John deere power steering hose 4450 - diagram?

[1badmopar]

Today while mowing a pasture I sprang a significant hydraulic leak under the cowl. After pulling off the cowl I noticed it was the center hose at the very top of the firewall. I am assuming
that this is a power steering hose, but had not located a diagram yet to validate. There are 3 lines that enter the cab at the top/center of the firewall, I blew the middle one. It
transitions from hard steel line to a rubber line just before entering the cab firewall. Anyone have a daigram of these lines so i can confirm what it is and what I am in for while changing
them?

 

[1badmopar]

This is the leak. You can also see that it is leaking between the firewall and the insulation. Is this is a power steering hose?

 

[Jim.ME]

I think the power steering is the only hydraulics in that area. Below is a link to the online parts catalog. The steering section has some drawings. Beyond that you would likely need to purchase a technical manual for the 4450.

https://partscatalog.deere.com/jdrc/navigation/equipment/76624

 

[Tx Jim]

Which red arrow is pointing at leaking hose? I think part # AR85228 which subs to RE566455 is hose you need.

This post was edited by Tx Jim on 09/05/2023 at 04:13 am.

 

[1badmopar]

Adding a couple diagrams from my technical manual in case anyone else searches this subject in the future. The hose I blew was the high pressure hose (middle of three). I will go ahead and replace them all while I am there. Now I am researching what it takes to pull the cowling so I can access the hoses. Hoses are on order and will make the repair once they arrive. I will follow up them with any significant updates that could be helpful.

 

[1badmopar]

One more diagram of the power steering hoses.

 

[Tx Jim]

It appears from viewing 4450 parts catalog one needs to know SGB number to get correct hose. It's confusing because tractor serial # & country of sales(Germany) is mentioned.

This post was edited by Tx Jim on 09/07/2023 at 04:14 am.