AC 190 (gas) - engine knocking...

Ed S. · Jun 23, 2015

My AC 190 has been a smoker since I bought it at auction a few years ago, and I've deferred doing anything about it other than keeping the oil topped up and changing plugs as they fouled out...

She started knocking pretty loudly while baling first cut, so I parked her while I sort out what to do.

A major looks like it's going to run $3-4,000 (tractor has a FEL with leaky seals, so there's that to be fixed, too).

I'm kind of leaning toward replacing… just thought I'd get some opinions before making the fix/replace decision. Problem is that I really could use a tractor now! No-one local wants to touch it until winter and I don't have the bandwidth to tackle it myself.

If I sold it as-is, am I looking at a bit over scrap? $1,000? Location is in central IL.

es

kabat · Jun 23, 2015

find a smaller, wd45-d17, to get you by for now. Replace the gas with a diesel. You've got a sweet tractor with the loader. Get
the 190 fixed then sell the smaller one for what you paid for it.

cole in mo. · Jun 23, 2015

The knock could be carbon built up on a piston, and hitting the head. Or if everything is worn that much, it could be a rod bearing.

Ed S. · Jun 23, 2015

(quoted from post at 17:09:20 06/23/15) find a smaller, wd45-d17, to get you by for now. Replace the gas with a diesel. You've got a sweet tractor with the loader. Get
the 190 fixed then sell the smaller one for what you paid for it.

I've got a '50 8N that I restored about 7 years ago that runs great, and can run my NH 68 baler (video proof!), so I can manage with that, although it means changing from the rake to the baler instead of having a dedicated tractor to each (#firstworldproblems, I know!). Ever since I got the loader tractor, I can't see how I did without one! But that's not a bad idea, and I've been poking around to see what's available at a reasonable price in my area – not much, unfortunately.

The knock could be carbon built up on a piston, and hitting the head. Or if everything is worn that much, it could be a rod bearing.

Bearings is my suspicion. It has been knocking for a second or three on startup for a while (until oil pressure builds up). The proofmeter stopped working around 3500 hours, and no telling where it's at today (50 years old next year!).

I just came in from the shed, poking around at it, and noticed the hyd dipstick was dry so I added some to the sump and started it up. It knocked for its usual couple seconds and then quieted down. Perhaps what I was hearing was the hyd pump? At any rate, I'll need to take it out and put a load on the engine and see if it comes back – risky, as if it *is* on the verge, I don't want to ventilate the block!

es

AC 190 (gas) - engine knocking...

Ed S.

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kabat

Member

cole in mo.

Well-known Member

Ed S.

Well-known Member

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