The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: georgesgiralt on January 07, 2014, 01:35:45 AM
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Hello !
Instead of changing my rear drive bearings I've bought a second hand one which would be perfect it it hadn't had a failed lip seal which will be replaced this week end.
The brake shoe fitted on the "new" drive is new but packed with gearbox oil.
Do you have a way to clean them or are they toast ?
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Petrol or spirit.
Then I would allow them to dry out. Give them a try and see how you get on.
Please let us know either way. I would suggest it is at least worth a try.
Give the shoes plenty of time and opportunity to bed in before you try and use them in an emergency situation.
Cheers
Rev. Light.
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When my brake cam o-rings failed and soaked my brake shoes, Monte mentioned a technique involving boiling the shoes and then skimming with ice
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OK
I'll do my homework and search the archives.
Will report if I'm successful ...
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When my brake cam o-rings failed and soaked my brake shoes, Monte mentioned a technique involving boiling the shoes and then skimming with ice
Usually, the oil will rise to the surface and you can skim it off with a paper towel wrapped around an ice cube -kinda firms up the oil for easier pick up.
Give it a try. You've got nothing to lose and several coins to gain.
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Another thing that comes to mind with brake shoes was a suggestion from a parts guy at my local dealership. He said that trucking companies will re-line brake shoes instead of replacing the entire unit (lots of metal in those things). If you can find a place that will do them, it might be cheaper than BMW prices.
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I have cleaned brake shoes. by boiling in washing powder.
The other new idea is when cleaning oily overalls, jeans etc. a pint of genuine coke added to the washing machine before washing works wonders it might work on your shoes as well. Something to do with the phosphoric acid in the coke.
Just give them a boil. Do not tell the wife when using her best pans :)
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Well, I've to shop for a pan...
The missus told me it was a case of divorce if I touch something looking like a cooking pan with my greasy fingers.
Will tell how the day went when done .
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I'm going to give this a try next week, the brake camshaft seals starting leaking again about 8 months after replacing them .
I've got a parts washer at work that I use .
My plan was to put a piece of wire on the shoes and let them sit in 175 F, 79 C water soap solution for a week and see how they turn out .
Also if you're looking for a container to boil them in, I've got a couple of large metal coffee cans that will hold two brake shoes without any problem, if you have one may work for you .
I'm also going to bevel the edge to the opening in the final drive case that the camshaft goes through, I'm sure I damaged the o-rings when reinstalling the camshaft, needed a good tap with a rubber mallet to get the camshaft into the case .
I did use a wheel bearing grease to lubricate the o-rings before reassembly .
Next time you have the cover off of the final drive, may want to bevel the opening in the cover on the inside .
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Removed the rear wheel off of my '81 R65 this afternoon, the leak isn't from the brake camshaft, the output seal is seeping .
Need to order one tomorrow after I get off of work and stop by the local BMW dealer on my way home .
Brake shoes didn't look that contaminated with oil .
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Even though they don't look that bad I'd still go to town on them, as any remaining oil could be driven further into the friction material by the heat and gasses developed during braking. With that said, if you can lock up the rear wheel then the brakes are good enough IMO.
It will be nice to hear how the both of you make out. Oil fouled brakes are a write-off for most people, but that aint exactly the airhead way, now is it? [smiley=bmw_smiley.gif]
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Still have to find a pan suitable for the job.... and not costing an arm and a leg.
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Still have to find a pan suitable for the job.... and not costing an arm and a leg.
2nd hand shops?
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Now, I'm considering using an oil can (5Litre) into which I stored some solvent which evaporated quite totally. Once opened it would make a suitable pan and already dirty ;-)
I wonder how the paint will look once put on the gas stove ...
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Georges, it's not the paint on the can you have to worry about, it's the soot on the ceiling and the lovely perfume you will make.
If you've got a flea market nearby you could find a cheap pot or pan. I once got a cast iron pan for 25 cents at mine. Wasn't even rusty!
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Boiling the brake shoes is a dangerous indoor sport. Try it at your peril. I used my Coleman camp stove... outside.
Does that that 5L oil can have the bottom soldered in place? Uh Oh.
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Experiment over for me, one of the shoes friction linings disbonded form the metal shoe .
So I need to get another set of rear brake shoes .
I don't think the hot water had anything to do with the disbonding, the other shoe is fine .
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Go to a truck repair shop and ask where they get the shoes re lined. They will rebond or reline your shoes for wayyy less than BMW ask for a new set.
I used to work next door to such a shop and, at that time, never bought OEM brake shoes...
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I've found EBC rear brake shoes for around $55US online free shippng .
Think I'll go with that .
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I had grease on the front brake shoes of my '64 Lambretta scooter. Tried everything; soaking for a week in degreaser, soaking in lacquer thinner, mineral spirits, etc. No luck.
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I did try using an ultrasonic cleaner about a year ago on a set of brake shoes, looked promising, but the sonic past of the cleaner quit and it was not worth the cost to repair it .
I was using Simple Green soap didn't foam up with use in the cleaner .
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I had a leak from my final drive onto my brake shoes. I cleaned them off with spirit and re- installed them. They still work after a fashion i.e. they still bite.
And they will go through the MOT with them. Perhaps they are not quite a powerful, but the I have twin disk Brembo setup on the front, where most of my braking is carried out.
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I had a leak from my final drive onto my brake shoes.I cleaned them off with spirit and re- installed them.They still work after a fashion i.e. they still bite.
And they will go through the MOT with them.Perhaps they are not quite a powerful, but the I have twin disk Brembo setup on the front, where most of my braking is carried out.
I'm not a fan of an overly powerful rear brake so I'd probably do the same.
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You know, when grease and oil dries out it gets really sticky! I figure that if I can remove most of the contaminants, the rest will eventually dry out and burn off.
I also don't see much use for the rear brake since it does only about 30% of the work. I guess for touring or sidecar duty, a powerful rear brake would come in handy, but for solo use, a disc is over-kill. The drum brakes have always been plenty for me.
I've cleaned up brake pads and shoes several times in the past and they worked fine afterwards. Don't recall what I used, may have been carb cleaner or laundry soap. Maybe Lacquer thinner. But afterwards they were light colored after a little sanding.