190XT engine problem

Hey guys, my brother picked up his second Series III 190 XT last summer. Bought it cheap because of a broken camshaft but it had an overhaul not too many years ago and a complete rear end rebuild with few hours on since. I know the farmer he bought it from and it's had a fairly good home since he's had it.

Any how, this farmer had it hauled into a former Deere dealer/now independent shop because the tractor stopped when he was using it. The shop found a broken camshaft but could not see any reason and not knowing a thing about Allis figured it was an Allis trait. They put another cam in and the farmer drove it the 3 miles home........ well not quite. The engine suddenly stopped again on the highway so he called the repair shop and they hauled it back and found the cam was broken again, same spot, at the end near the gear. They have looked over the gears again and they look good according to them.

So now they are thinking the damper pulley may be bad. They once had a similar problem on a Deere tractor that broke two cams and they narrowed it down to the brand new crank damper pulley from Deere. Even though the timed marks were right on the pulley was out of balance and cause the cam to break. After another damper pulley was installed the problem was solved.

 Now on this 190, the timed marks are only off .006" and to me that it nothing but could the pulley be out of balance anyhow and could that cause the broken cam? Like I said, they say there is nothing wrong with the timing gears as far as they could tell.

This is how my brother this tractor. The farmer is in his 80's and just doesn't want to deal with it any more and being it had been at this particular shop before, my brother took it back to them to fix but the shop is asking my brother what he wants to do. Replace gears any how and the pulley? Sounds to me they are kind of at a loss.

Think I'd be looking for a mechanic that knows something about AC tractors.

This happened to me years ago on my 200. Was running 20' batwing mower at high throttle and all at once it was "lights out". Broke camshaft clean just behind the gear and also bent some push rods. The culprit was somewhat hydraulic related. The hydraulic pump mounts to a housing maybe 3-4"? thick. If memory serves me right there was a nut in the housing that had worked loose and let the actual gear inside the timing gear cover start to "wobble" slightly and after it got loose enough everything just kinda jammed and locked up. Something had to give so the camshaft broke. I fixed it myself and it was quite of a big undertaking. Just a lot to take apart and re-assemble.

My buddy bought a 190!!---YUP!!! broken cam!! LOL!!!-- that is why he got it cheap! thanks; ac fleet

Just for my personal benefit. Isnt the hyd pump driven from the other side. Trying to remember? So if the pump is freezing up but the cam is still forces to spin its breaking the weakest point. Trying to remember how the timing gear set is arranged

Hyd pump does run right off of the cam gear. Same setup as a D21/210/220 also.

There are/was/is a camshaft to drive your old bayonet style oil pump and still utilize the updated 4 inch long bolt in the camshaft nose. There is also a narrow HARD crankshaft gear !!! No need to make one from a wider one.

Yep, thanks Doc, got that but the narrow 74022228 is no longer available or so I'm told by dealer. Going to machine or surface a good used wide gear that came from an M or M2 combine. That's what Ag Land Implement suggested or wait until they locate a good used 74022228 gear.

Yep, that's a yikes! Thanks anyhow. I think we found a machine shop that can narrow the gear we have.

Waiting on that news from mechanic

I have a good used cam with bolt on gear and made for cam driven oil pump if you are still looking. Gear is 4022229.

Lynn Marshall wrote: I have a good used cam with bolt on gear and made for cam driven oil pump if you are still looking. Gear is 4022229.

Thanks but too late, he's already got a new cam.

I don't think I gave an updat to this tractor but they did find metal parts, possibly bearing pieces, in the pump. Put a new pump on, checked the suction tube for more metal, made sure the screen was installed and it was with no holes. The previous owner is in his 90's and said the tractor had "rear end" work done to it some years back. We are thinking the rear end work might have actually been torque tube problems as mentioned by tbran. Any how it has been together and working fine for months now.