[Mark]

All those red lines are from the R-12 days….and at some point they all leak….I am in the middle of changing all the lines along with EXPs on my coach and it is a PITA…

[Allan]

I have a 1995 Marathon 0300 w/ OTR.

I have never commented on this site so I hope this goes through.

I would be glad to discuss how I replaced the hoses on my bus with the correct type of hose for the R134a.

I have just completed the issue of replacing these original hoses on my bus due to changing the system over to R134a. The old orange hoses cannot withstand the pressure required of the 134a gas.

A new hose can be rerouted to avoid dealing with the fact that you cannot get to the connection on the driver side above the fuel tank.

[Davy]

Enlighten us David on the fix.

[Bob]

I have created a Word document with photos and explanations of what I did to reroute the size 20 hose as discussed in the thread. If someone can explain to me how to attach this document, I will be glad to do so.

Please feel free to email me at: david@phelps-companies.com

I will be glad to send this document to anyone.

UPDATE: Document posted in Diagnostic and Repair Nuggets

[Robert]

Try “printing” it to a PDF first. Your version of Word might have option off the Print menu. That should make the document smaller and freeze the pictures from moving around. I’d recommend numbering the pages in the footer, putting a date on it, and make sure you give yourself credit as the author.

[Archived]

After converting to PDF, put it in Diagnostic & Repair Tidbits.

[Archived]

A/C hose is made to tolerate POG oil in modern refrigerants. Hydraulic hose does not comply with synthetic oil compounds and will eventually leak. A/C fittings are different as well. If you’re running 134A, you need refrigerant rated hose. Hyspeco in Kansas City sells Parker. My 1994 Liberty was fitted with Eaton when it was built. I’m buying Parker hoses now because Hyspeco can deliver any hose configuration in no more than a week.