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CV joints

R

ridgelane

Member
How can one determine if a CV joint is worn to a point where it would be off balance and cause a PTO shaft to break? The u joints themselves are tight.
 
(quoted from post at 10:42:37 09/25/12) How can one determine if a CV joint is worn to a point where it would be off balance and cause a PTO shaft to break? The u joints themselves are tight.
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A CV joint & U joint are different animals. What do you have & on what machinery? If u joints, are they phased correctly?
 
I doubt that is your problem.If it was that bad you would 'feel' it.Keep looking.Did the three point arm strike the pto shaft while turning?(pretty common occurance).I did that 35 yrs ago,bent the shaft AND snapped the pto.does the slideing shaft need grease?
 
(quoted from post at 07:50:44 09/25/12) I doubt that is your problem.If it was that bad you would 'feel' it.Keep looking.Did the three point arm strike the pto shaft while turning?(pretty common occurance).I did that 35 yrs ago,bent the shaft AND snapped the pto.does the slideing shaft need grease?
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You don't wanna know how many times I do that or similar each year :roll:

CRS sucks....
 
Never seen a CV joint used on farm equipment a U joint yes but never a CV joint. Now if on a front wheel drive car yes those are CV joints. So fill in the blanks what are you working on almost bet it is a U joint not a CV joint
 
Yes they are putting CV joints on newer equipment these days.My C/IH 8530 inline baler has a CV on the 'tractor end'.Looks like a 'double' U-joint of sorts with a 'clutch' of some kind in it.Thing is,some time ago the thing "exploded",the former owner just welded it solid...I've had no problems.
 
My kuhn rake has a CV joint on the tractor end of the PTO shaft. I see them using them more and more equipment...
 
Check the distance between the end of the PTO shaft and the hitch hole. Should be close to 14 inches; I think that is standard on a 540 RPM pto. I have seen the CV joints on the bigger Woods mowers and the drawbar was too close to the PTO shaft and causing problems with the joints. Hope this helps.
 
Sounds to new for me LOL. Of course that is also why I asked what he was working on so that we could maybe help him help him self better. Very hard to help some one with on the info needed to do so
 
How often do you grease it and how much grease do you use?
It should be greased every 8 hours to flush the crap out.
Working in the dealership, we never saw trouble from the guys that were buying grease all the time. CV joints take way more grease. The theory with u joints was not to over grease them and blow out the seals.
CV is the opposite, use all the grease you can. When you get tired of pumping the grease gun, pump some more. Pistol style guns are junk. Two shots from a pistol grip is equal to one shot from a lever action.
 
See if there is metal shavings in the grease right where the ball meets the socket, the ones I have had go bad were in the ball and socket, if the PTO shaft is bent it will where the CV joint out in a hurry and CV joints are not cheap. If it is a mower conditioner or baler and gets a lot of use it pays to take the three point hitch arms off the tractor to prevent inadvertently raising the arms and bending the PTO shaft in a turn.
 
'nother thought-if the distance is too short,It could cause the shaft to bottom out,breaking the shaft.
 
The CV joints are on a Hesston 1340 rotary mower conditioner. I realize the machine is not really old. I"ve used this unit on the same tractor for the last 8 years. Measured the drawbar length, pto length all fall within the required specs.

The shaft on this machine has two CV joints, one at the tractor, the other right at the machine before attaching to the driveline that takes power to the back end to run the diskbine.

It is greased often and alot, more than I figured it really needed to be greased. The lower window on my 1066 is always covered in grease spots at haying time.

Thanks for the suggestions.
 
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