Load sensing Valve LT35. |
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BobL
Not Quite Newbie Joined: 20 Feb 16 Location: Suffolk Status: Offline Points: 21 |
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Posted: 08 Jan 17 at 22:08 |
Hi All. I have a LT35E LWB panel van still working ( or was ). MOT is just coming up and a health check showed the Load Sensor leaking. Evidently they are now totally not available new , reco or second hand.
I have heard that there is a repair using new O rings or alternatively it is possible to fit a load sensor from a Ford Transit with an adapter plate. Has anybody any experience of either of these please. I love my old van and want to keep it on the road as long as I can. Cheers. BobL
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tellytubby
Groupie Joined: 29 Mar 16 Location: Glasgow Status: Offline Points: 154 |
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tellytubby
Groupie Joined: 29 Mar 16 Location: Glasgow Status: Offline Points: 154 |
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Also there is/was a chap on German ebay doing a recon service. Certainly was still doing them last year. Could be worth a browse.
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BobL
Not Quite Newbie Joined: 20 Feb 16 Location: Suffolk Status: Offline Points: 21 |
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Thanks for the info. Loads of reading here that I could not find on the site. I have found the German repair article and Google has done a translation ( or nearly ), pretty good though.
I have the unit off, teased the bleed nipple out OK and the large nut off at the back. Ordered up the O rings and now trying to sort out how to get the spring clip out of the plunger, piston end and find some straight threaded M10 grease nipples. Looks like I have committed myself to try a repair.
Try to keep you informed. Don't want the old LT to go the same way as the dinosaurs. |
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LTCamper89
Vanorak Joined: 18 Apr 12 Location: The Toon Status: Offline Points: 4285 |
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Good luck.
Use Search>Advanced Search> in the top right. This has been covered recently and on numerous other occasions but tellytubby has covered the basics. There is one thread about using a modern unit which requires very little fabrication, a flat plate with some holes.
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1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music
VW LT Camper not Cramper ....at least the roof is not rusting away.... |
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BobL
Not Quite Newbie Joined: 20 Feb 16 Location: Suffolk Status: Offline Points: 21 |
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Operation complete, it wasn't too difficult. Pistons all freed off and new O rings fitted. All seemed to be OK but after a 10 mile journey it is weeping a bit. The German site said the old cup/U seal can be used again as it rarely leaks. It offered no dimensions or supply routes for a replacement. I therefore reluctantly put the old one back . I need to find a replacement seal. I intend to ring around tomorrow. Any advice gratefully received. I may have errors in my measuring but I reckon it needs to be 4.5mm thick, 7.5mm I/D , fit in a cylinder 14.5 I/D and be OK with brake fluid.
I realize I should have posted this in Tech, sorry admin. I can move it over if you wish.
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BobL
Not Quite Newbie Joined: 20 Feb 16 Location: Suffolk Status: Offline Points: 21 |
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First port of call was Past Parts at Bury St Edmunds as I know they do remanufacturing of brake parts. The were prepared to have a look at it. I took it in, they said it was faulty and they wanted a couple of days to find a seal to fit or have one made up. It actually took half an hour so I picked it up today, put it on and so far so good. watch this space.
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LTCamper89
Vanorak Joined: 18 Apr 12 Location: The Toon Status: Offline Points: 4285 |
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Excellent news.
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1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music
VW LT Camper not Cramper ....at least the roof is not rusting away.... |
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geraldus
Not Quite Newbie Joined: 01 Mar 13 Location: Trellech Status: Offline Points: 12 |
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I have same van same problem so keen to follow your efforts, if that's ok.
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LT35Sunny
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BobL
Not Quite Newbie Joined: 20 Feb 16 Location: Suffolk Status: Offline Points: 21 |
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Hi Geraldus.The van is in for MOT, a brake check and a stubborn track rod end renewal now. I have written it all up and if successful I will disclose all. If you are pushing time I will send you all I have so far before it is proven good if you private message me.
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geraldus
Not Quite Newbie Joined: 01 Mar 13 Location: Trellech Status: Offline Points: 12 |
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Thank you Bobi,
There is no rush so whatever you have to share, in your own time will be fine Geraldus |
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LT35Sunny
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BobL
Not Quite Newbie Joined: 20 Feb 16 Location: Suffolk Status: Offline Points: 21 |
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Hi All. MOT success today so back on the road again. The valve repair is successful so far. I have it all written down with pictures and is in a word file 250 KB. I have tried pasting it here but the pictures won't show. I will post it with pictures if somebody can tell me how to do it. ???
