTO via a stub PTO shaft. My goal was to run the pump at 2000 rpm with the tractor at a fast idle.

Ya gotta remember the tractor engine has to be running at full governed throttle to get 540 rpm at the PTO. I wound up with a 15" drive pulley and a 3 1/2" driven pulley, and then had to double belt to prevent slppage.

It works, but would I do it again? No. I'd put a separate engine on the splitter. The photo was taken before I increased the size of the drive pulley and double belted it by welding another pulley on the side of the first ones.

And, yes, I did use an ammo can for a hydraulic reservoir. Works great.
a81794.jpg
 
Thanks for the advice.

The reason for switching is noise and having to take care of yet another engine.

The unit will go behind a Kubota BX2200 which can runs both the mower deck and rear PTO at the same time.

I went with a 18.75 pulley on the PTO side to a 2.5 pulled that powers the blower using 2 BX belts.

Your correct even with all the old steel and parts I had laying around the extra parts cost the same as a new engine.

But this one will last forever
 
You must log in or register to reply here.

Similar threads

P
HP vs PTO implements
Replies
15
Views
2K
504
5
stevieb49829
Re:Massey Harris 101 Jr PTO belt pulley?
Replies
4
Views
373
Janicholson
Janicholson
M
Oliver Super 55 Diesel Cracked Head and PTO Clutch
Replies
17
Views
1K
magnumpowers
M
S
5000 PTO education
Replies
9
Views
963
Fred Werring
F
G
Ford 2000 3 cylinder gas 4 speed PTO shaft
Replies
8
Views
1K
Grtaylor
G
Tractor Parts Tractor Manuals

We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today.

Copyright © 1997-2024 Yesterday's Tractor Co.

All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.

Yesterday's Tractors - Antique Tractor Headquarters
Website Accessibility Policy

Back
Top