Model: Hilux Pickup xtracab
Engine Size: 3.0
Refrigerant Type: 134a
Hi all. I hoping that someone here can help a new guy out here.. I have a late 94 Toyota pickup with factory 134a. A/C worked great till it got a hole in the condenser. I had to replace the condenser, drier, liquid tube twice( thanks alot toyota) all the o-rings, and hi press hose. After removing the parts and having to wait a week for the liquid tube, I sealed the system so I can still use the truck. I figured I still need to vacuum the system. The tag on the truck calls for 1.43lbs 134a and ND 8 oil. I have been told that since I cannot find ND 8 oil that PAG 46 is the replacement is that right? I have 1-8 oz bottle of PAG 46 with ice 32 and 2-13oz (11oz 134a and 2oz sub zero) cans refringent. How much oil do I put in the condenser and drier? Should I remove the compressor and drain the oil? After I get this all done and I go to add the refringent what should my pressure reading be? Thank you
To ensure you get as much oil out of the system as possible, if you don't have the equipment to flush the remaining components, I would remove the compressor and drain the oil and start with the factory recommended 6-7 ounces of PAG 46 oil. I would put 4-5 back in the compressor after draining it and the rest in the receiver drier. As far as charging with refrigerant, make sure after all of the parts are installed to vacuum the system for at least 30 minutes since it has been open for so long. Even though you sealed it off, air/moisture still probably entered the system. Let it sit for a while to ensure everything is still sealed and the vacuum holds. After that, charge the system with ONLY virgin R134a. Dupont, Johnsens, any company that sells JUST R134a in a can. No oils, sealers, miracle additives or anything else. Just straight R134a. As far as pressure's, specifications at 86*-95* ambient are 21-36psi on the low side and 199-228psi on the high side.
Thank you so much..That helps me out completely...One other question? as far as the refringent..What exactly is the sub zero additive and what harm can it do?
My suggestion. Don't put anything in the system except refrigerant and oil. Magic in a can products have been around for years now. Still waiting to see one the actually works.
Ok thank you..Also on a side note For all to read..I just found out the hard way that in 94 toyota did a mid yr change to 134a and was considered dealer installed. So the discharge hose is different..Don't bother calling part houses for it..Dealer item only..Part # 88720-35330
or you can rebuild them for half the cost.
I hate to be a total dunce here but i cant seem to find a temp chart for the pressure readings...Its only 60 degrees here so im not too sure what the reading should be..can anyone help me out here?
I only have readings for when ambient temperature is 86-95ÃÂ°F (30-35ÃÂ°C).
System Operating Pressures (4)
Low Side 21-36 psi (1.5-2.5 kg/cm2 )
High Side 199-228 psi (14-16 kg/cm2 )
Well i had no leaks, so that part is fixed, i only had 2 cans 11oz ea which in conversion should be right (1.43 lbs max) 22.8 oz..its getting cold however it keeps cycling on and off...do i need more 134a? my readings were 20 low 150 high give or take 5 lbs
Not to bring up an old thread but I wanted to find out if anyone else has ever experience the Discharge hose problem? Apparently that dealer number is no good as well..The repaired hose only lasted 2 seasons.
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