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Implement Alley Discussion Forum

tandem disc

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larry cook

03-28-2008 20:07:41




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just purchased a tandem disc, has ball bearings, have used a disc before but not with ball bearings. question is this, what is the proper way to lubricate the bearings? there are no grease fittings so i am at a standstill here. thanks for the help
larry cook




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thurlow

03-29-2008 19:09:20




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 Re: tandem disc in reply to larry cook, 03-28-2008 20:07:41  
As stated already, they're sealed bearings; I've had both kinds and don't know that one kind outlasts the other. I've seen some (A-C comes to mind) that have zerks in the flanges, but still use a sealed bearing and there's no way for the grease to get to the bearing. My experience has been that if you use the disc, you'll eventually replace the bearings. Did have a PKH off-set J D that wore the 24 inch cone blades down to the nubs without ever having to replace a bearing.

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Texasmark

03-30-2008 07:31:36




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 Hey Thurlow in reply to thurlow, 03-29-2008 19:09:20  
Beins you said what you just said, I bought a cone harrow last year and was wondering how to set it up. Don't have the number handy. 11' wide, medium to heavy duty chassis. Blades are about 22 inches diameter.

When you look at the cone, you (I) would think that it would cut best if the leading edge of the cone was aligned with the direction of travel. That way it could slice the sod like a coulter does on a moldboard plow.

This would require a very deep V of the front gangs. The main boom has no holes for the boom pins for this aggressive a V. This would also throw the cut material off to the side as the rear of the cone would be roughly 45 degrees off centerline. No biggie, just different than a regular blade.

If you look at the pins to set the booms (gangs) they are in about the same spot as they are on harrows with normally shaped discs.

Setting up the booms like that (shallow V ) means that the incoming dirt hits the back of the cone and for first tillage of heavy clay, I don't see this as the best way to get the blade to cut the sod.

Where did you run yours and what did you do with it.....break fresh ground, like in plowing or did you follow a moldboard plow and use it as a cultivator? What type soil did you run in?

We don't use moldboards down here as the heavy clay just gums them up. Have to have a rolling disc so we use a disc harrow as primary plowing implement or a thing called a "one way" which is a string of rolling discs on a boom also, but there is a tail wheel to counter balance it and it only throws dirt "one way".

Thanks,

Mark

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thurlow

03-30-2008 10:14:24




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 Re: Hey Thurlow in reply to Texasmark, 03-30-2008 07:31:36  
I claim no expertise, but many years experience; not sure I understand your question, but every disk I ever pulled .....the more angle (to the direction of travel) in the gang(s) the more aggressive the cut. This thing I had was a monster; similiar to the old Rome disks. They were typically called off-set or (locally) new-ground disks. Only used it in sod.....changing from pasture/hay field to row crop or in newly cleared...from timber..... fields. I've forgotten, it was about 9 ft; bought it to pull behind a 4020 with 15 inch duals; it worked better behind a 120-plus HP tractor, although it needed to be run at 4 MPH or less. The outside blade on the back gang left a deep furrow; in use, we used it much as you would a breaking plow, filling up the furrow from the last pass with the new pass.

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Texasmark

03-31-2008 09:00:11




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 Re: Hey Thurlow in reply to thurlow, 03-30-2008 10:14:24  
Thanks. I think they call what you identified an "offset". Mine is just the straight tandem disc harrow; V front and V back.

I just bought the disc last year and I don't have any "virgin" sod to breakup so it may be awhile before I use it again. But when I do I will have to experiment to see what works best. Just wondering if you had any advice.

Mark



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Spritzer

03-29-2008 07:01:14




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 Re: tandem disc in reply to larry cook, 03-28-2008 20:07:41  
The needle is not intended to PENETRATE the rubber seal, but rather to slip between the seal and the steel shaft- - -and then lubricate. Gently, though, so as to not damage the seal.



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johns48jdb

03-29-2008 04:55:53




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 Re: tandem disc in reply to larry cook, 03-28-2008 20:07:41  
i've seen a needle that is made to fit on the end of a grease gun that is meant to be used to poke through the rubber part around a seal to inject greease into a bearing. i would think that making such a hole would only open up a place for dirt to get in. if you have a bearing that is making a racket and just want to get it quite until you can fix it right you might try the needle trick.



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awhtx

03-28-2008 21:51:03




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 Re: tandem disc in reply to larry cook, 03-28-2008 20:07:41  
They are sealed bearings and were permanently lubed upon assembly. No grease needed nor can it be added if you want to.



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larry cook

03-28-2008 22:16:48




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 Re: tandem disc in reply to awhtx, 03-28-2008 21:51:03  
thanks for the information, i hadn't ever run across the ball bearing setup before. always had a fitting to grease, guess i can quit thinkin bout it now. once again thanks
larry cook



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Texasmark

03-29-2008 08:36:52




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 Re: tandem disc in reply to larry cook, 03-28-2008 22:16:48  
If you were to disassemble that sealed bearing you will/should notice about 3 rubber seals between the balls and the outer hub. Won't find that many on non sealed bearings with zerks.

Grease is soap and oil. Over time the soap dries out and shrinks and can render the grease useless.

One of my JD disc harrows have one type and the other the other. On the sealed bearings I use motorcycle chain lube in a spray can and very carefully prise up the edge of the rubber seal and shoot in under it. Then spin the gang several times. You can tell the difference if you try to spin it before and then spin it after you treat it. I have conducted tests of bearings with dried grease and the chain lube softens the grease and makes it pliable and seems to restore the lube in the bearing.....haven't lost a bearing since I started doing that with all my sealed bearings.....in particular my sealed bearings on my baler, especially on the rollers.

Course most just have a dust seal and it is easy go get the spray under the seal without any prising. The ones that waller in the dirt have extra protection.

HTH

Mark

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