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Rear Brake Pressure Regulator/Booster

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lorryloader View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lorryloader Quote  Post ReplyReply Direct Link To This Post Posted: 01 Sep 13 at 22:44
They are all new parts and a German co. Some one else on here was looking for one also and i suggested them, its not showing on there on line shop but they do reply to 'e' mails Good luck hope they can locate and at a reasonable price .
LT-45 HIGH TOP + LT-55-BEVERTAIL.Mercedes Atego tilt n slide with lorry loader crane.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote volition82 Quote  Post ReplyReply Direct Link To This Post Posted: 02 Sep 13 at 21:40
Thanks for that but another dead end.  E-mailed them last night and they responded today with a 'not available' Angry
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lorryloader Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 13 at 10:49
I really do hope you get sorted and for all our sakes.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lorryloader Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 13 at 13:51
Sorry if its already been mentioned but any one tried mr auto ?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lorryloader Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 13 at 15:41
Also have you tried the German LT forum-            ltfreunde.de/forum      i think.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote volition82 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 13 at 18:48
Tried Mister Auto.  They had a brake booster advertised but no picture and the VW part number was the same apart from the last two digits being the wrong way around.  Took a chance and bought it but it was a brake servo.
 
That's a good idea.  I hadn't thought of the German LT Forum.  I'll give that a try later tonight or tomorrow.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote woodyrich1965 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 13 at 21:47
there is an lt at haynes of challow scrapyard in wantage if any help
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Post Options Post Options   Thanks (0) Thanks(0)   Quote volition82 Quote  Post ReplyReply Direct Link To This Post Posted: 03 Sep 13 at 22:14
Thanks for that but I'm after a new one or if I have to re-condition the spare I have.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lorryloader Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 13 at 10:41
Originally posted by volition82 volition82 wrote:

Tried Mister Auto.  They had a brake booster advertised but no picture and the VW part number was the same apart from the last two digits being the wrong way around.  Took a chance and bought it but it was a brake servo.
 
That's a good idea.  I hadn't thought of the German LT Forum.  I'll give that a try later tonight or tomorrow.
I looked on there as well (mr auto) and could not figure it and gave up, your brave in ordering i hope you get your money back or is that yet another spare ! i know the story i have a shed full of spares !Best of luck on the German site now that would really wind me up waiting for the page reload and translate ! No broadband where i live ! 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote volition82 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 13 at 20:57
With Mr Auto you can pay a couple of quid extra and you can send it back for free.  Well apart from the money you had to pay up front.  A courier comes round and picks it up.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bohemian Quote  Post ReplyReply Direct Link To This Post Posted: 05 Sep 13 at 18:13
My apologies for creating confusion by starting and continuing a second thread on this Embarrassed

I've still no joy with it.  I'm beginning to worry as I can't get taxed without finding some sort of solution.

Any suggestions gratefully received
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Post Options Post Options   Thanks (0) Thanks(0)   Quote volition82 Quote  Post ReplyReply Direct Link To This Post Posted: 05 Sep 13 at 19:31
No worries.  There have been a few threads on this subject!
 
The way I see it is we have three options,
 
1) Buy a new one
2) Re-condition the old one 
3) Fit a different pressure regulator
 
Buying a new one looks next to impossible.  Fitting a different one is a possibility.  You can buy them for the new LT's for around £160.  The trouble is you need somebody who knows what they are doing to set it up.  They need to have the right pressure testing gear to set up and possibly change the spring.  I've looked into trying to find a brake specialist near me but I'm struggling on that one. 
 
Re-conditioning one looks to be the best option.  From the thread LTCamper89 found it looks like it's possible but somebody needs to be able to read German.  Or be brave enough to jump in.  I'm being a chicken and waiting to see if my van passes the Mot.  I think it will because as far as I'm aware mines working ok.  I can then forget about it for ten months or so, but that doesn't help you much.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Bohemian Quote  Post ReplyReply Direct Link To This Post Posted: 05 Sep 13 at 19:48
Cheers volition82.. at least I'm clearer where it stands now.. will have to think some more about it
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Post Options Post Options   Thanks (0) Thanks(0)   Quote LTCamper89 Quote  Post ReplyReply Direct Link To This Post Posted: 05 Sep 13 at 22:47
I had not really looked properly at the link I posted, yes I know very naughty, but it does seem straight forward, though a bit fiddly at certain points, the wire retaing ring for instance. 

