HD3 major engine rebuild

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

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

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
donw Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 27 Dec 2009 Location: Washington Points: 43	Post Options Post Reply Quote donw Report Post Thanks(0) Quote Reply 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

Sponsored Links

Kipn Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Tewksbury, Ma Points: 800	Post Options Post Reply Quote Kipn Report Post Thanks(0) Quote Reply 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

donw Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 27 Dec 2009 Location: Washington Points: 43	Post Options Post Reply Quote donw Report Post Thanks(0) Quote Reply 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

kip in cny Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 29 Nov 2009 Location: Jordan NY Points: 538	Post Options Post Reply Quote kip in cny Report Post Thanks(0) Quote Reply 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

steve aust Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 13 Sep 2009 Location: australia Points: 37	Post Options Post Reply Quote steve aust Report Post Thanks(0) Quote Reply 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