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Did you use original exhaust parts or did you have some made up new?

Look on page 573 of TM9-8024. We are missing the control lever lock. I have never noticed it before.

Is this what you are looking for? Are you missing the plate that the lever goes through? I may have one on the parts trucks.

Low air pressure switch to replace these.

Thanks topo!!! More work done on the low air pressure switch and I finally got it to work, until this rubber diaphragm split. The 60 year old rubber is not holding up to 90+ psi. Anyway, the reason I was not getting voltage to the buzzer was caused by two things. The top Douglass connector...

topo... could you tell me a part number for the one you have? I would like to add it to our parts list that we are making to post up for everyone as soon as it is finished.

Here are the internals of the two low air pressure switches I have. They seem simple. I am going to try to make one good one out of the two. The one that was originally on my truck is on the top. The one that worked for just a little bit is on the bottom. The next picture is them both...

Yes we can excuse it. I was surprised it worked the other day when I put it in, even though it only worked for a little bit. I may try to take one of the switches apart too and see if they can be fixed. Does anyone know of any new made low pressure switches that will work in place of these old...

I have been out pulling buzzers and testing with the multimeter. After trying both pulled buzzers, neither of them turned on, so out of curiosity, I started checking voltage. There was no voltage coming to the wire that hooks into the buzzer. So that lead me to the low air pressure switch...

Not yet. Mine are good for now. I have just read that they are prone to cracking and leaking but didn't know that they could be welded and reused.

Is that a weld on the lower piece? Can they still be used if they are welded?

Looking for ground was my first thought as well, but like you, I really have no idea. I didn't think a ground would be a problem since that buzzer looks like it has been in place for a long time. I am going to wire wheel the contact places when I mount up a replacement one to be on the safe...

Do we still need to see the inside of it then? Back to the parts trucks....

Haha! Well darn...I was hoping I wouldn't have to do that. If it wouldn't have gotten dark so quick I would have taken the buzzer off and wire wheeled everywhere it made contact with the firewall just to rule out the ground.

I am half way there on the air buzzer. The low pressure switch was replaced with one from a parts truck. The switch is good, does not leak air and made the buzzer come on for a little bit. The buzzer sounded weak, so I tapped on the outside lightly and it started to sound pretty good until...

As soon as I get a few more things found, I was going to figure out how to post the list into a thread titled "G749 Parts List" or something of the sort and ask a moderator to make it a sticky. I sent the most recent edition to your personal email just now. I used this for a breather hose since...

Here are all of mine.

Man you know your stuff!!! To the parts trucks it is.

Air Buzzer I have been working on the air buzzer today and now need to ask for some help. I am not understanding how it works or how to fix it, even with looking in the TM. This is on the driver side just below the dash on the left side of the steering column and I believe it is the air...

Looks good. What color are you using?