JD 5420 Transmission part ID

[dedge907]

So I split our 5420 at work to replace a broken park pawl in the tranny and found these pieces laying in the bottom as well. I cannot seem to locate where they go or where they came from. I've searched through the parts diagrams for the tranny as well as the rear diff and hydraulics to no avail. Local JD dealership can't find them either so I figured I'd give it a shot on here and see if anybody recognizes these parts. It's a power reverser transmission with MFWD. Thanks

 

[MORRISONSTEEL]

Could the shaft part be related to the rockshaft control? Ref p/n R105155 ??

 

[beenthere]

:welcome: to TBN

Does the upper left part shown come apart? The pic is a bit blurry, but some different angles on the pic may help decipher it.

A bit scary to find extra parts lying in the tranny bottom.

 

[dedge907]

Here is a little different pic.

 

[dedge907]

 

[MORRISONSTEEL]

View attachment 5420 POWER REV PARK.pdf Could it be broken off of # 13? (power reverser tranny pictured, is different for tss and cs versions)

 

[dedge907]

It's not anything on the rockshaft nor the #13 in the pdf. Those are all intact. The nozzle looking piece is one piece, hollow and pretty thin and the bushing seems to fit on the end of it. I forgot to mention also that last year when I changed oil in the trans/diff I found a small spring that I now assume went with these parts.

 

[jd110]

Is it possible that part circled in blue could be it? It is the only thing I can think of. Not sure of the purpose of this. It is a poppet type valve, but cant find a mention of it in the tech manual.

 

[jd110]

Items 6 - 10 in parts schematic are these parts.

 

[dedge907]

For some reason I can't see your attachments.

 

[Tx Jim]

Items 6 - 10 in parts schematic are these parts.

jd110
You did very good! I think you need a raise in salary.:drink:

 

[Kyle_in_Tex]

Interested to hear how many hours you have on this 5420? I have heard of park pawl problems before, so I make darn sure I'm at a complete stop before I put it in Park to jump off the tractor.

 

[dedge907]

jd110

I see your attachments now. Those are not the parts I found. I had checked that area when I searched for a poppet valve in the manual and that is the only one that came up. This part seems too thin to be part of any valving and the end of it is slotted like it slid on or into something. I'm beginning to think maybe some worker at the factory was having a bad day and tossed in some spare parts :duh:

Kyle_in_Tex

There is a little over 3k hours on this machine. The guy operating it said when he placed it in park and released the clutch it jumped forward like it was still in gear and that is when it broke. I would definitely keep a close eye on your slack adjustments for your shifting cables if you have this machine.

 

[Kyle_in_Tex]

jd110

I see your attachments now. Those are not the parts I found. I had checked that area when I searched for a poppet valve in the manual and that is the only one that came up. This part seems too thin to be part of any valving and the end of it is slotted like it slid on or into something. I'm beginning to think maybe some worker at the factory was having a bad day and tossed in some spare parts :duh:

Kyle_in_Tex

There is a little over 3k hours on this machine. The guy operating it said when he placed it in park and released the clutch it jumped forward like it was still in gear and that is when it broke. I would definitely keep a close eye on your slack adjustments for your shifting cables if you have this machine.

I've also been told the cables for the P,F &R lever need to stay lubed and adjusted FWIW.

Good luck figuring out that part.

 

[jd110]

Another thing occurred to me. There is a bypass valve in the hydraulic filter head. I have never had one out - it is not replaceable. Deere only supplies complete filter head. Here is a diagram from tech manual. If valve is missing, it would allow unfiltered oil too be drawn past filter and into the pump.

 

[dedge907]

Still no luck. John Deere hasn't come up with an answer either. I'm debating on whether just to put it back together but I would hate to find out later that it's something that needs replaced and have to tear it down again.

 

[dedge907]

Finally got it figured out! There is a connection on the side of the transmission case that pipes to the mid mount scv that is actually a check valve. Pulled it off and sure enough the guts were gone out of it. It's number 12 in the diagram. Thanks for all the suggestions guys. View attachment 5420 cv.pdf

 

[Kyle_in_Tex]

Good deal.

 

[beenthere]

:thumbsup:
Going to be much trouble to replace the part?

 

[Kyle_in_Tex]

Side question. How'd you end up in Palmer AK? What kind of work is up there?