Tuesday, September 19, 2023

John Deere 855D gator front PTO (4WD) shaft seal

OK sounds and looks easy.

So you think it just pops out and you drive a new one in ?

Ah I don't see it happening with a large lip on casing it would have had to be driven over. 

This is the seal for front wheel driveshaft . Ours has been dripping for a while.

Rain day So I figured I'd jusy pop a new one in.



Removed the old one. 
Which you don’t have to do when splitting the case . 


Pic of new one.
Very ridgid.


Lip I'm talking about that your suppose to be able to drive seal in?


So drive shafts already off along with belt cover ( I thought I might be able to get a better drive angle ) with cover off , It's a tight spot no matter what your replacing on these machines . Remove park brake assembly. 2 bolts and vent unclipped.



Just a screw holds the coupler in place for driveline.



Cleaning up gasket surfaces and tipped machine up a bit to keep fluid away. 
When removing that pinion gear make sure to not loose the shims and reinstall them the same way they came out .



Sealer added to all mating surfaces. grey ultra.

 
Same for case.



Grease the shaft and seal before reinstalling.



If your having an issue putting pinion gear in make sure shims are in place and not binding.


Case installed 


Bolts snugged till gasket just starts to squeeze out and let set up for an hour before torquing down.
I'll let it sit overnight before topping fluid.


Belt cracking .

Replacing now before it goes. Covers already off.

Not a bad job it was more than what I was expecting.


New belt installed and done . 

Just check the fluid in the AM and reinstall tire and mud flap.

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