D69U inoperable brake

The source of the grease is the clutch release bearings. The outer fitting on the sprocket or track frame support cannot get into the steering clutch compartment.

I would not give up yet. A proper clean with a volatile solvent might cost a bit, but should restore the braking performance without disassembly. Might even get it with some fresh diesel or kerosene. I would be inclined to put some gasoline in the diesel to get it to cut the grease faster, but you will have to be especially careful about sources of ignition. Might be best to stay with brake clean.

I had gear oil on brake lining on a D6 9U , took the cover off and sprayed engine degreaser on lining several times it seemed to help.

Either or both!

I took the cover under the seat off but you have to remove floor pan and on right side the brake lock assembly.

With proper lifting equipment on hand, I would recommend pulling the fuel tank to get a much better look at things.

Another things to check out for a grease leak would be the hose that carries the grease from the fitting on the deck to throw out bearing.

Also it is possible the brake lining is just worn out.

in my experience with this model, you must removed the final drive (dry side) plug AND the brake adjustment bolt to empty the cavity of fluid. also, diesel doesn't really work to clean brake shoes IMO.
of course gasoline is dangerous........ but works.

if your power steering pump is leaking that could be the source of brake contamination....

lastly - you don't NEED a hoist to pull the deck cover. empty the tank as best you can, then using lumber pieces, on one side then the other, raise it up and forward. once you have the deck cover off you can see your brakes clearly.

don't for get there are access covers on the back of the case - about 6" square ? you may decide to introduce you flush liquid through those spaces.

lastly #2 - after flushing or cleaning your shoes, drive it around for a while. heat may give you some encouragement and they may start working.

[quote="TOGNOT"]in my experience with this model, you must removed the final drive (dry side) plug AND the brake adjustment bolt to empty the cavity of fluid. also, diesel doesn't really work to clean brake shoes IMO.
of course gasoline is dangerous........ but works.

My response........the plug that needs removing has nothing to do with final drives, it is in the bottom of the steering clutch compartment well inboard of the final drive. There is no dry side of a final drive on a 9U tractor, when it is removed from the tractor, the bull gear is exposed. The OP has certainly found the plug already. I am sure removing the brake band support screw would drain a bit more liquid but would have a hard time getting chunks of old grease out the approximately 3/8" hole...............I agree on gasoline or other volatile solvent

if your power steering pump is leaking that could be the source of brake contamination....

My response.......steering booster pump is in the center over the bevel gear compartment, its input shaft seal does commonly leak and drop the oil into the bevel gear/transmission gear case. If the steering booster output shafts seals are leaking, that 30 wt oil would go into the steering clutch compartments. This does happen, so if you are refilling the steering booster regularly and getting lots of lighter weight oil in the steering clutch compartments, that would be a likely source. The other sources of oil would be bevel gear shaft seals and the final drive pinion shaft seals but these should be filled with gear lube.

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I understand what you are saying and agree with you, just don't want to confuse the OP with terminology he is unfamiliar with.

CCjersey, thanks for the de- cipher. I admit things that are clear in my mind quite often make no sense to others 😖mile: