2007 Ford Truck – Horn Project Progress 2012 10 07
Click Picture for lager image
This page may take a while to fully load as there are a lot of pictures and the instructions are all on one page.
 Ok, I have been at it again.All the diaphragms are identical |
|
 with a thickness of .032 |
|
They are not bronze, and may be a low grad of stainless as they show very little deterioration compared to the brass on the whistles. I can however pick them up with a magnetic and you should not be able to do that with stainless. |
|
I run these diaphragms through the buffer, sure am having a problem waiting for the new buffer, being careful not to get them hot so as not to change the hardness or warp them. The tree on the right came out of the short whistle and the one on the left came out of the longer one. |
|
 Here are close ups of the there from the short whistle. |
|
   And one of the one that came out of the longer one |
|
I tried two diaphragms in both whistles, they worked but the longer on now had symptoms like the shorter on had (did not blow right away).I tried one in both whistles and they seemed to like it. As this will be a vehicle mount unit and the compressor will be small, with two storage tanks, I think I will go with one diaphragm in each horn and reduce the pressure.The similarities’ between the Cunningham and Federal Signal Corporation continue. Note the two Cage Rings. They will screw into either whistle or function in either whistle.  |
|
There are differences however, below is the one that came off the Cunningham. Note that the outer ring is smooth, and when screwed onto the whistle does not need to be as tight as the one that came off the Federal Signal Corporation for it to function. |
|
The cage ring of the Federal Signal Corporation whistle has slot cut in the ring surface, I am wondering if they were put there for drainage as by chance the did line up with the weep hole on the horn when it was tighten down. This ring needs to be tighter than the one from the Cunningham. The Cunningham would function with its ring tightened by hand where the Federal Signal Corporation ring needed to be tightened about 1/8 turn more than hand tight to get the diaphragm to seal. This was true switching both rings on both horns. This 1/8 turn past hand tight does coinside with instructions for installing diaphragm and adjusting whistle, it states “ screw up the ring until the diaphragm just touches the whistle mouth without tension. Screw up an additional one-eighth to one-quarter turn and lock” |
|
| So you have answered the “S” and “F” question. The Cunningham horns have an “S” for screwed connections an “F” for flanged.These remain;I do not know how many diaphragms belong in each whistle, but through experimentation I think I will go with one in each, unless someone comes up with a reason not to. I would still like to know how they would have come from the factory.Why are the Cunningham and Federal Signal Corporation almost identical (parts are interchangeable).
Well it is now 11/04/2012. The first buffer I purchased off of e-bay was defective. The seller would not respond. I had to open a PayPal claim and wait their required wait time to get a settlement. I won the case, had to ship it back for a refund and then purchase a second one from Grainger. It does not have the HP that I would like, but have started to make some progress
|
|
