Another JD 2155 Hydro Thread

[Zebrafive]

Big "No" to the water... IMO

Times TWO DO NOT use water!!!

I agree that water is very bad for brake linings.

I also concur water and brake linings do not play well together

 

[jd110]

No, there was nothing in or around the filter relief valve.
Well thats interesting about the brakes. You state that the debris in screen does not appear to be from the parking brake. Could it be from the service brakes?
I was going to try to finish this job not using the brakes unless absolutely necessary. Do you think thats a good idea or do you think it is not contributing to the debri in the screen?
Do you think trying to flush tranny with water (to be easy on the environment) would be worthwile?



Thanks!!
Gary

Yes it does look like the debris is from service brakes. Do not flush with water unless you are going to completely gut the transmission and can be sure to get it absolutely dry. I would recommend flushing it out with diesel fuel while final drives are off. If you do opt to remove rockshaft housing, you can flush it easier. After cleaning as well as you can, fill with clean transmission oil and then run it maybe 10 hours then drain and check the screen and change the filter again. If there has been a lot of metal contamination as well as brake lining, I would change the oil again at 10 hours as well.

 

[Peterpiper]

The top of the trans does not have to come off to replace the brakes, although it can be helpful to flush out the housing. Inferior or improper oil can help deteriorate brakes, but the biggest enemy of wet brakes is water. If the oil gets contaminated with water, it loosens the lining from the brake disks. There are no rivets in the service brakes on a 2155, but there are some rivets in the park brake band. The material in the screen appears not to be parking brake. I see you included photos of the filter relief valve. Was there any debris in the slot in the side of it? That is where dirt usually gets stuck causing the plunger inside to stick open.

You were right jd110, the vacuum was puling the debri away from the screen. After draining the oil and cleaning screen and case as best as I could, everything works great now!
Except for the brakes. I am just not going to use them. I didn't even attempt to bleed them.
You said that you don't think the debri looked like it was from the parking brake.
Do you think it comes from the service brakes?
Thanks
Gary
Ooops, didn't see that you already answered my questions.
Thank you and everybody for all your help!

 

[DLTTrekkers]

Not repairing the brakes is a bad move !

 

[glkirk]

Not repairing the brakes is a bad move !

So, I have to continue to clean the pick up screen of debri from the brake linings!

I have to remove the filter also in this procedure.

My questions are-Can I remove the pick up screen and just clean off or even replace the filter when needed?
Does anyone know the routing of the oil?

Thanks
Gary

 

[Tx Jim]

Not repairing the brakes is a bad move !

DITTO. If the fine metal brake filings make it to frt hyd pump,steering valve & scv's they will have to be refurbished

 

[jd110]

The sump screen is the only filter that protects the transmission pump. If you remove the screen, the transmission pump will not last very long I am afraid. The oil routing is sump screen to the transmission pump, then to the filter, then the oil goes to the shifter cover if you have hi-lo or independent pto. The pressure relief valve controls pressure for transmission functions and some is bled off for lubrication of transmission. Then oil that is left over goes to main pump up front. If pump up front is not demanding oil, it then fills the front reservoir and then through the cooler and back to the transmission case through the cooler relief valve.