Posted by Janicholson on January 13, 2018 at 09:05:55 from (63.152.209.198):
In Reply to: JD 520 PTO problems posted by Hal Roberts on January 13, 2018 at 08:29:05:
The hammering when turning may have been directly attributed to the geometry of the front universal joint's relationship to the hitch pin location, the phase relationship of the yolks in the PTO shaft, and angle of the turn. 1]If the Ujoint location (front to back) is at or close to the hitch pin, the front joint is angled much more, or has all the angle compared to the rear joint in that shaft. This causes rotational accelerations and decelerations in the the shaft that are not cancelled by the rear joint. If not canceled, the change in RPM 4 times per rotation (faster slower faster slower) is trying to change the speed of the driven attachment, be it a mower, or baler. The inertia of the implement causes this to be a radical vibration. The hitch point pivot needs to be rearward of the front joint So that the angle in a turn is far more equal between the two joints. 2} If the two Ujoints are not in phase (on a piece of paper draw a backward capital C draw a line from this wrong facing C about an inch long and draw a correct facing capital C. The yolks of the shaft must be oriented the same way as these "C"s. That is they must be coplaner. If they ar not, the shaft will vibrate and make noticeable vibration at nearly any angle. Each joint accelerates out of phase with the other accentuating the issue. 3} All simple Ujoints create the acceleration deceleration issue. The shaft between them is supposed to be the only thing that is subject to this velocity change if the angle is greater than about 25 to 30 degrees per joint the vibration will shake things apart. I am not aware of the construction of the JD PTO drive, so others will need to fill this in, but the Knocking caused it. Jim
Upload one or more videos to your post. Photo filesizes should be less than 300K and Videos, less than 2MB. Formats allowed are gif, jpg, png, ogg, mp4, mov, and avi. Be sure to use filenames without spaces or special characters, and filetypes of 3 digits lower case.
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. [ About Us ]
Today's Featured Article - Show Coverage: Journey to Ankeny - by Cindy Ladage. We left Illinois on the first day of July and headed north and west for Ankeny, Iowa. Minus two kids, we traveled light with only the youngest in tow. As long as a pool was at the end of our destination she was easy to please unlike the other two who have a multitude of requirements to travel with mom and dad. Amana Colonies served as a respite where we ate a family style lunch that sustained us with more food than could reasonably fit into our ample physiques. The show at Ankeny
... [Read Article]
Latest Ad:
1964 I-H 140 tractor with cultivators and sidedresser. Starts and runs good. Asking 2650. CALL RON AT 502-319-1952
[More Ads]
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.