I do not speak German but most 'words' can be broken down into ones that can be translated, so I will do the photographs over the weekend, maybe tomorrow given half a chance, and fill in the blanks.

My balance valve seems, allegedly, to be fine, fingers etc crossed, but I am sure it will give up the ghost sooner or later. LTFreunde are also trying to find the same item, so I suppose another 'conflict' is on the horizon over an obsolete VW part.

I sincerely hope that you chaps in urgent need find a suitable cure soon, but I am sure you must all be aware that the last one will go eventually, and if they cannot be rebuilt then replacement with another item is the only way out.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote volition82 Quote  Post ReplyReply Direct Link To This Post Posted: 13 Sep 13 at 19:46
I've been looking into this in a bit more detail, especially fitting a different new regulator.  A new mk2 LT regulator can be bought for £70-90.
 
I thought it would make sense to stick with the same make and model.  They look similar.  From what I can see the only obvious difference is that it has two outputs opposed to our one (from memory we have two inputs?  It's too wet to double check!) and it looks to be the wrong way round.
 
Obviously you would have to modify or make a new mounting plate, convert the single output and set it up.  When I first looked into it I thought setting it up would be difficult.  But on further investigation there doesn't seem to be much to it.  You can buy a brake pressure testing kit for around £100.
 
 
From what I can gather you just screw it into the bleed nipple of the wheel cylinder and you have your reading.  If it's that simple then there isn't much to it.  You adjust the spring, maybe change it for a bigger/smaller one until you get the required reading.  All the readings are in the manual so that's not a problem and you can buy different genuine springs from VW.
 
£90 for the regulator, £100 for the tester, £10-20 for a flaring tool and £20 for a few fittings and pipe.  £230 all in, cheaper than the original!  What does everybody else think, is my thinking sound?  Are there any obvious flaws in my brilliant plan? LOL
 
Thinking about it a bit more it would probably be easier to fit a pressure regulator from another vehicle which is the right way round.  I have a couple of questions I'm hoping somebody might be able to answer,
 
1)  The size of the brake line, is it metric or imperial?
2)  The size of the thread on the bleed nipples of the brake cylinders?
3)  If I fit a different pressure regulator and it's from a car do you think that will make a difference?
4)  If the brake pressure regulator is from a vehicle with rear disc brakes do you think that will make a difference? (If they are on rear disc cars/vans?)
 
I don't think questions 3 and 4 will make a difference.  I would assume that all pressure regulators are basically the same.  Much like rear wheel cylinders or brake caliper's they all work along the same line.  This one,
 
Appears to be the right way round.  It's from a french filth Saxo 96-04.  It looks to be smaller but I can't see that it would make much of a difference.  The size of the pipe doesn't change and it is either open or partly open.  It's just a case of how you set it up, I think?


Edited by volition82 - 13 Sep 13 at 20:03
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Post Options Post Options   Thanks (0) Thanks(0)   Quote volition82 Quote  Post ReplyReply Direct Link To This Post Posted: 13 Sep 13 at 20:04
Looking into it a bit more something like this might be better as there is room for adjustment on the regulator arm.
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote volition82 Quote  Post ReplyReply Direct Link To This Post Posted: 13 Sep 13 at 21:16
Starting to get a bit confused now.  Am I right in thinking that with our regulators the further the arm goes in towards the body of the regulator the more power you get to the rear brakes i.e. pushing the plunger gives more power?
 
On the regulator from the Saxo it has a smaller spring on the regulator it's self.  This spring pulls the plunger in.  This would make me think that on that regulator when the plunger is fully in there is less pressure to the brakes?  Unless the set up of the linkage on the car works the other way round?  All a bit confusing???  I hadn't considered that pushing the plunger in might have different effects with different regulators.  It would just be like the French to do things back to front LOL
 
The regulator above is from a Golf and from a little bit of googling it appears to work the same way round as ours.  Best stick with good old VW me thinks!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote mat_the_cat Quote  Post ReplyReply Direct Link To This Post Posted: 13 Sep 13 at 22:45
I reckon it's a good idea, and the way we'll have to start thinking in the future. Ideally someone like you will do all the hard work of finding out what works and then we can all copy it LOL
Originally posted by volition82 volition82 wrote:


1)  The size of the brake line, is it metric or imperial?
2)  The size of the thread on the bleed nipples of the brake cylinders?
3)  If I fit a different pressure regulator and it's from a car do you think that will make a difference?
4)  If the brake pressure regulator is from a vehicle with rear disc brakes do you think that will make a difference? (If they are on rear disc cars/vans?)

