Pursuant to the "lesson learned" thread, I'm in need of the small o-rings for the valves on a later (turbo) style 617 vacuum pump. They're apparently very weird proprietary pieces and hydraulics/hose fittings-type places can't get anything equivalent to them (something about the section width being less than the thickness), so used original ones are in order.

If anyone has an old broken "parts" pump laying around, please send me a PM.

Thanks,
Tom

i looked around and couldn't find any, but there is a kit available, it is mercedes Number 000-586-17-23 fast lane shows the kit for around $70

This pump supplies vacuum to your brake booster.

Do you REALLY want to put used O-rings in it?

I had a pump go south on my '79 on the freeway at 70 MPH 3 years ago. You'll need all the weight you can muster to get the car stopped.

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Nate Stanley
(Currently Benzless)
1985 F-250 6.9l 170K
2009 SCION XB 36.5K
2003 LS430 78K
2012 Kubota B 2320

i drove for 3 weeks without vacuum because my pump failed and i had to wait for payday then order them. its not that hard to stop without power brakes. as for the o-rings,they are reusable.

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have no worries.....President Obama swears "If you like your gun, you can keep it

It's one thing when you know you don't have power brakes. It's when you think you have them but don't that things can get interesting.

Tell me about it......I had a booster fail......on my '79 300SD.......holy bejeasus is that a bear to stop without it.

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Proud owner of ....
1971 280SE W108
1979 300SD W116
1983 300D W123
1975 Ironhead Sportster chopper
1987 GMC 3/4 ton 4X4 Diesel
1989 Honda Civic (Heavily modified)
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Section 609 MVAC Certified
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"He who fights with monsters might take care lest he thereby become a monster. And if you gaze for long into an abyss, the abyss gazes also into you." - Friedrich Nietzsche

I purchased the above mentioned rebuild kit from fastlane - it included the thin o-rings. My old ones were still pliable so they went back in. I can't imagine a failure of a 'thick' o-ring would result in total loss of brake boost. I had 5-7 inches of vacuum with all three of the thin seals - still more vacuum than when one of the old valves disintegrated ( 0'" vacuum - the plastic remnants and tiny spring were sitting on top of the piston when I took it apart)

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tgingrich
'83 300TD 282k
'83 300D 239k
'82 300SD 204k
DFW

The reason the pump and hence brakes aren't working properly is because I don't have used o-rings in it. The rebuild kit does not include the proper thickness o-rings, and the pump won't work correctly without the originals. I still have one of the o-rings; it is still soft and pliable, should be good to go a while longer.

Surely someone out there has a dead 617 turbo laying around? I'll even buy the entire pump, if necessary...

Thanks,
Tom

What is the thickness of your original seals? I saved my old ones, but they were the same thickness as the seals in the o/h kit.

The originals are just shy of 1/8", so about 3mm thick. The current replacement seals are maybe 1mm. Sounds like you got a "good" rebuild kit; might you be interested in selling your old ones?

Thanks,
Tom