Brake Fluid Resevoir leak - Defender Source
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  #1  
Old November 26th, 2010, 05:54 PM
Lriwater
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Chuck Niskey
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Brake Fluid Resevoir leak

Howdy,
I have a brake fluid leak between the plastic resevoir and the master cylinder. From searching, I got a hint that there are some o-rings that may be the culprit. Could it be anything else? Do they sell the resevoir separately? To get to the o-rings, do I just suck out the brake fluid and all will be obvious at that point?
Many thanks in advance,
Chuck
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  #2  
Old November 26th, 2010, 10:24 PM
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Jeff Huff
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I had this issue a few months back and did the same research you have probably done. You can get a rebuild kit from AB (http://www.roverparts.com/Parts/STC491.cfm) or just buy a new one. Either one involves draining/re-filling the master cylinder and then bleeding the brakes.

FWIW, I opted to buy a new one from partsgeek.com (part number W0133-1853193) as they were the cheapest and I had it from them in 2 days.
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  #3  
Old November 27th, 2010, 01:16 AM
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Andrew J. Hutton
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The OEM master complete is a lot less hassle.
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  #4  
Old November 27th, 2010, 06:03 PM
Lriwater
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Chuck Niskey
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Thanks for the info. Looks like replacing the whole thing is the way to go.
Is the TRW Master Cylinder from partsgeek.com considered OEM, or what is the best source for OEM?
Cheers!
Chuck
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  #5  
Old November 27th, 2010, 06:23 PM
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Tom
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Quote:
Originally Posted by Lriwater View Post
Thanks for the info. Looks like replacing the whole thing is the way to go.
Is the TRW Master Cylinder from partsgeek.com considered OEM, or what is the best source for OEM?
Cheers!
Chuck
The TRW unit is a very good high quality unit, I purchased mine over 2 years ago with no worries since.
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  #6  
Old November 27th, 2010, 09:41 PM
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mark kellgren
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I just had the same problem and replaced mine. It was easy breezy.

Mine started as an overnight drip when the temps dropped down to the 40's. I park outside, and the onset of winter gets worn gaskets shrinking enough to drip. Good to find out now.

I ordered the the replacement tank. All I had to do was suck out the fluid, pry the reservoir out of the gaskets, then pull and replace the gaskets. The one that goes in the rear can get caught on the small pipe (you'll know it when you see it) but is easily worked on with some gentle teasing. once the gaskets are in, press the reservoir into place.

I made sure that I didn't suck all the fluid out, only enough to get down to the top of the gaskets. While the standard answer is to bleed your brakes, I didn't have to. Air is introduced into the lines only if you touch the brake pedal and cause the cylinder pistons to draw in from the absent reservoir. I filled the reservoir with fresh fluid, and then gave the cylinder plenty of taps to allow any air bubbles before the pistons to float to the top. If you don't have a thorough understanding of your brake system, then bleed your brakes when done.

I'll bleed the brakes in next week or so just to be safe, and purge out the old fluid, but brakes are normal and leak is gone.

BTW, the LR kit for the reservoir comes with a bunch of stuff that is not needed. I think it's because that reservoir is used in several different applications, and parts for all application are included. you only need the 2 round black gaskets.
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Old November 27th, 2010, 10:30 PM
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Quote:
Originally Posted by Lriwater View Post
Thanks for the info. Looks like replacing the whole thing is the way to go.
Is the TRW Master Cylinder from partsgeek.com considered OEM, or what is the best source for OEM?
Cheers!
Chuck
From what I read and heard the TRW unit is one of the best reproductions and I can tell you that it looks and fits perfectly. I would recommend calling parts geek to make sure you get the right part but if memory serves you need the one that I referenced (and is $1 cheaper). When I called, they gave me half off the shipping as well so it only cost me about $120 total
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  #8  
Old November 28th, 2010, 11:02 AM
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Chuck Niskey
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Thanks everybody!
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Old December 2nd, 2010, 04:47 PM
Lriwater
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Chuck Niskey
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Brake Fluid

So, for Brake Fluid, should I use Land Rover DOT 4, or can I get it at NAPA or Pep Boys?
Thanks!
Chuck
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Old December 2nd, 2010, 05:10 PM
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Jeff Huff
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I used fluid from a local store in mine

Posted from my BlackBerry using BerryBlab
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Old December 2nd, 2010, 05:42 PM
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Castrol LTMA
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  #12  
Old December 3rd, 2010, 03:38 AM
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Castrol LTMA
x2 although I am now a bit uneasy as they changed the formula.
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  #13  
Old December 3rd, 2010, 01:13 PM
Lriwater
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Chuck Niskey
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Thanks, what's the best source for the Castrol GTLMA?

Also, how does one bench bleed a master cylinder? Thanks for all the info so far.

Cheers,
Chuck
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  #14  
Old December 3rd, 2010, 08:37 PM
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Chuck Niskey
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I did this repair without any problems, except for dropping a nut in the engine bay. That set me back a bit trying to find it. Thanks for all the help!
Chuck
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