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1943 Cummins H genset, How would you shut it down?

Posted By wrenchguy Wednesday, September 25, 2019 2:38 AM
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wrenchguy
 Posted Wednesday, September 25, 2019 2:38 AM
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I believe its set up at the factory with consent speed governor, throttle position "idle" is 1000 rpm and "full" position is 1225 rpm. It is physically impossible to lower rpm using and adjusting the factory linkages. It has its original single disk pump with the fuel shut off cock. Using this fuel shut off (known in the truck manual as "emergency shut down") will lower rpm to 400 rpm then a shut off. The machine also has decompression lever setup.
This is what i do now, I use fuel valve to lower rpm to 500 rpm, at this point i decompress it holding the lever out and then i move the fuel valve back to full flow. I note white exhaust, this indicates raw fuel in the cylinders. Doing this i believe i'm leaving fuel in the disk pump not "running it dry". I always decompress and get it rolling when starting.
This ok with you guys who may know? Thanks 4 any help.
5 minute video of walk around and start. https://www.youtube.com/watch?v=kIa2boBNTSA&t

Throttle lever will not move to stop, factory linkages won't let it.


woodward governor.




jimfols
 Posted Wednesday, September 25, 2019 1:49 PM
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I cannot offer any help but thanks for posting the video.

Over 60 Years of Service Dedicated to Trucking in America
PT Fuel Systems Forever

Jim
wrenchguy
 Posted Thursday, September 26, 2019 1:21 AM
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jimfols (9/25/2019)
I cannot offer any help but thanks for posting the video.


thanks, no ads on my channel. https://www.youtube.com/user/d4mike01/videos
FredD
 Posted Thursday, September 26, 2019 8:52 AM
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Find an owner's manual for it.


Fred

Ahhh, there's nothing like the smell of diesel fumes in the morning.

1989 Mack MH 612
wrenchguy
 Posted Tuesday, October 01, 2019 1:18 AM
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Finally got 1! The army manual i got with the machine had nothing about shutting down, emergency valve, nor decompressoring it for shut down.



I'm gonna use shutoff valve to bring rpm to 400/500 rpm, then decompress it to stop. Doing it this way i'm not running the fuel pump disc dry.

jimfols
 Posted Tuesday, October 01, 2019 5:57 PM
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Here's a manual for disc fuel pumps.


https://drive.google.com/file/d/0B6YXH_GjByQ-RXpQMkQ1cFhad00/view

On page 5-56 Fig 5-170


The screw on the top of the governor with the wing nut is the low limit adjusting screw.
I don' know anything about it, just trying to help.

Over 60 Years of Service Dedicated to Trucking in America
PT Fuel Systems Forever

Jim

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