Allis 7080 overhaul opinions
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=112951
Printed Date: 31 Aug 2025 at 6:49pm
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Topic: Allis 7080 overhaul opinions
Posted By: AllesFarm
Subject: Allis 7080 overhaul opinions
Date Posted: 06 Oct 2015 at 11:43am
| So my 7080 developed a knock and turns out a rod bearing went out and it spun it. ~4500 hours and a black belly. Just got back an estimate from the shop and looking at just under $8,000 for the overhaul and wondering if it is worth it... bought the tractor less than 100 hours ago for $15,000 and it was a great tractor (while it worked). Opinions on going through with overhaul or looking into a cummins retrofit or ? |
Replies:
Posted By: DrAllis
Date Posted: 06 Oct 2015 at 12:28pm
| New crank for sure and a new viscous crank pulley dampener. Get a different conn rod and check the balance of it to the other five. All new conn rod bolts. Magnaflux conn rods. New pin bushings. Magnaflux the oil pump mounting bracket ears. Set the high idle down to 2600-2650 RPM max. |
Posted By: DougG
Date Posted: 06 Oct 2015 at 3:18pm
| Dam hate to hear that happened with only putting a 100 hours on it as the New owner |
Posted By: Dmpaul89
Date Posted: 06 Oct 2015 at 3:55pm
| That's a tough call. I think I would go for a used engine. Look on ebay there are a few I think, I saw a NOS long block a couple weeks ago. |
Posted By: DSeries4
Date Posted: 06 Oct 2015 at 6:00pm
I definitely would not go for a "good" used engine. You are taking a complete stranger's word that it is good. That engine might last 100 hours, just like the original one did. Get it rebuilt, then you know what you have. Where else are you going to get a 180 hp tractor for $23,000? ------------- '49 G, '54 WD45, '55 CA, '56 WD45D, '57 WD45, '58 D14, '59 D14, '60 D14, '63 D15D, '66 D15II, '66 D21II, '67 D17IV, '67 D17IVD, '67 190XTD, '73 620, '76 185, '77 175, '84 8030, '85 6080 |
Dmpaul89 wrote:Posted By: Dmpaul89
Date Posted: 06 Oct 2015 at 8:04pm
|
Where else are you going to get a 180 hp tractor for $23,000? Just about anywhere! And where does it end? Whos to say the rear end doesnt go out after the engine rebuild. Then what. Have 30k in it? |
Posted By: Daehler
Date Posted: 06 Oct 2015 at 8:11pm
|
Get her rebuilt and lower the rpms some. Had about the same thing happen on a 8070, put just over a 100 or so hours and blew a piston. 7080's sound so mean they make a Deere wet themselves ------------- 8070FWA,7080 BlackBelly, 7045,2 200s,D19,D17,G, WD,45,UC,7 AC mowers and lots more! "IT TAKES 3 JD's TO OUT DO AN ALLIS, 2 TO MATCH IT IN THE FIELD AND 1 FOR PARTS!" |
Posted By: victoryallis
Date Posted: 06 Oct 2015 at 8:49pm
|
I have a Cummins powered 7580 the Cummins is the cherry on the top. I don't know who did the repower but they did a good job. It looks factory. You can find a 505 for $2500 not sure about an adaptor plate. ------------- 8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760 |
Posted By: Dmpaul89
Date Posted: 06 Oct 2015 at 9:02pm
| Guy sells the plates on ebay I think the kit is about 1200 |
Posted By: Jwmac7060
Date Posted: 06 Oct 2015 at 9:06pm
| Do not mess with the overhaul...drop a Cummins in it and make a real tractor out of it....we did it with an 8070 and it made it one hell of a tractor. I wouldn't own a 7080, 7580 or an 8070 without a Cummins motor in it. I'm die hard Allis but the 426 was not beefy enough for those tractor's |
Posted By: Dkienzle
Date Posted: 06 Oct 2015 at 9:57pm
| If your gonna keep it and use it for a long time I'm in the Cummins conversion camp. We have a Cummins powered 7080 and it is a horse. Very good combination. |
Posted By: AllesFarm
Date Posted: 07 Oct 2015 at 9:26am
| Thanks for all the advice, everyone. Appreciate it. I'll look in to the cummins conversion, that would be with a 8.3L correct? And if I went through with the conversion how difficult is it- do you basically just need to drop it in and plumb it or is it super complicated? |
Posted By: Lonn
Date Posted: 07 Oct 2015 at 9:32am
|
It'll cost money to convert. I'd just do what Dr Allis said. Someone said you can get all kinds of 180 hp for $23,000 but you'll have to eat at least $10,000 on your 7080 to get rid of it. With a knock to me it isn't worth one penny more than $5,000. In fact $3,000 would be all I'd pay if you want to sell it to me and deliver it. Economically the overhaul is your best option IMO. ------------- -- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot |
