A risk that there's absolutely no need to take.
Using anything else is an uncertainty, a risk. In practice, I don't for a second imagine that using a generic ATF will cause a system to be reduced to scrap - but, I do suspect that seal compatibility is a real issue.įor me, the bottom line is that MB designed and developed the system to use a particular spec of oil.
It says 236.3 for power steering - it doesn't say that any other spec can be used. Not massive when compared with industrial systems, but a significant cost for a motorist. Having said that, the total cost of the power steering system on a car like a W124 will be over £2k if you buy the parts from MB. I do agree that power steering systems aren't particularly highly specified - they're designed to be as cheap as the manufacturer can get away with. You're veering back into pissing contest territory here. I do not wish to offend anyone or insult anyone or get into any arguments over it, and I am not about to be "converted" into believing things that I know for a fact are not so. I am not an oil / lube expert, I am not an MB expert, but I am not a ****ing idiot either, and I absolutely would not come out and say to other people "Sure, use ATF in your PAS and hydraulic suspension" unless I was sure, for a fact, that the person taking my advice would never, ever, lose out as a result of that.Īt this point I will now bow out of this thread too. On the other hand I've never seen a PAS filter finer than 60 micron, what's the point, the pump ain't anything special. I don't know what the filter spec is for the MB auto trans filter, but I wouldn't even consider a pattern part.
#Mb 236.6 atf full
Industrial hydraulic plant is completely **** about filters, 5 or 10 micron full flow full pressure filter banks are normal. The BIG difference between this kit and your MB auto trans is one of scale, that's all.Īn MB PAS pump is very, very, very crude by comparison. R0 is no real pressure, used for return lines, R1 is most bog standard hydraulics, R15 is up to 6,000 psi (400 bar) constant working pressure, and some of this stuff (gear splitters, various types of pumps and motors / vane / gear / etc, etc etc works at extremely high power levels, hundreds of kilowatts or even megawatts, constant working power, you are talking equipment with a capital cost in the millions of dollars, and you can run it all on ATF, in some applications you have to because standard high quality hydraulic transmission fluid will foam. In hydraulics you generally only come across R0, R1, R2 and R3, though you can also find R4, R5, R6 etc. I once had to buy 50 gallons of ATF for a ship stabiliser system, ouch, incidentally a development of the battleship gun stabilisers developed during WW2, and incidentally one of the guys on that (vospers) design team team taught me most of what I've forgotten about hydraulics.Īnd your MB PAS pump is, compared to your MB auto trans, about as sophisticated and precise as a villiers 2 stroke to a modern japanese superbike.
for example bronze parts which would react badly with chlorinated additives. There are some, very very very rare, special cases, where specific doped versions of hydraulic oils or automatic transmission fluids are specified, because the equipment in question has unusual properties or components. Please do not try to put words in my mouth or pick spurious examples by saying things like "well, avaiation gasoline meets or exceeds the spec for 4 start, and my mate burnt holes in the pistons of his Porsche", because avgas DOES NOT MEET OR EXCEED the spec for 4 star. Lubricating and Hydraulic oils are made to a specification, provided you MEET or EXCEED the specification, you simply cannot possibly do any damage, to suggest otherwise is to deny all the laws of physics, chemistry, engineering, etc. I gave an excellent example earlier, "All Claret is Bordeaux, but not all Bordeaux is Claret". I'm not a Mercedes-Benz expert, not even bloody close, but we are not talking about anything that is IN ANY WAY unique to MB, nor is it exotic, nor is it modern, nor is it special. Actually I can say that, as a time served and qualified Marine (mechanical) and Hydraulic Engineer, responsible at various times for equipment where downtime was measured in hundreds of thousands of dollars per hour.
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