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HD3 major engine rebuild

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donw View Drop Down
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Joined: 27 Dec 2009
Location: Washington
Points: 43
Post Options Post Options   Thanks (0) Thanks(0)   Quote donw Quote  Post ReplyReply Direct Link To This Post Topic: HD3 major engine rebuild
    Posted: 04 May 2010 at 11:04pm
The old girl needs a rebuild. I tore it down and found the head was cracked in several places but it can be pinned. The engine also began knocking fairly loud and I suspected a spun bearing or something worse.

I have most all the parts I need for the rebuild except a gasket set. I bought a crank, cam, pistons, sleeves, bearings, etc. I also picked up a fresh rebuilt head for a fair price. I'll post pictures as I complete it.

Once I'm done with the engine, the only thing left will be the pins and bushings. It's been an enjoyable project. These machines are really easy to work on; heavy but easy.

The first couple photos are of the old rod bearings. The best looking bearing was from #1 cylinder. The spun bearing was on #4.








Edited by donw - 04 May 2010 at 11:06pm
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Kipn View Drop Down
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Joined: 12 Sep 2009
Location: Tewksbury, Ma
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Kipn Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2010 at 2:01pm

I got $200 in the head. $200 in the crank and $400 in parts for the motor. Another $600 into steering clutches, brake bands, gaskets, gauges, seals, bolts and paint. Waiting for the welder to show up for a few minor spots. Then I can finish putting it back together and see how I did. Gee, it's only been 3 years now.

1961 H3
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donw View Drop Down
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Joined: 27 Dec 2009
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Post Options Post Options   Thanks (0) Thanks(0)   Quote donw Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2010 at 6:11pm
I haven't been able to use mine for almost 2 months now and am way behind on my landscaping chores. I can imagine how excited you must be after waiting 3 years!
Don
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kip in cny View Drop Down
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Joined: 29 Nov 2009
Location: Jordan NY
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Post Options Post Options   Thanks (0) Thanks(0)   Quote kip in cny Quote  Post ReplyReply Direct Link To This Post Posted: 05 May 2010 at 7:46pm

That will be next years project for my HD3   Iam still looking for a good roller if you find someone parting one out. 

160 CA 920diesel 5020 HD-3
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steve aust View Drop Down
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Location: australia
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Post Options Post Options   Thanks (0) Thanks(0)   Quote steve aust Quote  Post ReplyReply Direct Link To This Post Posted: 06 May 2010 at 4:38am
Buda / Allis engines need to be warmed up at 1/4  - 1/2 throttle before working hard and also let them idle/cool down for a few minutes before shutting them down shouldnt have any problems with heads cracking and are pretty reliable engines . steve
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