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John Deere Tractors Discussion Forum
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'50 JD B brakes ?

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B-maniac

08-16-2007 12:51:33




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Ther is an oiler cap and under it a reservoir cast into the brake castings on each rear brake. Please tell me where this oil lubricates. The inner bushing is , I presume, oiled by splash through the two holes in the housing where it protrudes into the case. The outer bushing? It's right under the oil res. but I see NO ports anywhere where this oil might get to it's target. I even filled it with solvent and compressed air and don't see any comming out anywhere. Does it "seep" around the bushings to oil the shaft or what? It's got me stumped (doesn't take much) but I would like to make sure this oil gets where it is supposed to before I put these brake pods back together. Open to any advise from you who know. Thanks in advance. (I've never seen this adressed on here before)

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Duane Larson

08-16-2007 18:42:59




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 Re: '50 JD B brakes ? in reply to B-maniac, 08-16-2007 12:51:33  
B-maniac,
Mike M is correct - the bushings are made from oilite and are impregnated with oil during the manufacturing process. Over years the oil disappears and should be replaced - hence the oil cups. A nice discussion of oilite bushings and their maintenance is at Link



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Mike M

08-16-2007 12:56:51




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 Re: '50 JD B brakes ? in reply to B-maniac, 08-16-2007 12:51:33  
Those bushings should be porus and it will soak through them in time.



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B-maniac

08-16-2007 13:11:09




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 Re: '50 JD B brakes ? in reply to Mike M, 08-16-2007 12:56:51  
Thank you Mike, I was thinking it might be you who would have the answer to my dilema. Next question would be..is the porosity visable to the naked eye? Should I replace the bushings for positive oiling? Any sure way of cleaning the surface? I would think that laquer thinner would at least penetrate through and since it doesn't appear to , then why would oil? Bushings seem in good shape , I have no confidence they will remain that way with what I'm seeing (or not seeing). Am I worried about nothing? Just looking for a little peace of mind from an expert whose been there. Thanks again.

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Mike M

08-16-2007 18:14:44




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 Re: '50 JD B brakes ? in reply to B-maniac, 08-16-2007 13:11:09  
You might try some air pressure on there with some solvent and see if it bubbles through ? You do also have the problem if it does get too much oil then it will leak out and get on the shoes. I think I had this on my one B when I overfilled those cavitys. I don't think I would replace them unless excessivly worn.



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