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Ford E-450 bus AC conversion - Add how much?

roach711 on Mon July 01, 2013 11:25 AM User is offline

Year: 2000
Make: Ford
Model: E-450 cutaway bus
Engine Size: 7.3L
Refrigerant Type: R134A

Hi all!

I have a 2000 E-450 cutaway bus (7.3L diesel) that originally had the AC condenser and fans mounted on the roof with no engine mounted condenser. I removed that system to make room for the RV conversion and now I'm working on restoring the AC system back to a "normal" van (front only) AC.

I've removed the old rear hoses and installed a new condenser in the engine compartment and also replaced the accumulator/dryer, the orifice tube and one of the low pressure hoses. The old system was holding pressure when I removed it and the old orifice tube was squeaky clean. The AC sticker inside the hood is for the old roof mounted system so I can't use those specs.

I'm getting ready to recharge the system so what I need to know is the amount of oil and refrigerant to add. Also, is it best to remove the compressor and drain/replace the old oil or can I just add new oil by opening the low pressure return hose and pouring in the new oil before vacuuming and recharging?

Thanx! Rick from Farmington

roach711 on Mon July 01, 2013 1:03 PM User is offline

roach711 on Mon July 01, 2013 1:06 PM User is offline

Never mind, I found the system capacities listing.

For anyone who's interested, my system needs 44 ozs of R134 refrigerant and 9 ozs of PAG 46 oil.


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