Power Steering - fittings sizes *UPDATED WITH PICS*

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fcp
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 Anyone know or take a guess at what the size/ types of fittings are ? Looking to replace all the rubber and old steel lines with new hi-pressure braided nylon and new steel (I'm doing this now rather than replacing with MB solution because it will make future swap out to OM606 easier).

I've tried to find a spec for the LS2 box, and pump, but no luck so far. I'm looking for:

Type and size of :

Steel line > steering box fittings: one of the hoses is 12mm, the other 10mm, both steel with male fittings that look like AN- but may well not be).

The other aternative is to switch out the 90degree fitting that is screwed into the LS2 casing and replace with something else.. in which case what size thread for these?

Steel lines > steering pump - same question.

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Pistonhead
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Re: Power Steering - fittings sizes

 This is a question for Mercedes Technical to answer.  Should they decide to answer, and they do not answer quickly either, I will report back.

Cheers,

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Rakesh, Leicestershire. (EAST MIDLANDS)

fcp
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Re: Power Steering - fittings sizes

 Thanks Rakesh,  I can't imagine that they don't use a standard size. When you say 'won't be quick' - what does that mean typically? days, weeks or worse?

Threads are easy enough to measure, but angles on the male ends aren't  and from what know its easy to get JIC/AN fittings mixes with leaks the result.

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Do you or anyone you know have a problem with deer? We can help! Discreete and professional deer management services. Qualified, insured and provided at no charge in and around Hampshire and Surrey. References available. Please PM me for info. ____________________________________________________ Location: Farnham, Surrey :-) 1986 300D | 617.931  | VIN 46033227047955 ____________________________________________________

tony.bruegger
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Re: Power Steering - fittings sizes

The wonderfull LS2 [since 1960,up to 6.5 tonners] has particular fittings which even baffled Axel for an hour...hard to remove or reangle..study picture..does not disassemble as you wd think..all other fittings are catalogue at yr local pipe place

fcp
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Re: Power Steering - fittings sizes *UPDATES WITH PICS*

I'm almost there with the PS box swap and lines upgrade.

In the end I went for 316 Stainless lines (10/1.5mm high pressure, 12/1mm return) with Earls steel fittings on the high pressure side and slightly cheaper aluminium AN-8s on the return. 

All fairly straightforwward, though bending the stainless was hard work and killed my pipe bender in the end (at first I re-did them in mils steel as per the originals and then zinc chromated them, but having talked with Axel I decided to change the routing and while I was at it switched to stainless).

I've used weld-on AN fittings at each end of the hard lines (supplied by Torques). They were Tig'd onto the newly fabbed lines (I got a local tig shop to do that as I don't have a TIG set).

So far its all looking good and the PS box fitting side (replacing the banjos) was quite straightforward in the end (I'll post a how to with all parts and suppliers later).

What I am *still* stuck on though is the PS pump fittings, which having taken them apart are some kind of inverted flare+collar arrangement (M16/1.5 on the high pressure side, I think 45 degree flare) of which I cannot seem to find anyone offering off the shelf fittings for.

Original plan was to find an adaptor that went inverted flare>AN-6,  but the readily available AN-6 to inverted flare fittings don't seal properly (the don't screw in far enough).

Plan B then was to fab a replacement pire and flare end (matching the OEM just in stainless) wiht another weld-on AN-6 fitting at the other end. 

The trouble is that I haven't been able to find the spec for this fitting and so I'd a little hesitant about making it up without a spec (for example, can the collar be reused, is the flare actually 45 degrees etc).

Pics below of the flare fitting below - Perhaps someone here recognises it? 

(more pics on my flickr account:
http://www.flickr.com/photos/benstoneham/sets/72157632223285305/ )

__________________

Do you or anyone you know have a problem with deer? We can help! Discreete and professional deer management services. Qualified, insured and provided at no charge in and around Hampshire and Surrey. References available. Please PM me for info. ____________________________________________________ Location: Farnham, Surrey :-) 1986 300D | 617.931  | VIN 46033227047955 ____________________________________________________