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Control pressure rod - for what? A1170701475

Started by ptashek, 27 January 2013, 02:09 PM

ptashek

A1170701475 is marked in the EPC as "control pressure rod". It's loose in my 450 and sometimes detaches from the throttle linkage assembly under the air filter housing. Looking at how it is routed I think it attaches to the transmission on the other end. But what does it do there, or wherever it actually belongs? What pressure does it control?

1993 "Pearl Blue" W124 280TE
1988 "Arctic White" W124 200T
1979 "Icon Gold" W116 450SE

JasonP


It controls the shifting points of your transmission.

From - http://forum.w116.org/mechanicals/%27control-pressure-rod%27/

Quote from: koan on 12 January 2012, 01:47 AM
Don't know what the linkage setup is on diesels but on petrol engines opening the throttle pulls the control rod forwards, suppose with the same basic transmission diesels would be the same.

Adjusting the rod longer so it is pushing further back makes the gearbox see/think the throttle is less open than it really is and will change gears at lower RPMs. Making the rod shorter does the opposite, gearbox sees the throttle more open than it actually is and will change at higher RPMs

EDIT: corrected the above when I realised I had the actions reversed,

koan

1979 300SD
Color: 623H "Light Ivory"
1979 300SD
Color: 861H "Silver Green Metallic"
1977 280 E
Color: 606G "Maple Yellow"
-------------------------------------------

Squiggle Dog

The control pressure rod controls at what pressure the transmission shifts. Adjusting it changes the RPMs at which the transmission shifts gears.
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1967 W110 Universal Wagon, Euro, Turbo Diesel, Tail Fins, 4 Speed Manual Column Shift, A/C
1980 W116 300SD Turbo Diesel, DB479 Walnut Brown, Sunroof, Heated Seats, 350,000+

ptashek

#3
Thanks folks. Looks like I've missed this in the search.

--> moved to the original thread: http://forum.w116.org/mechanicals/'control-pressure-rod'
1993 "Pearl Blue" W124 280TE
1988 "Arctic White" W124 200T
1979 "Icon Gold" W116 450SE