1) 3/16" pipe, or whatever the metric equivalent is. Pretty standard really. Fittings are M10 x 1 mm.
2) Rear cylinder bleed screw thread (and on the compensator) is M6 x 1 mm.
3) If it's from a car that won't have the same load range between empty and fully loaded, so the compensator may not be able to cope with the extremes. A case of suck it and see I think.
4) Disc brakes need more fluid volume than drums, so the compensator may be designed to allow more fluid to flow when it is at its maximum restriction. I'd try and stick to as similar a set-up as possible just to make life easier.


Edited by mat_the_cat - 13 Sep 13 at 22:47
Mid engined, 6 cylinder, turbocharged 2 seater - it can only be a VW LT!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote volition82 Quote  Post ReplyReply Direct Link To This Post Posted: 14 Sep 13 at 11:10
Cheers for the pipe/nipple sizes Mat. 
 
I'm not living in my van at the moment, I have quite a bit of spare time and my Mot is due shortly.  So, the timing is perfect for me to tackle the job.  If I plan on keeping the van then at some point it will have to be done.  So I guess I'm going to have to get on with it.  I suppose the worse case scenario is it doesn't work and I have to re-fit the old one.
 
The last picture I posted of a regulator is the design I like the look of best.  It seems to be the same one used across a number of VW/Skoda cars to at least 2010.  It also has the extra adjustment on it which is a bonus.  I'm hoping that because it has two ports in and two ports out it should cope alright.  The same design is used on rear drum and disc brakes which is also encouraging. 
I hadn't considered the point you raised in number 3.  I guess I need to get my spare LT regulator back and measure the amount of travel the piston in the regulator has.  Then buy a new regulator and measure the travel in that.  The trouble is a 1mm difference in the travel of the piston will translate into a lot by the time you extend it down the lever.  Really I need to play around with a variety of regulators to find one which works best.  Although looking at the new regulator closely the arm is held on by a nut and thread.  It looks as if you could use washers either side to increase or decrease the lever range.  I'm guessing more range wouldn't be a problem but less would.
 
How does the Mot test on the brakes work?  Do they have a set range of minimum and possibly maximum brake pressure for any vehicle?  Or is it a set range for a specific vehicle?  If it's the latter does anybody know where I would find it? 
 
I've got to Mot another car next week so I'll have a chat with the Mot guy and get his input.  The way I look at it is they aren't really going to know if the regulator is supplying 20% too much/less power.  All they will care about is that it is working and has a minimum brake pressure which is even across the back wheels.  The maximum I can't see as a problem because they are drum brakes and the power will never get close to the front whatever I do.
 
I was reading a thread last night about the regulators on Golf's.  The people who have lowered them have to alter the range of the regulator, basically reduce the power.  If they leave it as standard they have too much power going to the rear brakes and the back can end up swinging out.  Apart from the fact I can't ever see that as a problem on our slower than slow bricks LOL  Those cars must have passed their Mot's like that.
 
 


Edited by volition82 - 14 Sep 13 at 11:13
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Post Options Post Options   Thanks (0) Thanks(0)   Quote lorryloader Quote  Post ReplyReply Direct Link To This Post Posted: 14 Sep 13 at 13:45
If any good to you or you probably have this info ? In one of the latter edition VW owner handbooks in the special information section at the back it gives bar pressure ratings for axle  loads for all MK 1 LT's. Years back when i down rated a 45 to 35 all that was needed was replace the bump stops to smaller one's and adjust the load sensing valve to suit. I changed b/stops and only moved nut position for test to show clean area of old position and moved back after test ! (passed test) Ok this may have not been a smart thing to do ! But this was a strict H.G.V. test and they did not check it in the correct way with a pressure guage @ one of the rear wheel cylinder's bleed nipple as advised by h/book hope this helps get back to me if you need the value's in book.
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