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twinsonfarm 
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Joined: 05 Aug 2019
Location: IL
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 Topic: Allis 7060 670i rebuild help- piston
Posted: 05 Nov 2019 at 2:05pm |
I have a black belly Allis 7060 with a 670i engine. I pulled a damaged piston (from shattered exhaust valve) and found the number AP 307 cast into the inside. Does anyone know the manufacture of this piston. The tractor engine was rebuilt before my father purchased this by a John Deere mechanic so who knows what parts were used? The piston ring location does not match the position of the after market pistons that I have seen? Or the location of a piston from 7080 670Hi engine. I need to get a replacement piston that needs to be the same one as this damaged one. Any thoughts?
Edited by twinsonfarm - 05 Nov 2019 at 2:18pm
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Alvin M
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Joined: 24 Jun 2018
Location: PA
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Posted: 05 Nov 2019 at 3:16pm |
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I Will Check Tomorrow For Used One That Was An M & W Piston I Had A Complete Kit Sold It The Other Year I Sold A Lot Of M&W Kits They Will Be Made Again Not Sure When
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Acdiesel
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Joined: 15 Jun 2012
Location: Rochester Ohio
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Posted: 05 Nov 2019 at 8:05pm |
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looks like its should have more rings, i see the oil control ring and maybe to compression rings. never worked on a 670I, maybe that's correct?
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I'm a pharmacist (farm assist) with a PHD (post hole digger)
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DrAllis
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Joined: 12 Sep 2009
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Posted: 05 Nov 2019 at 8:32pm |
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M&W pistons had a wide top ring that looked like a piece of angle iron.
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MACK
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Posted: 05 Nov 2019 at 9:22pm |
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If valves don't have a AC part # on them, I would replace them. Have saw after market valves fail before. MACK
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twinsonfarm
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Location: IL
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Posted: 06 Nov 2019 at 7:36am |
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That makes sense as the broken exhaust valve had no markings....
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Lynn Marshall
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Joined: 13 Sep 2009
Location: Dana, Iowa
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Posted: 06 Nov 2019 at 8:23am |
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That is an M&W power seal piston. They use a high top ring land that is designed like the Dr. said. It improves the compression ratio slightly and makes for better cold weather starting. I'm not sure that they are available any more??
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twinsonfarm
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Posted: 06 Nov 2019 at 9:10am |
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Is it ok to put a reliance piston and sleeve into the No. 2 cylinder and leave the others that are not damaged alone?
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Alvin M
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Posted: 06 Nov 2019 at 10:22am |
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Countryside Tractor Has Used Ones Talk To Eli 717-923-0421
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victoryallis
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Location: Ludington mi
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Posted: 06 Nov 2019 at 11:39am |
 twinsonfarm wrote:
Is it ok to put a reliance piston and sleeve into the No. 2 cylinder and leave the others that are not damaged alone?
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Allis trained mechanic put a Reliance kit in my 8050 it made it 3 hours before it was apart again. While it’s apart buy a complete quality kit and do it right.
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8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760
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200 10and20
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Posted: 06 Nov 2019 at 11:49am |
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Victory is right, why take a knife to a gun fight so to speak. It's a no win situation with only one off brand piston. Good luck either way.
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Pete from IL
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Posted: 06 Nov 2019 at 12:20pm |
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If it was mine I would at least take out the other pistons and inspect them. You have a lot of scoring and scuffing on the piston you have out and I don't think that is all from a dropped valve. You may have other pistons in there with scuffing just like the one you have out.
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SteveM C/IL
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Posted: 06 Nov 2019 at 1:11pm |
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I heard the factory burned and all tooling for those pistons was lost. Got a set in the 220 & 8070....will start below freezing with no aid
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Alvin M
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Posted: 06 Nov 2019 at 2:48pm |
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Riley Tractor Parts Will Have Them At A Later Date They Have The Tolling To Make Them I Just Talked To Them They Will Do The Allis Ones First I Am A Dealer For Riley
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SteveM C/IL
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Posted: 06 Nov 2019 at 8:21pm |
Alvin M wrote:
Riley Tractor Parts Will Have Them At A Later Date They Have The Tolling To Make Them I Just Talked To Them They Will Do The Allis Ones First I Am A Dealer For Riley |
That's good news! They are awesome !
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