Hi All,

I have a Euro 1979 300D with factory SLS. I also have a Euro? 1980 300D with factory rear suspension ie springs and shocks and no SLS. Please note it does not have the provision for a pump in the front of the head.

Question is, can the head of the 79' be transfered to the 80' so the SLS can be transfered to the 80'?

Bump

Yes--You Could do that.......

But Much easier than stripping two engines, would be to adapt a combined SLS pump and P.S. pump from later W124 wagon or W210 wagon.

These have combined --but separate-- pumps that have a common 'low-pressure' (suction) side so common reservoir, but separate 'High Pressure' sides for each function.
--Should be relatively easy to adapt the W123 bracket to fit the later pump in its place....

I would use P.S fluid in the whole system, this should be fine with the SLS Actuators, and is whats used in the later cars--Ive seen all sorts of different 'oils' in the SLS systems over the years, --they don't seem to suffer even from completely wrong oils like Engine lube-oil being used!

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http://i190.photobucket.com/albums/z...0TDnoplate.jpg

Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....

59 kW (up to Aug 1979) and 65 kW (from Sep 1979) engines have different camshaft, prechambers, preglow plugs, pistons.
Also fuel pump.

If your cars hafe different engine, I'm not sure that "old" prechambers will work with "new" pistons - ???

Ah--Yes, An excellent point!

I THINK that Old Pre-chambers with the newer pistons is OK--But Not the other way round....

Even better case to use a combo pump off W124/210 then!

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http://i190.photobucket.com/albums/z...0TDnoplate.jpg

Alastair AKA H.C.II South Wales, U.K. based member

W123, 1985 300TD Wagon, 256K,
-Most recent M.B. purchase, Cost-a-plenty, Gulps BioDiesel extravagantly, and I love it like an old dog.

W114, 1975 280E Custard Yellow,
-Great above decks needs chassis welding--Really will do it this year....

Of course, Sir! At once I have not thought up...


Thank you!

WOW, what an answer! Right out of left field.

OK, let me get my head around this.
Replace the PS pump with the combined unit from the W124. Not having seen the combined unit, all I have to do is modify the bracket for the W123 PS pump to take the combined unit. You both feel the combo unit has enough room to fit in.
Is the combo reservoir in the same place as the PS in the W123 ie on the top of the PS pump or located external to the pumps?

I'm am really appreciative of this advice as everyone has told me SLS is so much better than without for my needs.

Actually the W124 pump is two pumps in one... they do not share sides. The power steering side uses power steering fluid, and the SLS / ASD side uses the green mineral oil.

A similar pump on Audi cars did share the fluid (they used the green mineral oil for everything).

-J

__________________
1991 350SDL. 230,000 miles (new motor @ 150,000). Blown head gasket

Tesla Model 3. 205,000 miles. Been to 48 states!
Past: A fleet of VW TDIs.... including a V10,a Dieselgate Passat, and 2 ECOdiesels.
2014 Cadillac ELR
2013 Fiat 500E.

Could I get a part no. for this as I have found dual pumps with only a single reservoir but no apparent dual reservoir. Is this correct or am I missing something?
Does the duel pump mentioned only go with the TD (as we are in a Diesel discussion forum) or is it for the TD and TE? Ditto with the W210 pump?

Is the W124 pulley or the W123 pump pulley needed?

Thanks

I believe although this solution has been suggested many times on this forum, to my knowledge, no one on the forum has ever adapted a 124 dual pump to a 123. You would be plowing new ground.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Thanks for that bit of info Kerry, I don't mind asking the mindnumbing questions then. Just hope someone with a lot more tech know how chimes in and has their stab in the dark about the process.

There are other options. Someone has used an electric pump. Someone suggested a convertible top electric pump.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

Have you got a link to the electric pump?

You'll have to search on it. I think Stevo knew something about it. May have been a picture of the pump on here at one time. Recent thread within the last 3 months discussing the various electric pump options and how to make it work.

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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13

There are threads on here and on Benzworld about using a convertible top electric motor for the SLS but the info is sparse but it is pretty simple and straightforward. Basically you fab up some lines to tie the electric pump in the SLS hydraulic lines, use a relay (I believe Ford starter relay was mentioned as being cheap and high AMP) and wire it to a switch for when you need to adjust the height using the SLS. It does not and should not run all the time as the pump isn't rated for it but you really don't need it to run all the time, only when you need to change the ride height. There are three wires on these pumps. One ground and two 12v ins. One for pumping one direction (lowering the convertible top) and one for pumping the other direction (raising the convertible top). You only need one direction and thus one of the two wires wired to the switch. Just make sure it pumps the correct direction that you have the flow of the SLS hooked up to.

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2009 ML320 Bluetec
1985 300CD
1981 300TD

Past Mercedes
1979 300TD
1982 300TD
2000 E320 4Matic Wagon
1998 E430
1984 300SD
1980 300SD