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LTCamper89
Vanorak Joined: 18 Apr 12 Location: The Toon Status: Offline Points: 4285 |
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Use the Member Control Panel, top left, to upload images or use a link to Photobucket or similar. there is a limit on image size of 100MB, I think.
There are a couple of tutorials on here too.
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1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music
VW LT Camper not Cramper ....at least the roof is not rusting away.... |
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BobL
Not Quite Newbie Joined: 20 Feb 16 Location: Suffolk Status: Offline Points: 21 |
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Hi All, I have a word file with pictures ( or links to ) ready to share but it won't all go on. Stuck now, Any ideas? Edited by BobL - 03 Feb 17 at 07:35 |
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LTCamper89
Vanorak Joined: 18 Apr 12 Location: The Toon Status: Offline Points: 4285 |
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Pasting the words and uploading the images is the only way to do it.
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1989 LT28 2.4D Saviour of 6Music, well one of them. Now playing http://www.bbc.co.uk/radio/player/bbc_6music
VW LT Camper not Cramper ....at least the roof is not rusting away.... |
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BobL
Not Quite Newbie Joined: 20 Feb 16 Location: Suffolk Status: Offline Points: 21 |
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.So many hits on this there must be several leaky valves out
there. These are the components I used for the repair.
The correct size of O rings needed are stated in the Wabco manual for the valve and are large piston 2.4 X 13.3mm bore, smaller brass piston 2.4 X 5.3mm bore and the one on the plastic piston is 2.4 X 4.3mm bore. These are all available online from WWW.simplybearings.co.uk Bought in packs of 5 and are classed as Nitrile 70. . The cup seal can be sourced from Past Parts of Bury St Edmunds http://www.pastparts.co.uk/ Telephone 01284 750729. Ask for part number S9343. This is OK using Dot 4 brake fluid; if you use anything else ask their advice as to compatibility. This firm also supplies a perfectly fitting rubber dust boot, part number PPL 17-7553. This company have suggested that they may be prepared to service the valve for you, best to give them a ring. I will post my notes on how I did the repair when I can find a way of posting it. It may help somebody wanting to try the repair themselves. Best of luck, it worked for me. Richard. |
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earthvisitor
Not Quite Newbie Joined: 30 Dec 14 Location: Bournemouth Status: Offline Points: 28 |
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Richard, very useful write-up - not least for the part numbers and suppliers details. Many thanks.
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geraldus
Not Quite Newbie Joined: 01 Mar 13 Location: Trellech Status: Offline Points: 12 |
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Thank's from Gerald. That will help me get mine serviced I hope. Bobl means people in Welsh. Did you know?
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LT35Sunny
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BobL
Not Quite Newbie Joined: 20 Feb 16 Location: Suffolk Status: Offline Points: 21 |
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Hi All, Always my advice on jobs like this especially where brakes are concerned is to get the experts/ professionals to do it like Past Parts http://www.pastparts.co.uk/. They have magical methods of repairing cylinders if it is needed. However if like me you are forced through necessity into doing the repair yourself I made a few notes that may help you out. Our mutual friend Tim managed to post them here.
A further note here. I managed to get the wire snap ring out without damage that holds the main piston in. You may break it getting it out. I took some measurements of it. The wire thickness is 1.05 mm O/D 15.5mm. It needs to be that size. A normal circlip does not work as it has to allow the rebated part of the piston to come past it. I found one on Springmasters that I reckon is the correct one but did not buy it. Part number RBM 0140 wire 1mm O/D 15.2mm I/D ( bore) 14mm I measured the cylinder bore at 14.46mm. Trouble is it has a minimum order and sold in packs of 50. But it is a place to start. Richard.
Edited by BobL - 09 Feb 17 at 07:27 |
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Tiggerandfish
Groupie Joined: 16 Aug 15 Location: Gloucestershire Status: Offline Points: 217 |
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Apologies for replying to an old thread .
A huge Thank you to others on the forum that have put loads of detail on this topic - it’s really useful . Just one question on the o ring sizes as I’m just about to order mine as my valve has decided to leak and my LT IS my daily transport . The simply bearings website gives 2 options for the o rings - outside and inside diameter. Does the sizes of the o rings in the write up of 13.3 , 5.3 and 4.3 refer to the inside diameter ? Again many thanks for all this detail Simon |
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Simon
1985 LT 28 2.4D |
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