JD 855

[acelr8]

My 855 has a Yanmar 3tn75rj.Am having trouble finding an exact replacement and JD wants 5K. What else will fit fairly easily? Thanks for your help.Jeff

 

[twarr1]

You might already know; the 3TN75RJ was also used in the F1145 commercial mower.
Is your current engine re-buildable? Engine kits are readily available.

 

[acelr8]

Rod through block so its dead.Looking for info if another 3TN will be close to the same and can make work.Found a 3tne84.Looks close.May try it.

 

[Mechanos]

Dont see why it wouldn't fit. That's the engine used in the 955 which pretty much shares all the dimensions of the 855 (in regards to the engine compartment). I have a 3TNE88 in my 955 and it fits like a glove.

BTW... does your 855 have the fuel tank in front of the radiator? Or is it between the engine and operator's station?

 

[twarr1]

The 3TN84 from a 955 should be close, although it's not identical. (Water pump, cooling fan, oil cooler, etc). It's also indirect injection as opposed to the direct injection of the 3TN75.
Mechanos brought up the fuel tank location. This may be a concern, you'll have to do more re-plumbing/fabrication if your 855 is an earlier model with the fuel tank in front of the radiator. All 955's had the tank between the operators station and engine.

I've never heard of the 3TNE88.

Let us know how it works out.

 

[pennwalk]

You might try Wengers (Wengers Of Myerstown - Farm Equipment, Agriculture Equipment, Tractor Parts, Construction Equipment, Construction Parts) they have a big used parts dept.

Chris

 

[JD755]

The 3TN84 from a 955 should be close, although it's not identical. (Water pump, cooling fan, oil cooler, etc). It's also indirect injection as opposed to the direct injection of the 3TN75.
Mechanos brought up the fuel tank location. This may be a concern, you'll have to do more re-plumbing/fabrication if your 855 is an earlier model with the fuel tank in front of the radiator. All 955's had the tank between the operators station and engine.

I've never heard of the 3TNE88.

Let us know how it works out.

The 3TN84 in the 955 is direct injection. The 3TNE88 was used in the 4400 and 4410.

 

[Mechanos]

Not sure what my 3TNE88 came out of.... it's a non-JD engine. According to it's data plate, it is rated at 37hp. It was in the tractor when I bought it.

 

[twarr1]

The 3TN84 in the 955 is direct injection. The 3TNE88 was used in the 4400 and 4410.

I stand corrected.

 

[dfkrug]

My 855 has a Yanmar 3tn75rj.Am having trouble finding an exact replacement and JD wants 5K. What else will fit fairly easily?

JD has an engine for sale? Even when I rebuilt my last 955 engine 5 y
ago, it was out of production, and the only units available were stashed
in some dealer's warehouse. (I did find one for sale for $5400 BTW.)

The neat thing about the x55s is there is no foot clutch, so the bellhousing
does not bolt up to the HST or gearbox. You have a simple drive shaft
with rubber coupling, and the engine sits on top of a frame. Engine
swaps should be much easier than on other tractors.

Of course, almost all blown engines are rebuildable.

 

[acelr8]

Front tank but I am going to try it.Engine is complete with exh and airbox.Just as come from a reel mower.I'll let you know how it works out.Being shipped in now.Jeff

 

[Mechanos]

Front tank but I am going to try it.Engine is complete with exh and airbox.Just as come from a reel mower.I'll let you know how it works out.Being shipped in now.Jeff

May still work.... I'm not 100% certain, but I think JD switched to the mid tank so they could add more capacity to the tank since the 3tn84 is a bit more thirsty than the 855's engine. Seems like the mid tank design also offers more air flow through the radiator than the front tank design.