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MG MGA - Red Brake Grease

Well I have started a complete brake job on my "A" Coupe. M/C resleeved...new brake lines...new brake shoes and a complete brake cylinder kit from Victoria British. All of the brake cyl are lubricated with a red grease. I know the is a special compatable lube for the rubber seals but what I would like to know is.....do I remove this lube before installing the cyl"s ...if I leave it on the cyl's will it disolved when I put in the brake fuild.....and if it stays on the cly" is it going to cause a problem with the different types of brake fluids avaiable. Gord
Gordon Harrison

Hi Gord. My understanding is that the red grease prevents corrosion of metal parts, and preserves rubber seals during factory assembly. I believe that this grease is also supplied as aftermarket merchandise to be used specifically as a hydraulic system "assembly lubricant", whenever hydraulic components are being rebuilt. Personally, I have never removed this red grease from any of the new hydraulic components that I have ever installed, and have had no hydraulic problems. I have been using silicon fluid in my system for about 20 years. I would think that "brake fluid compatible" rubber grease would dissolve when brake fluid was introduced into the system, but am not positive. I suppose if it is a concern, that you could dismantle the hydraulic parts in question, and remove any red grease that you feel is excessive. Alternately you could remove all the red grease, and re assemble the hydraulics with whatever type of brake fluid you will be using. Hope this helps! Glenn
Glenn

Hi

It's 'rubber grease' , don't wipe it off, it used to be supplied in repairs kits. I wouldn't assemble a brake cylinder without it


Terry
Terry Drinkwater

Glenn / Terry, Thanks for the reply. I will leave it there. I see I can buy the same stuff from Moss. When I am rebuilding my resleeved master cylinder, is it recommended to use it there or just use brake fluid for a lubricant? Now if I could only find the box containing the four brake adjusters I would be finished . Thanks Gord
Gordon Harrison

Gordon, use only brake fluid to lubricate the internal parts of the master/slave cylinders. The red rubber grease is used to coat parts that are exposed to the outside. Use it to coat the inside of the rubber boots and the parts covered by the boots.
John H

Hi John. I did a bit more research on the net regarding red rubber grease. Rubber brake grease is apparently made from a castor oil base, and is completely safe for use with both natural or synthetic rubber seals. It is highly recommended as a hydraulic cylinder rebuild lubricant in automotive braking systems. It is therefore useable as a rebuilding replacement for any brake fluids that would normally be used to lubricate rebuilt automotive hydraulic parts. This grease protects all metals from rust and corrosion. Additionally, this red grease does not deteriorate rubber seals over time, like some brake fluids do. This makes the use of red rubber grease ideal for assembling hydraulic components that will be in storage for considerable time, before being used. It would therefore be ideal for people involved in long term restoration projects. Cheers! GLenn
Glenn

This thread was discussed between 11/02/2006 and 14/02/2006

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