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55allis 
Orange Level
Joined: 30 Jun 2020
Location: Griswold Iowa
Points: 1315
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 Topic: 8550 questions
Posted: 19 hours 2 minutes ago at 9:43pm |
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Good day,
So looking at a 8550 that’s about an hour away that has been sitting for about 6-7 years due to blowing an injection line.
Seller says his son finished 10-15 acres of NH3 before replacing the line but says it still didn’t run right so he parked it in the weeds planning on repairing it but never got to it.
Seller’s pretty sure it has a hole in the piston?
If that’s the case would it be reasonable to only replace that piston and ring set?
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1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3, several Allis garden tractors 
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DrAllis
Orange Level Access
Joined: 12 Sep 2009
Points: 22733
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Posted: 18 hours 16 minutes ago at 10:29pm |
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Interesting how we go from a leaking injection line (which would leak fuel and could cause a miss-fire) to a hole in a piston ?? Two unrelated problems. It could have been a leaking number one injector line and a failed piston could be number 2 or 3 or 4 or 5 or 6 piston ?? Should have been a ton of blow-by with a failed piston. There are injector lines under the valve covers too.........
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Mike Kroupa
Silver Level
Joined: 02 Oct 2009
Location: pierce, ne
Points: 339
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Posted: 17 hours 49 minutes ago at 10:56pm |
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I owned and farmed with a 8550 for many years and yes they are notorious for injection line failures. One other possibility is when they replaced the failed line the inj. pump barrel might have moved slightly, causing fuel to bypass and the engine still miss. This happened to me once, removed the one head expecting to find something and everything looked good. Good Luck!
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55allis
Orange Level
Joined: 30 Jun 2020
Location: Griswold Iowa
Points: 1315
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Posted: 17 hours 44 minutes ago at 11:01pm |
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I thought that very interesting too..
Going to look at it possibly Saturday morning if all works out.
Seller drained the engine oil last spring or so to start in on the repair so I wont be able spin it over.
Is there any concerns about being a dry start?
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1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3, several Allis garden tractors
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DrAllis
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Joined: 12 Sep 2009
Points: 22733
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Posted: 17 hours 42 minutes ago at 11:03pm |
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Fill the new engine oil filters with oil before installing and start it at an idle to let the oil pressure build.
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55allis
Orange Level
Joined: 30 Jun 2020
Location: Griswold Iowa
Points: 1315
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Posted: 17 hours 32 minutes ago at 11:13pm |
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Is there a way to have a custom lines made that has thicker sides walls or bigger line with same fittings?
Never even seen one in person, only photos and videos off the internet so bear with me.
With this being told what’s a good price range to offer?
Paint is crappy (mostly brown) tires aren’t the greatest but do look like they hold air and might last awhile. Cab interior is crap, seat has a hole. Hour meter reads 3644 hours but not sure if it works.
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1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3, several Allis garden tractors
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55allis
Orange Level
Joined: 30 Jun 2020
Location: Griswold Iowa
Points: 1315
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Posted: 17 hours 28 minutes ago at 11:17pm |
 DrAllis wrote:
Fill the new engine oil filters with oil before installing and start it at an idle to let the oil pressure build. |
Ok, didn’t know what it would do to a sitting engine. Thanks!!!
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1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3, several Allis garden tractors
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55allis
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Joined: 30 Jun 2020
Location: Griswold Iowa
Points: 1315
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Posted: 4 hours 39 minutes ago at 12:06pm |
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Talked to the owner again today and he said it had a lot of blow by to the point of blowing oil out the breather..
Said it didn’t have any before…
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1955 AC WD45 diesel with D262 repower, 1949 AC WD, 1963 A-C D17 series 3, several Allis garden tractors
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Unit3
Orange Level
Joined: 17 Oct 2009
Location: NC Iowa
Points: 5657
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Posted: 2 hours 46 minutes ago at 1:59pm |
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The more I read, I think this engine needs a major overhaul. If one of the diesel lines under the valve cover let loose, you could’ve had Diesel get to the bearings. You could’ve had a valve touch a piston. It sounds like the owner has told you several different things, so it could be anything and everything.
We had diesel in the oil on a 4W305. It turned out that had a bad seal on the injection pump. Every time I turned into the wind, I could smell Diesel. I managed to catch it in time and no damage was done. Sometimes it’s really good to be lucky.🍀🍀🍀🍀🍀
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2-8070FWA PS/8050PS/7080/7045PS/200/D15-II/2-WD45/WD/3-WC/UC/C
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
Points: 8943
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Posted: 2 hours 4 minutes ago at 2:41pm |
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Pursuing one of those sounds as bad as wanting a 45D
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