[dragon71]

My TR 70 unloads grain much faster than the 86 does. I know the tank is smaller, but the volume of grain coming out is more. The 85 I had wouldn't unload as fast either. The augers and transition are in good shape and the slides are set the same. It seems to me the auger runs faster on the 70.
There are certain things I like better on the TR70 over the later models. It turns shorter and uses less fuel. (Probably because it's about 50 HP smaller.)

It is the first combine I owned so maybe I'm too prejudiced. I've had it now for 14 years. I know the engine's getting weak because it's using more oil and getting harder to start. (Ford diesel) It won't start below 50 degrees without a shot of ether. If anything major happens to it it isn't really worth a lot of fixing. I'd like to find a nice TR75 hydro with a Cat engine. Anyone ever seen a TR76? The manual of my 86 lists them. I saw a TR86 gear drive advertised for sale a few years ago. They have to be rare!

 

[kirschenman]

There are different size sprockets available on the unloading drive. Check if you have the same number of teeth. If not, you could put the larger sprocket on and have the same speed. They are on new holland parts, fig 093 Auger clutch control part 29. You would want to get the 20 toother.


If you are worried about a TR86 not turning good, then don't look at any other combine on the market!

 

[dragon71]

I checked and the TR70 has a 20 tooth and the 86 has an 18. I see they also offer a 16 tooth. There is a footnote that says both sprockets and chain and idler must be replaced at at the same time. But there is only one option for the driven gear. Wonder why they all need to be done together?

 

[tkfarms]

I checked and the TR70 has a 20 tooth and the 86 has an 18. I see they also offer a 16 tooth. There is a footnote that says both sprockets and chain and idler must be replaced at at the same time. But there is only one option for the driven gear. Wonder why they all need to be done together?

Because the rule is to always never mix a old chain on new sprockets and vise versa!!

 

[dragon71]

I normally do that too.
I called the dealership today about the different sprockets and was told that some have different size shafts they fit on, and some have 50 and some have 60 chain. That's why they want the chain and other sprockets replaced.