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  #16  
Old 10-22-2012, 01:38 PM
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More pressure data just in case

No pressure! But here's more pressure data


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My catatonic auto transmission wakes up... sort of-722_1-general-pressure-data.png   My catatonic auto transmission wakes up... sort of-722_1-vehicle-type-pressure-data.jpg  
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

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  #17  
Old 10-22-2012, 02:42 PM
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Thanks for all this info.

I am looking at the Brotherton DIY article on this. Is that the best resource?

Mercedes-Benz Transmission, Steve Brotherton, ImportCar, February 2002
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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22

Last edited by Zacharias; 10-22-2012 at 02:54 PM.
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  #18  
Old 10-22-2012, 03:01 PM
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I've not read it before - I'll have a skim through

I reckon you're the man to write up a really good DIY though!
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1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!
1961 Volvo PV544 Bare metal rat rod-ish thing

I'm here to chat about cars and to help others - I'm not here "to always be right" like an internet warrior



Don't leave that there - I'll take it to bits!
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  #19  
Old 07-24-2013, 04:51 PM
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Progress... sort of

I'm breathing life into this old thread as there has been some progress on the tranny in my 1980 300td. This is a .117 trans (came out of a 240d). I now have all forward gears functional (problem appears to have been a stuck governor), but the operating pressure reading makes no sense.

Immediate questions:

- on the 722.117/118 vacuum-control-only transmissions, is the test port right beside the modulator?

- if yes, what does a reading of 12 bar indicate? (yes, 12 BAR)

Thanks
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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22
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  #20  
Old 07-24-2013, 05:32 PM
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Vacuum, vacuum, vacuum...not only volume, but the correct corresponding transmission control pressures MUST be observed.
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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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  #21  
Old 07-24-2013, 08:04 PM
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re 1: yes, but the other two test ports are also in the neighbourhood, so best make a picture of where you've connected the pressure gauge.



The red dot shows where you measure modulation pressure. The blue dot is the working pressure.

re 2: 12 bar under what conditions?
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  #22  
Old 07-24-2013, 08:10 PM
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Quote:
Originally Posted by Zacharias View Post
- on the 722.117/118 vacuum-control-only transmissions, is the test port right beside the modulator?

- if yes, what does a reading of 12 bar indicate? (yes, 12 BAR)

Thanks
176.4 psi
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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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  #23  
Old 07-24-2013, 09:12 PM
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Quote:
Originally Posted by Govert View Post
The red dot shows where you measure modulation pressure. The blue dot is the working pressure.

re 2: 12 bar under what conditions?
Re 1: We tested where your red dot is (beside the modulator). My bad.

Re 2: Car idling in park, per the Wiki how-to article on this site.
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Mac
2002 e320 4matic estate│1985 300d│1980 300td
Previous: 1979 & 1982 & 1983 300sd │ 1982 240d

“Let's take a drive into the middle of nowhere with a packet of Marlboro lights and talk about our lives.” ― Joseph Heller, Catch-22
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