HD5/HD6/HD-344 Power Unit Radiator Interchage

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   Guys:  Work is progressing to bring the venerable HD6 G Shovel back to life.  One defect I noticed was the radiator on my HD6G is in dire need of replacement.  
Am looking through parts books and see the following listed for the Radiator Assembly:

HD5 G - Part Number 050516
HD6 G - Part Number 092023 also a hand written parts number appears to supercede that shows 70649436 (includes armored tubes at rear of core). 
D-344 Industrial Engines and Power Units - Part Number 4348919

Do any of you guys know if there is any interchangeability between the above? 

If not I will need to tap your knowledge to obtain a good vendor(s) that can provided a good core for my original radiator.

I welcome and appreciate any and all comments.  Thank-you...Orangeman

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orangeman Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Points: 1686	Post Options Post Reply Quote orangeman Report Post Thanks(0) Quote Reply Topic: HD5/HD6/HD-344 Power Unit Radiator Interchage Posted: 30 Sep 2012 at 9:48am
	Guys: Work is progressing to bring the venerable HD6 G Shovel back to life. One defect I noticed was the radiator on my HD6G is in dire need of replacement. Am looking through parts books and see the following listed for the Radiator Assembly: HD5 G - Part Number 050516 HD6 G - Part Number 092023 also a hand written parts number appears to supercede that shows 70649436 (includes armored tubes at rear of core). D-344 Industrial Engines and Power Units - Part Number 4348919 Do any of you guys know if there is any interchangeability between the above? If not I will need to tap your knowledge to obtain a good vendor(s) that can provided a good core for my original radiator. I welcome and appreciate any and all comments. Thank-you...Orangeman

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dadsdozerhd5b Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 27 Sep 2009 Location: lansdale pa. Points: 527	Post Options Post Reply Quote dadsdozerhd5b Report Post Thanks(0) Quote Reply Posted: 30 Sep 2012 at 7:27pm
	i would think the hd6 rad would be bigger as it has a bigger engine and more heat. i think they were the same housing but not sure. sit down when you get the price of a core. last i heard they were in the 1200 dollar range but i thought that was high. i have no good source, sorry. good luck
	HD5B, HD5G, (2) FARMALL A's, CUB. DO IT RIGHT THE FIRST TIME, IGNORE THE LAUGHTER. FLANNEL IS ALWAYS IN STYLE.

Coke-in-MN Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Afton MN Points: 41217	Post Options Post Reply Quote Coke-in-MN Report Post Thanks(0) Quote Reply Posted: 30 Sep 2012 at 7:57pm
	HD5 is open system and not a pressure unit , unsure of the others . You might check some sizes and see what else might fit as far as truck unit. I believe the HD6 was wider in front mount and radiator was larger than the 5 could accommodate.
	Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful."

Jay Tyrrell Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 28 Jul 2011 Location: Staples Points: 65	Post Options Post Reply Quote Jay Tyrrell Report Post Thanks(0) Quote Reply Posted: 30 Sep 2012 at 8:12pm
	I'm no rocket sciencetist but my HD6G didn't have radiator in it when i got it. Took a radiator from a forklift at work (JLG G9-43A) and made it fit. Had to move lower port on the radiator, that was pretty much it. Could have moved the radiator fill cap to center but the Gas/Ax was cheaper, and I cut a hole in the hood off to the side for access. Radiator was off a 100HP engine so it has plenty a capacity. Works great. My Point: Any heavy duty radiator will work as long as the fisical size fits. Moving ports and making suport bracets is alot cheaper then $1,200 core Edited by Jay Tyrrell - 02 Oct 2012 at 6:48am

ac_sd Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 23 Apr 2011 Points: 194	Post Options Post Reply Quote ac_sd Report Post Thanks(0) Quote Reply Posted: 02 Oct 2012 at 12:32am
	HD-5 and HD-6 radiators are completely different... Not sure about the 344 Power unit radiator.

orangeman Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Points: 1686	Post Options Post Reply Quote orangeman Report Post Thanks(0) Quote Reply Posted: 02 Oct 2012 at 6:59pm
	Anyone on here seen or heard of a Buda or AC HD-344 in application. The must have been put in something but what I am not sure. Maybe barges or tugs? I have only seen one picture of a HD-344 and it was coupled to a generator. I know the military used the 7000 engine but that engine is a bit different than the early HD-344 block. Any thoughts or comments on applications would be of great help! Thank-you..Orangeman

Ages Cat Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 12 Sep 2009 Location: Hutchinson, MN Points: 681	Post Options Post Reply Quote Ages Cat Report Post Thanks(0) Quote Reply Posted: 02 Oct 2012 at 7:48pm
	The 344 was used in the HD-6, prior to serial number 13322. After that it became the 6000 with pencil type injectors which started better and ran much cleaner. The T-16 four wheel drive tractor also used the 344, along with the 145 and M70 motor grader and the TL-14 and TL-16 wheel loaders. i have 2 HD-6's one with a 6000 and one with a 344 converted to a 6000. They are good little engines that start great and don't use a lot of fuel.