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Peculiar GM New Look noise

 
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NEW YORK OMNIBUS 2629




Joined: 18 Dec 2007
Posts: 7026
Location: NEW JOISEY

PostPosted: Mon Apr 15, 2019 7:39 pm    Post subject: Peculiar GM New Look noise Reply with quote

All:

I have no idea if this same sound was heard on the GM New Looks rostered by the NYCTA/MTA, but I do clearly remember the sound on NJ GM's, even though the last time I heard it was many years ago.

This sound was heard (this was especially noticeable if you were sitting towards the rear of the bus) when the bus was stopped at a light or making a stop.

The only way I can even try to describe this sound would be to say it sounded like a "harmonic wheeze", that came in "series" until the bus began moving again.

Any clues?

Thanks.....

"NYO"
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frankie



Age: 72
Joined: 01 Feb 2011
Posts: 721
Location: St. Peters, Mo.

PostPosted: Thu Apr 18, 2019 10:59 am    Post subject: Reply with quote

Wouldn't that depend on whether it was a 6V-71 or an 8V-71?
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NEW YORK OMNIBUS 2629




Joined: 18 Dec 2007
Posts: 7026
Location: NEW JOISEY

PostPosted: Thu Apr 18, 2019 2:33 pm    Post subject: Reply with quote

frankie wrote:
Wouldn't that depend on whether it was a 6V-71 or an 8V-71?


frankie:

As I have not the slightest idea as to what engines these Fishbowls were using, I wouldn't even hazard a guess.

The only think I can state with certainty, is that I only heard this sound on GM New Looks.......

"NYO"
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Q65A



Age: 62
Joined: 17 Apr 2007
Posts: 1693
Location: Central NJ

PostPosted: Fri Apr 19, 2019 8:25 am    Post subject: Reply with quote

A lot of the QTC Fishbowls on which I had rode in the 60's tended to idle very roughly when waiting at a light or at a bus stop.
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NEW YORK OMNIBUS 2629




Joined: 18 Dec 2007
Posts: 7026
Location: NEW JOISEY

PostPosted: Fri Apr 19, 2019 11:16 am    Post subject: Reply with quote

Q65A wrote:
A lot of the QTC Fishbowls on which I had rode in the 60's tended to idle very roughly when waiting at a light or at a bus stop.


Q65A:

The Fishbowls I rode in New Jersey years ago, from what I recall, seemed to idle (more or less) smoothly; I CAN remember, however, riding some of the suburban models (ex-PSNJ/ORANGE & BLACK, etc.) that could sound a bit more "rough" when idling.

And, as I had stated in my original post, that "harmonic wheeze" seemed pretty much confined to transit models......

"NYO"
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traildriver




Joined: 26 Mar 2011
Posts: 1223
Location: Queens, NY

PostPosted: Sat Apr 20, 2019 10:58 am    Post subject: Reply with quote

NYO--it is very difficult trying to imagine the sound from your description...
I wonder if the sound you are describing could be coming from the air compressor or some other pneumatic source? Perhaps the air suspension leveling valves?
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NEW YORK OMNIBUS 2629




Joined: 18 Dec 2007
Posts: 7026
Location: NEW JOISEY

PostPosted: Sat Apr 20, 2019 4:08 pm    Post subject: Reply with quote

traildriver wrote:
NYO--it is very difficult trying to imagine the sound from your description...
I wonder if the sound you are describing could be coming from the air compressor or some other pneumatic source? Perhaps the air suspension leveling valves?


traildriver:

Your suggestions would seem to makes sense, and perhaps you are right.

I have not heard this sound in over 20 years, when the very last of the "indy" Fishbowls vanished from my area.

However, I heard that peculiar sound too many times to count over the years to ever forget it....... Wink

"NYO"
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MaBSTOA 15



Age: 65
Joined: 27 Feb 2013
Posts: 633

PostPosted: Mon Apr 22, 2019 1:58 pm    Post subject: Reply with quote

I vividly remember that the GM TDH-5301s that Triboro Coach and Green Bus Lines had made a jet like whining noise as they travel down the street. These buses did not have a/c. Who knows what the whining noise was...

BTW, did your buses with the weird noise, did they have air conditioning? It could have been the a/c compressor
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NEW YORK OMNIBUS 2629




Joined: 18 Dec 2007
Posts: 7026
Location: NEW JOISEY

PostPosted: Mon Apr 22, 2019 3:46 pm    Post subject: Reply with quote

MaBSTOA 15:

I THINK (bit am not sure) that at least SOME of these New Looks MIGHT have been a/c equipped.

However, that would further complicate the issue, as I would hear this same noise during the winter months.

In really trying to jog my memory, I most recall the sound on ex-NHBL New Look transits, as well as the "semi suburban" (front door only, a/c equipped) New Looks that were originally operated by ORANGE & BLACK.

I am now going back now well over 30 years with these recollections......

"NYO"
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