Posted By: AllesFarm
Date Posted: 07 Oct 2015 at 9:43am
Also, here's a picture of the old gal on the baler. |
Posted By: Lonn
Date Posted: 07 Oct 2015 at 10:43am
|
Too good to throw away ------------- -- --- .... .- -- -- .- -.. / .-- .- ... / .- / -- ..- .-. -.. . .-. .. -. --. / -.-. .... .. .-.. -.. / .-. .- .--. .. ... - Wink I am a Russian Bot |
Posted By: TREVMAN
Date Posted: 07 Oct 2015 at 10:44am
| Picture is worth a thousand words...Look, there is a reason you paid 15k, its a pretty nice tractor for what, 35 years old? If it were me, I'm 49, Id rebuild it and tune the high idle down as recommended. Should last a long time, jmho, Trev. |
Posted By: SHAMELESS
Date Posted: 07 Oct 2015 at 11:51am
| I've got a good engine on my 7080, but the pump went out, and I parked it. (there's other reasons why I parked it, not just the pump) been sittin now for 2 years (exhaust covered). if you come here, and take it out, and puts it in yers. I want $2500. for the engine, if it don't run, you don't own it...bring it back for a refund! |
Posted By: Tbone95
Date Posted: 07 Oct 2015 at 12:50pm
Now that there is hard to beat! |
Posted By: Dmpaul89
Date Posted: 07 Oct 2015 at 1:16pm
| That would be the route I would take. Buy shameless motor and use the tractor till youve got your moneys worth. I have a tight farm budget I wouldnt be able to spread your cost of rebuild over my acres comfortably. Your operation may be different so do what you can afford I guess. |
Posted By: AllesFarm
Date Posted: 07 Oct 2015 at 1:17pm
|
Hmm that may be a good option, I'll send you a PM shameless |
Posted By: Orange Blood
Date Posted: 07 Oct 2015 at 3:39pm
What do you want for the whole works? ------------- Still in use: HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060 Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7 |
Posted By: JPG AUSTRALIA
Date Posted: 07 Oct 2015 at 6:13pm
that's a good deal from shameless,and while your there getting the motor you could get a picture of him 
|
Posted By: michaelwis
Date Posted: 07 Oct 2015 at 6:26pm
id say that's an awesome deal 7040 engine went bad and found a 70 80 engine for 2500 it was a win win ------------- WD WD45 DIESEL D 14 D-15 SERIES 2 190XT TERRA TIGER ac allcrop 60 GLEANER F 6060 7040.and attachments for all Proud to be an active farmer |
Posted By: SHAMELESS
Date Posted: 07 Oct 2015 at 7:19pm
| Orange Blood....I've already offered the engine, wouldn't be fair to sell it all now out from under him....now would it? if he decides not to take the offer then we'll talk! I wanna be fair! |
Posted By: SHAMELESS
Date Posted: 07 Oct 2015 at 7:20pm
| JPG....the offer still stands....ever seen a camera smashed all over a driveway? lol |
Posted By: SHAMELESS
Date Posted: 07 Oct 2015 at 7:21pm
| plus he'll be doing all the work, I can assist with lifting it off the tractor and onto his ride! |
Posted By: Orange Blood
Date Posted: 08 Oct 2015 at 6:03am
Sorry Dale, I wasn't suggesting you actually sell it out from under him, I was just curious, given the chance he might not take it. If you have a deal with him, by all means I don't want to get in the way, that's not how I operate. ------------- Still in use: HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060 Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7 |
Posted By: injpumpEd
Date Posted: 08 Oct 2015 at 7:11am
Now I'm confused! Isn't the profile pic you? lol! ------------- 210 "too hot to farm" puller, part of the "insane pumpkin posse". Owner of Guenther Heritage Diesel, specializing in fuel injection systems on heritage era tractors. stock rebuilds to all out pullers! |
Posted By: SHAMELESS
Date Posted: 08 Oct 2015 at 7:31am
| my hair is a little longer Ed! |
Posted By: dpower
Date Posted: 08 Oct 2015 at 7:55am
| and curly |
Posted By: Orange Blood
Date Posted: 08 Oct 2015 at 8:45am
Well if my luck holds out, I may sneak into his yard, and pick up those camera pieces in the next week or two, and I'll let you all know. Anyone know how to make a big steak last longer to distract a dog?  ------------- Still in use: HD7 WC C CA WD 2-WD45 WD45LP WD45D D14 3-D17 D17LP 2-D19D D19LP 190XTD 190XTLP 720 D21 220 7020 7030 7040 7045 3-7060 Projects: 3-U UC 2-G 2-B 2-C CA 7-WC RC WDLP WF D14 D21 210 7045 N7 |
Posted By: SteveM C/IL
Date Posted: 08 Oct 2015 at 9:04am
| Too late now but you should have replaced brgs when you bought it with that many hrs especially in a high rpm 7080. |