How are the Lange Stove Air Vents Assembled?

[Malloy1]

Hello-

I just purchased a red Lange 6303 (the one that has both the top and back pipe vent) for our cabin.

Question: how are the air vents assembled? Mine only had one nut and one acorn nut on the bolt (bolt[21]->nut[4?]->door[24]->air vent[26]->acorn nut[27]). This configuration doesn't allow the air vent to open.

The numbers are from the the exploded diagram (below-for the 6203 model, but I assume the air vent assembly configuration is the same as the 6303). Also, I assume #4, #22 and #25 are nuts?

Looking at the exploded diagram (below). Looks like the correct configuration (bolt[21]->nut[22]->nut[4]->nut[4]->door[24]->nut[25]->air vent[26]->acorn nut[27]). Seems to be too many nuts. I see the two #4 nuts would act as lock nuts on one side of the door and the #25 nut would lock down the bolt to the door. The air vent would be adjusted on the extended portion of the bolt and the acorn nut. Not sure why #22 nut would be needed?

Appreciation any help on this.

Paul