royaub Posted June 13, 2010 Share Posted June 13, 2010 Hi all Can anybody tell me if it normal to have a very light hissing sound come from the brake servo/master cylinder? I have a bit of the powder coating come away from between where the master cylinder and the servo meets but I'm not sure if it has always made that noise. I'm having no problems with the brakes as far as I am aware. If it is a leak it is very tiny, can I get away with putting some sealant around it? or does it have a gasket on it? if so is it easy enough to do myself? I'm not a mechanic but I have rebuilt a hub/swivel housing and replaced bushes and ball joints so I am quite handy that way. Any help would be much appreciated, Thanks Roy ps I have a 1995 landrover defender 110 Quote Link to comment Share on other sites More sharing options...
western Posted June 13, 2010 Share Posted June 13, 2010 300Tdi servo do split around the master cylinder bolts/mount hole, move the cylinder clear & examine for a crack, if you find it's cracked, the only safe repair is to replace the servo. Quote Link to comment Share on other sites More sharing options...
royaub Posted June 13, 2010 Author Share Posted June 13, 2010 Hi Western it hasn't cracked by the bolt mounting holes it is the edge of where the two meet. It doesn't seem like it is an actual crack so much as where the powder coating has come away. It is the edge of the cylinder, where it meets the servo. Any other thoughts? Thanks for your help Quote Link to comment Share on other sites More sharing options...
Les Henson Posted June 13, 2010 Share Posted June 13, 2010 I've never heard of 300TDi servo's cracking. Where you describe - the two halves of the servo? Inside the servo drum is a big diaphragm, which is affected by the vaccuum created by the pump. The seal at that point is created by the edge of the diaphragm acting as the seal between the two halves od the drum, so if you have a leak there, then either there's a poor assembly fault there (most likeley), or the diaphragm has split - close to it's edge. You could try using something like RTV sealant/epoxy/araldite. Might work, but worth a try - considering the cost of a new servo. Les. Quote Link to comment Share on other sites More sharing options...
western Posted June 13, 2010 Share Posted June 13, 2010 page 490 doesn't show a gasket between the servo & master cylinder, the hiss maybe from the hose connection or the NRV where it fits in the servo body, there is a seal there. Quote Link to comment Share on other sites More sharing options...
western Posted June 13, 2010 Share Posted June 13, 2010 I've never heard of 300TDi servo's cracking our own BogMonster posted pictures of his sometime ago. here's the thread link http://forums.lr4x4.com/index.php?showtopic=14680&hl=brake servo &st=25 Quote Link to comment Share on other sites More sharing options...
Les Henson Posted June 13, 2010 Share Posted June 13, 2010 If you had limked to it initially, then it would have saved me getting typo finger, Ralph Les. Quote Link to comment Share on other sites More sharing options...
western Posted June 13, 2010 Share Posted June 13, 2010 If you had limked to it initially, then it would have saved me getting typo finger, Ralph Les. took me a while to find it. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.