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Replace oil on Sanden sd-709

woompa on Thu July 08, 2010 4:50 PM User is offline

Year: 1994
Make: Jeep
Model: Wrangler
Engine Size: 4.0
Refrigerant Type: r134a
Ambient Temp: 100
Country of Origin: United States

I am replacing a "home made" A/C system in my Jeep with all OEM parts that I acquired. I want to flush all components and drain compressor oil to ensure no oil contamination. My questions are:
1) Do I drain from oil plug on compressor or just by holding upside down and spinning hub (or both)?
2) Do I add oil at the oil plug or on back of compressor while spinning hub (or both)?
3) What type of oil do I use if compressor and componoents originally used R12, even though compressor has been running r134 for few years now?
4) What amount of oil do I add and is it OK to add all of it to compressor or do I need to add in the lines as well?

I know its a lot of questions but I truly believe I had the system overfilled with oil (my old more=better mentality) and I want to get it balanced correctly. Thanks for any help.

HVargas on Thu July 08, 2010 6:31 PM User is offlineView users profile

1) You can drain from either place. I would remove the compressor, turn it upside down and turn the hub a bunch of times until oil stops coming out. Then fill with the oil you will be using and repeat the process to make sure that you are getting as much out as possible. Then add the correct amount of oil to the compressor.
2) You can put it in either spot.
3) If you are going to stick with R134a, I would recommend using our BVA Auto 100 oil.
4) The factory calls for 4.5oz of oil. I would put about 3/4 in the compressor and the rest in the drier.


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