The venture unscrews from stove....
Take a look at the picture of part #112...That will give you a idea of how it comes out...It is threaded...Thanks Bob
The center is a hollow tube with a 20mm hex head threaded onto a jet holder (Bosch # XXXXX). The problem is how to keep the jet holder from turning when applying the required torque to loosen the threaded venturi holding the burner body in place,
See if you can spray some lubricant into it....You can also take a good size set of channel locks to hold is still with a piece of scothbrite to protect the finish...if i was there we could get it off...Just go easy on it....
Sorry - you do not understand the problem. Is there some tool to insert down through the venturi (#112 in the diagram) to hold the jet body (#119) from turning. I did apply torque and the jet body (#119) turned along with the hex part and the connecting tube (#120) broke and now when I turn the hex nut with a wrench both the venturi (#112) and the jet body (#119) turns but I connot hold the Jet body (#119) to loosen the assembly. I will not put a wrench to any othe burner without finding out how to keep the jet body from turning and breaking another tube (#120). So the question is - How do I loosen the 20mm screw top venturi without turning the assembly and breaking the attached tube?
Yes - I tried both directions - on the one that I broke - it loosened by turning clockwise.
Is there a special socket tool that you can insert down through the center of the venturi (#112) to capture and hold the jet base (#119)?
Yes sometimes you can free it by tighten then loosen...no special tool...from there its a matter of keeping 119 from turning underneath...