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55allis 
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Joined: 30 Jun 2020
Location: Griswold Iowa
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 Topic: Restored d17 project
Posted: 17 Aug 2025 at 7:45am |
Blessed Sunday morning Just got this d17 in that does not turn over at all and I’m guessing that it’s the crank seals are the culprit due to that being the last thing that was done to it. It has been fully redone inside out supposedly. I thought that I’d post on here from the start to finish so that it’s on the record. Btw the rear crank seal is still leaking….. 
Edited by 55allis - Yesterday at 5:55pm
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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DrAllis
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Joined: 12 Sep 2009
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Posted: 17 Aug 2025 at 7:57am |
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That's a bad deal. I figured he'd have someone else (competent) fix it right and keep it after all the $$$$$ spent on it.
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55allis
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Location: Griswold Iowa
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Posted: Yesterday at 6:01pm |
Update: found that all 8 push rods are bent and I call shot… The rear crank seal leak ended up being the gasket had fell into the oil pan.    Anything else I should check? I’m going to re-torque everything just to be safe. What are the common problems that cause pushrod bending? Don’t want it to do it again…
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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plummerscarin
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Joined: 22 Jun 2015
Location: ia
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Posted: Yesterday at 6:23pm |
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In my case, the valves hung up in the head. Bent pushrods, bent valves, and left a mark in the piston where they made contact. Might even consider having the rods inspected as well.
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55allis
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Location: Griswold Iowa
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Posted: Yesterday at 6:32pm |
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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steve(ill)
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Joined: 11 Sep 2009
Location: illinois
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Posted: Yesterday at 6:50pm |
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hard to believe that EVERY VALVE was stuck.. but possible... I would check the CAM TIMING... that would effect ALL valves hitting the pistons.... checking the rods for any BEND would be a good idea.
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Like them all, but love the "B"s.
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Les Kerf
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Location: Idaho
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Posted: 22 hours 56 minutes ago at 8:29pm |
 steve(ill) wrote:
hard to believe that EVERY VALVE was stuck.. but possible... I would check the CAM TIMING... that would effect ALL valves hitting the pistons.... checking the rods for any BEND would be a good idea. |
X2 The previous thread linked above gave no indication as to whether or not this engine ever ran at all and no clues as to what type of 'overhaul' was done. Wrong pistons? Increased stroke? Shaved head? High-lift cam? Timing gears thrown in there haphazardly?  I dunno, I wonder who does?
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55allis
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Posted: 22 hours 28 minutes ago at 8:57pm |
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Funny thing is I don’t see any damage to the pistons or valves…
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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Bingo8
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Joined: 04 May 2017
Location: Iowa
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Posted: 22 hours 23 minutes ago at 9:02pm |
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Oh, I am keeping it. 55Allis is helping me out. It was an unfortunate situation. Unfortunately, I am not sure what I could have done differently when choosing him to restore it. He came highly recommended, has his work in magazines, and put clinics on for tractor restoration. Seemed like the right guy at the time. Hindsight is 20/20 but I am moving on with someone who hopefully can get it fixed up.
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55allis
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Posted: 22 hours 2 minutes ago at 9:23pm |
Found these numbers on on piston; AE 233  Maybe a brand and part number?
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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SteveM C/IL
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Joined: 12 Sep 2009
Location: Shelbyville IL
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Posted: 20 hours 22 minutes ago at 11:03pm |
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Bout have to be cam out of time unless they're all stuck
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55allis
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Posted: 19 hours 45 minutes ago at 11:40pm |
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I’ll remove the timing gears cover and check it out.
Think I’m still going to have to split the tractor due to a hydraulic leak in the clutch housing.
Thanks!!
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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DrAllis
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Posted: 12 hours 44 minutes ago at 6:41am |
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There's something going on with that engine. It was a running engine !! That's why the rear seal was leaking...it RAN !! All 8 push rods bent on a running engine?? Makes you think the camshaft quit turning.
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Les Kerf
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Posted: 11 hours 10 minutes ago at 8:15am |
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Could the governor fail and send debris into the timing gears and cause the cam to lock up?
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DrAllis
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Posted: 10 hours 43 minutes ago at 8:42am |
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Worn governor weights and timing gear damage are two things that go together. Maybe, just maybe, the governor weights blew apart while the engine was running AND no one was sitting on the seat to shut off the key ?? That might xplain the carnage. And as far as the man who restored this tractor goes, he might very well be the great restorer of SOME BRANDS of tractors, but certainly not a D-17 Allis-Chalmers. I can't imagine tackling multiple brands for restore projects and ever hope to be very successful at it. The nuances and quirks of each particular brand and model keeps most of us busy when repairing/rebuilding things.
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Les Kerf
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Posted: 10 hours 4 minutes ago at 9:21am |
DrAllis wrote:
... Maybe, just maybe, the governor weights blew apart while the engine was running AND no one was sitting on the seat to shut off the key ?? .... |
...AND maybe the guy WAS sitting in the seat and reached around with a broomstick and shoved the throttle wide open on the carburetor...  
I spent 30 years in sawmill maintenance, and the single most difficult part about troubleshooting equipment problems was getting accurate, and COMPLETE information about what actually happened. What did you see? What did you hear? What was the machine doing immediately prior to the wreck? What was changed/adjusted? Etc.
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55allis
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Posted: 5 hours 40 minutes ago at 1:45pm |
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So now I’m even wondering if he ever had it running…
Spark plugs are new and never ran on (he claims put new ones after he ran it)
Pistons still have grease on top.
Crank pulley doesn’t have any paint/rust wore off from the belt.
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1955 AC WD45 diesel with D262 repower, 1949 AC WD45
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HudCo
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Location: Plymouth Utah
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Posted: 4 hours 42 minutes ago at 2:43pm |
Les Kerf wrote:
DrAllis wrote:
... Maybe, just maybe, the governor weights blew apart while the engine was running AND no one was sitting on the seat to shut off the key ?? .... |
...AND maybe the guy WAS sitting in the seat and reached around with a broomstick and shoved the throttle wide open on the carburetor...
I spent 30 years in sawmill maintenance, and the single most difficult part about troubleshooting equipment problems was getting accurate, and COMPLETE information about what actually happened. What did you see? What did you hear? What was the machine doing immediately prior to the wreck? What was changed/adjusted? Etc.
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les and dr. that is exactly hits the nail on the head getting correct info. and you cannot be an expert on a perticualer brand verey easy when you work on multipe brands of stuff
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DrAllis
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Posted: 30 minutes ago at 6:55pm |
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Here's another good example of poor information. One of our younger field tech's was out working on an old Catyoung 988 wheel loader. The unit had around 50,000 total hrs on it. The complaint was a "may-day" sudden loss of engine power. Just started doing it too. Can't even use it, it's sooo bad. The Tech called me for some elderly advice. He said the engine starts and runs fine, but maximum turbo boost was 3 to 4 lbs low of factory specs. I told him that I think the injection pump is probably getting tired, and the complaint of it "just started doing this" isn't true. I suggested that he give the fuel delivery screw a turn or turn and a half outward and see if the boost improves. I also told him to grill all affected employees at this quarry about the machines power as of late. In the end, the boost went up. Engine HP was now where it should have been. The "lie" was that the performance has been somewhat weak for a year or more. This particular day the operator was "new" to this machine.
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