That belt tensioner again

[mick59]

I recently had occasion to remove the belt tensioner from our W124 300 TE wagon.: when I tried to tension the belt I only achieved a clicking sound from the adjuster nut At removal the belt was reasonably tight.
I obtained a replacement Tensioner unit and noticed that the spigot at the rear of the tensioner was 90 degrees different. I replaced the unit only to find that the belt was way too loose, almost as if it needed another pulley wheel. No matter how I installed the unit every time I came to the point of tension against the bracket, the adjuster had reached its limit of travel on the threaded bar. Again almost as if something was missing but I had not been malicious with a hacksaw. I have had this unit,and the original, in and out of the car so many times now, but I feel that I am missing something really simple.
The belt that was removed is 2240mm, the standard apparently is 2260. I have replaced this with a 2200mm belt. I have resolved the problem by using a piece of box spanner to form a bridge between the bottom of the adjuster and the bracket, effectively lengthening the adjuster rod. The belt is now tight. However this is not a total solution and I would welcome any suggestions as to what could have happened As I stated I feel that it could be something obvious. Also to those who study this sort of thing why did Mercedes choose to use such a complex device to perform such a simple operation. There is a perfectly good idler wheel on the other side which only needs to be on an adjustable bracket to make it all so easy.
Hope this makes sense sorry about the length.

.

 

[Bolide]

If the belt that came off was 2240, I'd replace it with another 2240

For each car there's an aircon and a non-aircon belt length. The length is marked on the belt but it may be dificult to read on an old one

Nick Froome
www.w124.co.uk

 

[mick59]

Thanks for that Nick. The belt length is not the problem. The problem was that as soon as the adjuster nut started to do the job of tensioning, it reached its limit of travel on the bar and the belt was still way too loose.

 

[eric242340]

Belt tensioner

Hi Mick, maybe these will help.

 

[eric242340]

Thumnails

Whoops - wrong one wait a minute

 

[eric242340]

tensioner

try again, maybe I can get it right - havent uploaded attachments before.

 

[television]

try again, maybe I can get it right - havent uploaded attachments before.

Eric, go to Attachments,click browse and find the file you want to upload,when you have found it,open it,then click upload. It will then appear with the number of the file that you have uploaded.

In between times the picture of you is very nice.

Malcolm

 

[eric242340]

Upload

Eric, go to Attachments,click browse and find the file you want to upload,when you have found it,open it,then click upload. It will then appear with the number of the file that you have uploaded.

In between times the picture of you is very nice.

Malcolm

Thanks Malcolm Im having a sense of humour failure here, my base computer programme is in Chinese/// The wife uses the computer as well. So I have to use translation software to do anything.:sad:

 

[eric242340]

tensioner

Try,Try,Try again, and ill get there if Malcolm doesent make me laugh agin, be patient with me. Malcolm I dont know what im doing wrong here but I have the pictures and have resized them but when I say upload the internet goes crazy and I simply sit and wait, but JPG does not give sizes?

 

[eric242340]

tensioner

OK try again, I hope it works this time

 

[Blobcat]

OK try again, I hope it works this time

From the FAQ section

To attach a file to a new post, simply click the [Manage Attachments] button at the bottom of the post composition page, and locate the file that you want to attach from your local hard drive.
After posting, the image attachments may display a thumbnail, depending on the forum settings. To view the contents of the attachment (if it is not already displayed) simply click the filename link that appears next to the attachment icon.

 

[eric242340]

that belt tensioner

From the FAQ section

thanks for the help blobcat and I will try again

 

[eric242340]

tensioner

From the FAQ section

I msust be doing somthing wrong, it simply does not upload, maybe the size is wrong?

 

[eric242340]

OK I will try again hope it works

 

[eric242340]

OK I will try again hope it works[/QUits
its still not right, would someone give me advice on how to size the attachment, the one I have posted is not viewable.

 

[television]

OK I will try again hope it works[/QUits
its still not right, would someone give me advice on how to size the attachment, the one I have posted is not viewable.

you can use the Email function to compress it and then put it back into your computer.

I had all of the problems that you are having once.


Malcolm

 

[eric242340]

you can use the Email function to compress it and then put it back into your computer.

I had all of the problems that you are having once.


Malcolm

Email function what is that?

 

[television]

Email function what is that?

if you want to Email it youc computer will ask, we can compess the file,you say OK,then once compressed save it and use it here to upload.

Malcolm