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96 Explorer, going to r/r evap core

LH123 on Wed April 23, 2008 3:48 PM User is offline

Year: 1996
Make: Ford
Model: Explorer
Engine Size: 4.0
Refrigerant Type: R134a
Country of Origin: United States

I'm finally going to fix my leaky evap core, just ordered the parts from the guys at ackits. Now for some questions:

Going to change evap and accum.

While the evap is out, I'm thinking of fixing the blend door as a preventitve measure. It seems to work fine, exept for one click when at max or min temp.I pulled the motor and there are no stripped gears. There is an aftermarket blend door kit, does anyone have experience with changing it thru the evap hole? I'm thinking it would be easier.

Now for the charge question...Most of the oil was lost when the evap exploded, nice puddle under the truck. I'm wondering what the best way to recharge. I bought the pag 46, thinking of pouring 3 oz in the accum and 3oz in the evap. Ford has a TSB saying its ok to use more oil for these compressors, so more is better than less. The total charge is 7oz oil.

Also, can a professional machine remove all oil if the charge is all gone? I would rather not flush with solvents since oil otherwise is clean. I know drawing a vac will not affect the oil, just moisture.
I plan on adding the oil, then drawing a vac, then charging with 3 cans of pure R134a (truck takes 33 oz I believe).

Chick on Wed April 23, 2008 10:04 PM User is offlineView users profile

unfortunately, the only way to know how much oil you have would be to flush the system. But, I agree that I would rather have an ounce more than an ounce less, and you seem to be right on with your amount for a GOOD guess.. maybe an ounce less?? No dipstick, so it's just that, a guess,

-------------------------
Chick
Email: Chick

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Freedoms just another word for nothing left to lose

LH123 on Wed April 23, 2008 11:53 PM User is offline

Thanks chick!
A local pro also told me today if he did the repair he would dump up to the whole 7oz of oil in there after what happened and all that time with a hole. He said the pag deteriorates with moisture, and he always overfills those compressors by an ounce or three! He said its a big system and an extra bit of oil reserve has place to go.


Also, the ford factory manual concurs:

NOTE: Service A/C compressors (19703) are shipped without compressor oil.

Rotate the A/C compressor shaft six to eight revolutions while collecting oil in a clean measuring device.
If the amount of oil drained from the old A/C compressor is between 85-142 ml (3-5 ounces), pour the same amount plus 30 ml (1 ounce) of clean PAG compressor oil YN-12-C F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B into the new A/C compressor.
If the amount of oil that was removed from the old A/C compressor is greater than 142 ml (5 ounces), pour the same amount drained of clean PAG compressor oil YN-12-C F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B into the new A/C compressor.
If the amount of oil that was removed from the old A/C compressor is less than 85 ml (3 ounces), pour 85 ml (3 ounces) of clean PAG compressor oil YN-12-C F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B into the new A/C compressor.

For the suction accumulator/drier (19C836), drill two 1/2 inch holes in the suction accumulator/drier cylinder and drain the oil into a calibrated container.
Add a quantity of new oil to match that drained from the old suction accumulator/drier plus 60 ml (2 ounces) of clean PAG compressor oil YN-12-C F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B.

For the A/C evaporator core (19860), add 89 ml (3 ounces) of clean PAG compressor oil YN-12-C F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B to the suction accumulator/drier inlet tube.

For the A/C condenser core (19712), add 30 ml (1 ounce) of clean PAG compressor oil YN-12-C F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B to the A/C condenser core or the suction accumulator/drier inlet tube.

Add 60 ml (2 ounces) of clean PAG compressor oil YN-12-C F7AZ-19589-DA or equivalent meeting Ford specification WSH-M1C231-B to the suction accumulator/drier inlet tube when carrying out each of the following repairs:
installation of a new A/C evaporator core orifice (19D990)
installation of a new A/C compressor pressure relief valve (19D644)
installation of a new refrigerant line
repair of an O-ring seal leak
repair of a charge port leak
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