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Classic Truck Discussion Forum

American Lafrance fire truck transmission

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matthies

10-02-2017 19:43:11




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A friend asked me to look at his old fire truck, this is an open station cab with a windshield. Anyway the transmission shift lever has a mushroom collar right below the knob and is connected to a rod that follows the lever into the transmission. And am wondering if this need to slide up in order for the trans to shift gears. The lever goes side to side but won't go into any gear and am thinking this is a locking mechanism, maybe so it won't be knocked into gear while pumping. Also the pin that holds the lever in is moveable and by removing this pin can I lift lever and lock collar/rod out and free up the lock to put truck in gear. Friend thinks maybe engine is seized and wants to make sure trans is free also.

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steve s. in pa

10-09-2017 18:05:39




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 Re: American Lafrance fire truck transmission in reply to matthies, 10-02-2017 19:43:11  
I agree that the part you describe is a lockout. It is certainly for reverse, and maybe used for low gear also. ( if they are in the same line) Most manufacturers got away from that type of safety device in the mid fifties, and used a spring loaded gate instead.



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John Saeli

10-05-2017 09:30:02




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 Re: American Lafrance fire truck transmission in reply to matthies, 10-02-2017 19:43:11  
Tell us more about this truck. Year? Gas or diesel? Mid ship pump? What I remember about the mid-ships, was that the tranny was put in high gear to run the pump, but on the outside pump panel was a lever that was shifted to disconnect power to the driveshaft, thus directing it to the pump. What Duner describes, I've only seen on Ford's or GM's, 4 speeds, not the larger trucks.



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Duner Wi

10-03-2017 06:44:56




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 Re: American Lafrance fire truck transmission in reply to matthies, 10-02-2017 19:43:11  
What you describe sounds like the reverse lockout.
What I remember is you pull up on lever to engage reverse. Crack the drain plug ans see if you have water in transmission.



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John Saeli

10-09-2017 13:20:22




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 Re: American Lafrance fire truck transmission in reply to Duner Wi, 10-03-2017 06:44:56  
Hey Duner!! Ever get the impression we are talking to ourselves?



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Duner Wi

10-09-2017 19:55:20




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 Re: American Lafrance fire truck transmission in reply to John Saeli, 10-09-2017 13:20:22  
Like my friend says, "I could talk all day and no one will listen". Thanks for the laugh!



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John Saeli

10-11-2017 08:16:55




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 Re: American Lafrance fire truck transmission in reply to Duner Wi, 10-09-2017 19:55:20  
No one ever listens to me, least of all my kids!! I was interested in that LaFrance because when I 1st joined our local Fire Co. 44 years ago as a kid, they had just taken out of service a '40 or '41 American LaFrance Engine. She had a big Flat Head V-12, dual ignition engine. Supposedly LaFrance built their own engines back then. I think it had a 5-SP tranny. I never got to drive it, but heard it purr some before they sold it. It had a 1,000GPM pump & they said she would really pump.

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