(800) 853-2651
SHOP NOW

Help me understand PTO speeds

B

bobinIL

Member
I apologize if this has been beat to death on here but I want to understand how the 1000 rpm PTO works vs the 540 rpm PTO. The way I understand it is, On the Tach of the tractor there is a line that says
(PTO) it is usually around 1400-1800 rpm engine speed depending on the brand of tractor. so if I run my tractor up to this mark lets say 1800 rpm engine speed my PTO shaft will be turning either 540rpm or
1000rpm depending on which shaft I have. So if I have a mower set up to spin the blades at 500rpm for optimal performance the mower gear box would be almost a 1 to 1 gearing for a 540 PTO. But if I put an
adapter on to hook it up to a tractor with a 1000 PTO at the designated 1800 rpm engine speed I will be turning the mower blades twice the RPM recommended causing possible mayhem. Therefore I would have to
reduce the engine speed to about 900rpm to make the mower blades turn at the correct speed.
 
Yep,you got it. to run a 540 rpm implement on a 1000 rpm tractor,you will need to cut the tractor rpm in half. Run it at half throttle.
 
Depends on the tractor and which shaft you have in it. My 2-135 White runs the 1000 shaft at 2200 engine rpms,and the 540 shaft at 1700 engine rpms.
 
Well, yes, but generally 540 pto is for smaller stuff under 75hp, and 1000pto is for bigger tractors and implements over 75hp.

So, it's not real common to be doing it the way you say. Sometimes we run a 540 implement with a bigger tractor with an adaptor from 1000, and then as you say you need to ripen the throttle about 1/2 speed or bad things can happen.

If you have a tractor near that 75hp size and it came with interchangeable output shafts, they are geared differently and will spin the correct speed at pto settings.

Paul
 
I had an IH 826 for awhile that I did just that. made up a shaft to run the haybine and baler off the 1000 pto No one run it but me. I wouldn't want to put anyone else on it unless I was sure they knew what they were doing.
 
I had a JD 4010, about 70 hp and a 4020, about 100 hp. One of them, maybe both, but at least one had a spare PTO shaft that you could easily exchange if running a 1000 implement.

Only 1000 rpm implement I recall, many many years ago was a neighbor's belt driven hammer mill, which as I recall was driven by his JD B off the right side of the tractor using about a 20' 6(ish)" wide belt.
 
I had an 8' twin blade mower that I ran behind my tractor with the 1000 PTO shaft adapter....now that I recall the instance, it was on the 4020. I did as you said, cut the rpms down to half normal PTO speed and away I went. Just happened to be this mower and this tractor whereby I got high centered on a terrace and before I could realize what was happening, I took out the center gear box. Finding a replacement at a reasonable price was impossible. No I don't remember why my protective device failed, nor which kind it was, slip clutch or shear bolt.

After that occurrence, I paid more attention to gearbox rating vs driving tractor hp and ensuring that the protective device was functioning properly.
 
You must log in or register to reply here.

Similar threads

super99
1655 Dual Speed PTO
Replies
2
Views
248
NEWIoliver
N
C
John Deere 4640 and 540 pto ?
Replies
8
Views
407
NY 986
N
B
1486 digital dash
Replies
1
Views
182
Wisconsin Ron
W
T
SOS Tranny...No Movement
Replies
6
Views
381
KCTractors
K
T
4000su SOS
Replies
12
Views
452
Bern
B
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