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831 saved from the scrapper

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Brian Knuckles

02-07-2018 18:38:49




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Found this 831 growing up in weeds. I'd like to think we've saved it from the scrapper! She's a bit rusty but metal is straight, motor is free, has no water in the oil and if the tach is right has low hours. She's been sitting for years but said to have "ran when parked". Haven't tired to start it yet, wanted to ask you guys what to check especially in the pump. I've seen several past post about pulling the cover to confirm the rack is free. Could someone share a bit more on the subject? I'm no expert but pretty familiar with diesels, having replaced a pump or two just not this type. Thanks in advance.

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c.amick

02-08-2018 17:00:48




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 Re: 831 saved from the scrapper in reply to Brian Knuckles, 02-07-2018 18:38:49  
I like it. I always try to make sure the valves are free before I try turning the engine over to avoid bending push rods.



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Don Rudolph

02-08-2018 08:46:30




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 Re: 831 saved from the scrapper in reply to Brian Knuckles, 02-07-2018 18:38:49  
It looks to be very straight and complete. Good for you for saving it. Keep us posted on your progress with it. Don



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Ande

02-08-2018 05:15:18




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 Re: 831 saved from the scrapper in reply to Brian Knuckles, 02-07-2018 18:38:49  
Very good you saved the "831", hope things work out so you can put it back into service. Keep us posted

Thanks for sharing.

Dan



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Dieseltech

02-07-2018 20:15:20




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 Re: 831 saved from the scrapper in reply to Brian Knuckles, 02-07-2018 18:38:49  
Very nice save! On the injection pump, start by removing the round cap at the front, just above the timing case. The cap has two flats for a 19MM open wrench. Remove the cap, have a helper move the throttle lever full travel, wide open to shutdown position. If the rack is free it will move in and out with the throttle. The screw and shims at the rack front are used to adjust starting fuel CC delivery. You should be able to push the rack in freely by hand too. If it's stuck DO NOT beat on it, pump will need to come off to free the stuck plungers, which cause the rack to stick. Only takes one to stick and cause trouble. If the rack sticks forward DO NOT attempt to start the engine either, if five plungers are free and just one stuck the engine WILL try to run away on the five working plungers. Had that happen awhile back on a JD 4430, luckily got it shut down blocking the air system. Then had fun getting the two stuck plungers freed up..

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Brian Knuckles

02-09-2018 19:01:37




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 Re: 831 saved from the scrapper in reply to Dieseltech, 02-07-2018 20:15:20  
Thanks Dieseltech! And many thanks to Jon f mn for giving me some pointers early on when I first found it.



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SDLars

02-08-2018 17:51:52




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 Re: 831 saved from the scrapper in reply to Dieseltech, 02-07-2018 20:15:20  
I've been going to ask this same question except on the 500 rotary. Similar procedure?



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Dieseltech

02-09-2018 09:27:55




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 Re: 831 saved from the scrapper in reply to SDLars, 02-08-2018 17:51:52  
Nope, totally different pump. If you like call my cell some evening, five seven four eight three five 3292. Am on Eastern time in Indiana.



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tomturkey

02-07-2018 19:39:08




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 Re: 831 saved from the scrapper in reply to Brian Knuckles, 02-07-2018 18:38:49  
Wishing you the best on your purchase. Sounds like you've done your homework. Move slowly and patiently. Lots of things could be stuck. gobble



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scottwv

02-07-2018 18:56:10




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 Re: 831 saved from the scrapper in reply to Brian Knuckles, 02-07-2018 18:38:49  
Nice save!!



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