7080 Questions

Earlier in the year I acquired a 1975 7080. Runs great, starts quickly, in general a nice tractor. At some point the alternator was replaced with one of the incorrect type and the tachometer wire was left unhooked. The hour meter is stopped at 8,900 hrs. I haven’t used it for much yet but it will be my primary tillage and planting tractor. I always run it below 2,500 RPM.
The pump looks like it has the original safety wires on it, but a note on the valve cover says the valves were done around the 6,000 hr mark.
The guy I bought it from bought it from the original owner who is now in a nursing home with dementia. He didn’t know much history on it as far as any overhauls.

Would it be worth my while to drop the pan and at least roll in new bearings? Or would a full overhaul be better? I’m sure that answer depends on things like how good the compression is, etc. and I haven’t tested that yet. Right now it’s in the shop at the ex-Allis dealer for hydraulic work.
I may be worrying over nothing but really don’t want the 7080/N6 nickname of “Harvey hand grenade” to apply to this 426 if I can fix it before it happens.

I changed the oil in it about 10 operating hours before I took it to the shop. About how many hours should I run it in the field before taking a sample?

I’ll admit I don’t know anything about oil sampling. Do you have a preferred place in mind you like to send them?

our cat dealer has a little kit that comes with each bottle

I have used Blackstone labs for oil sample analysis on my 1999 F250 7.3, 2000 ford Ranger with 3.0 gas and 2012 Kia forte... All samples pulled from the stream at oil pan drain when changing oil. You tell them (vehicle miles) hours, oil type, filter, any additives(lucas oil treatment). They give a report of all the elements in your sample, pretty thorough.

creston have we seen pictures of it yet

Maple-Hunter has the hood decals, as well as a generic 3-1/4" square AC logo, that fits the grill emblem perfect. I've gotten the AC logo decals from DJ's also, DJS1043A. Maybe they have hood decals too?

Sweet machine !Thats what i luv about an enclosed cab , seems windows never opened ,the insides nice !

7080's didn't have a pre-cleaner.

Michael V (NM) wrote: I jus noticed,,NO PRECLEANER!   thats sure different for this part of the world. I even went back to the auction pics jus to make sure I wasn't seeing things. them other pictures sure were GREEN!.. now I know where all the rain went....pretty ugly around here... I still think ya got a decent machine for the money..

You can tell a 7080 from a distance by lack of precleaner, and the larger aspirator muffler. As mentioned, the aspirator essentially "vacuums" dirt out of the air, and blows it out the exhaust. A very basic explanation anyway lol!

What is the casting number on front lower left side of block? It most likely got a replacement short or long block at some point in it's life, many of them did at the higher rpm, and people would neglect them. The 7080  7580 were both equipped with the aspirated air cleaner and muffler. 

Edited by injpumpEd - 04 Dec 2021 at 2:15pm

I am curious Dr. Allis, my 7060 does not have a pre cleaner either. I also thought it was an option on the tractor. You mentioned it was only an option in the 7080 in a previous post.

The rear end is stamped as a 7060. Any idea why a 7060 would come without the pre cleaner? I can't imagine they would swap out a rear end in the tractor. It's a powershift which was not an option on the 7080.

It also has the over sized front tires. Typical of a 7080.

You got me puzzled on the pre cleaner comments.

Thanks

Edited by tthams - 05 Dec 2021 at 4:22pm

I’ve read that over time, the venturi in an aspirator muffler can break or become ineffective, leading to pressurizing the air filter with exhaust gas instead of creating a suction. Is this very likely? I guess the way to test would be just remove the connecting hose when running and check for suction?

Ok, that’s simple enough.