On a 1984 300DT is the interior diameter 12mm or 14mm??

I posted pn's for both low and high pressure p.s. hoses I used a few years ago.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

The PAS return hose is 10mm ID on my 1999 W202 C250TD (OM605)

I need to know this too as my '82 300CD's return hose is beginning to weep .

Also, how long a piece ? mote than one meter ? .

Should I by aftermarket or Dealer/Classic Center hose ? .

TIA ,

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

Follow-up to post 2.
At home now, so I found the link.
www.peachparts.com/shopforum/diesel-discussion/349815-power-steering-hose-replacement-w123.html
Everything you need to know about power steering hoses.
Everyone else - feel free to help the group by posting such links after searching them out.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

Thank you Bill for posting the link. It seems that hoses are one of the bigger challenges with regards to dealing with classic MB automobiles. Any chance of you authoring a book about the art and science of hose making complete with photos? I'm sure you would have a ready audience for such a book......

The post I linked has photos and details. The high-pressure fittings are re-usable, and only tools needed are two box wrenches. Anyone can buy the hose material off ebay or from a local Tractor Supply.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

Thanx Bill .

I'm still not quite sure what to use on the return hose .

BTW : there's no pressure in the return line unless there's a problem .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

The fitting for the return line has an OD of 12mm. If you can find a 7/16 power steering hose that would be good. I tried a 1/2" one and it was too loose. I forced a 3/8" hose to the fitting and thats what im using now.

Attached Thumbnails

 

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'85 300D Cal 280,000 miles
'14 GLK 350 60000 miles

THANX ! .

I'd go bonkers looking at that every time I raised the bonnet.... .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

For those who didn't read the link I (thoughtfully) posted, for the low-pressure hose I used:
Parker 611HT-8, SAE 100R6, 1/2" ID, 400 psi.

The old return hose was labeled 'Parker Push-Lok 831-8 WP 300 PSI 1/2" 03/01/11'.

My recommendation was:
SAE 100R6-8: 1 fiber braid, 1/2" ID, 400 psi working, ex. Gates 8GTHXCTN

7/16" ID = 11.1 mm, so could probably force it over the 12 mmD fitting. 1/2" = 12.7 mm and is what my old return hose was stamped (original?). I have/had some transmission cooler hose (7/16" ID, I recall), so not sure why I didn't use it. Just ask for that at any auto parts and they'll cut to length.

Don't think you can get more details than what we gave, so just go out and do it.

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1984 & 1985 CA 300D's
1964 & 65 Mopar's - Valiant, Dart, Newport
1996 & 2002 Chrysler minivans

Pelican Parts - European Automotive Parts and Accessories - Porsche • BMW • Mercedes • Volkswagen • Audi • Saab • Volvo • MINI

For an '82, the car below my signature, I bought a meter of this one- Part #: 000-997-47-52-M21, by Continental/Contitech. I think it might even be enough for two lengths of return hose. I have a 47.5 cm piece left over, and I cut the hose that went in the car a little long. It seems like a fine pice of material- installed a few years ago, and holding up fine. I'm pleased with it. I replaced the clamps, too.

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Marshall Welch
Seattle, WA
1982 300D-T

Thanx Marshal and Bill ! .

I ordered up three meters of it and will prolly do all of my cars .

As a Journeyman Mechanic I'm not fond of forcing inch sized things to fit Metric applications .

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-Nate
1982 240D 408,XXX miles
Ignorance is the mother of suspicion and fear is the father

I did then what I knew how to do ~ now that I know better I do better

Ditto that; metric hose fits metric fittings EXACTLY, not so much when trying to use inch/SAE hose onto a metric fitting.

you need a caliper and tape measure.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.