Dashpot questioon.

[georgem]

The dashpot failed (lost its retard action) so I ordered and received a replacement from SLS.

I checked it against the great info in the Tech Manual and the dimensions are good HOWEVER it doesn`t seem to do the job.

The operating shaft only has a range of about 4mm (5/16?) and the retard action isn`t particularly strong so when I installed it it basically did nothing.

I disconnected the linkage so it only had to retard the air arm and it  still did nothing.

So.........is the new dashpot at fault, are the springs in my linkeage network too strong, is there a trick to installing it or all of the above/non of the above.

BTW, the old one that failed wasn`t a genuine MB - many years ago I took advice from the Tech Manual and ordered a GM of Ford part - for less than $30 it provided sterling service.......unfortunately I cannot find the paperwork from that purchase. The dimensions were the same as the SLS replacement however the retard action was much stronger with a greater travel.

[mrfatboy]

Are you talking about this part?  I bought this for my car and it works. Same part that has been recommended on this forum. You might have to do some fiddling but I got it to work.

https://www.ebay.com/itm/183412587444

[georgem]

Hi mrfatboy

Thats the part all right BUT it would have worked in your 280 because the bracket it sits in is slightly different - on a 230 the thread and the operating arm need to be longer as it uses a bracket shaped a bit like a "u"  the threaded end goes through a hole in one arm of the "u" and the operating  shaft through a plastic bushed hole in the other - overall it is about 100mm or 4ins long.

BTW, did the operating arm move far and how strong was the spring?

Good description here:
 https://www.sl113.org/wiki/Fuel/Throttle#Dashpot

cheers

[mrfatboy]

It was not perfect like original size but I got it to work. I had to be creative by adding another nut and stud to the dashpot to fit the bracket.

The dashpot works fine. It’s just the length of the stud to the bracket you have to play with. I don’t know if there is any extra considerations for a 230.