MF 85 tractor

[farmerscotty]

Ok blew the motor up today in my 85 gas.....have a 85 diesel setting here with one rear axle off and final drive.

have one to put on it......but was wondering.......

where could I split the gas tractor to mate to the diesel I know I can at clutch........what about just the rear end assembly?


trying to figure out how to make one out of the 2 quickly........

ideas appreciated.........

thanks

 

[Dieseltech]

While the diesel will bolt to the gas transmission, the DIESEL starter WON'T FIT. Diesel tractors had a larger starter nose, and MF changed the diesel transmission starter area.

 

[hymie2lt]

I may be wrong here and Dieseltech may correct me. Can you just change the engine and flywheel to make the two tractors bolt up and have the starter fit as well? It works on the super 90 which is the next series up from these tractors.
Wayne

 

[willowbk]

Burgh Equip in Pennsylvania had a couple of 85 gas units last fall. Might be worth the call to see what he can do. Prices are always good there.
Good luck.

 

[farmerscotty]

so what do you use for the starter if you put the perkins engine in?

 

[Bob N.Y.]

The 85 diesel is a Continental HD277. The Super 90 had the Perkins 302.

 

[hymie2lt]

You might be able to put everything forward of the diesel flywheel including the starter and flywheel into your gas tractor rear. I am not certain of this but I know it will work on a super 90. I know the 90 has a different engine...I am only using this as an example. There should be somewhere in the two tractors that you can switch front ends. Again I have never done it in the 85/88 models...so maybe I am wrong.
Wayne

 

[farmerscotty]

I have a mf 85 that has the 5 liter perkins diesel engine in it.....was a gas tractor because it has the linkages for the carb


serial number 800722

I cannot tell but looks like the perkins starter is on it...will look better tomorrow........

I know the perkins engine was off a combine........has a different injection pump I think....it has really fast pickup........I have 2 MF 285's and this one cracks the whip compared to them on the throttle.

 

[farmerscotty]

I also know the 85 diesel engine is just a tad smaller than the 285 engine..

 

[Dieseltech]

The combine injection pumps were set a bit higher on max fuel setting than tractors were. Not much, but enough to feel the difference..

 

[fdt860]

I think biggest difference in throttle response is that the CAV pump fitted on combines are not using the same holes in the governor spring linkages. A combine engine as a "steeper" slope, meaning that there are less RPMs between high idle and full load.