Tef20 injection pump vacuum belows?

[Mick Oz]

Can anyone tell me how much movement I should get in the vacuum pump belows on my Tef20's injection pump.
Like everything else on the tractor the injection pump has seized.
Using the manual I removed the governor from the drivers end of the injection pump and after a lot of soaking and very gentle fingertip pressure I got the governor pin/shaft to move freely and return under spring pressure.
The vacuum pipe from governor to inlet manifold was toast when I got the tractor, so I know that needs replacing.
The bellows is punctured and only the ring outside the rubber moves, the centre will not budge.
From the manual, I cannot tell if it is connected to the injection pump or simply rusted in place. I believe it should move.

 

[thepumpguysc]

Yes it should move.. see the cutout in the top right corner? Use a small screwdriver or pick to pry it out from there..
Once you get it free, & you want to take it off, there is a pin on the back side.. JUST ENOUGH room for a pair of needle nose pliers..
BE CAREFUL.. once you get the pin off & slide it out.. there are SHIMS in the center of it..
Your new bellows may or may not come w/ them.. just transfer them over to the new bellows.. good luck.

 

[Mick Oz]

I can see the cutout on the edge, thankyou. I will have another shot at it on Thursday and let you know how I progress.