[old_master]

Body seal leaks on the HT6 are very common. That alone does not mean that debris has contaminated the system. Remove the fixed orfice tube and check the screen for debris. If there is no debris in the screen, don't bother flushing the system. The tube is inside the inlet line, (lower line), at the accumulator. Remove the high pressure line and remove the orfice tube. If the system has zero pressure for any length of time, it's a good idea to replace the accumulator. It has a desicant inside that absorbs moisture in the system and if exposed to atmosphere, it will absorb humidity. The desicant will absorb only so much moisture and after that, the accumulator must be replaced.

Evacuating will remove oil vapor, (not enough to worry about), moisture and refrigerant from the system. The system must be evacuated to 29.4"Hg, (2 atmosphere's) for a minimum of one hour before recharge, the longer the better.

If you measured the oil that was removed from the original compressor, drain the "new" compressor and add that amount plus 1 ounce. If you didn't measure it, drain the "new" compressor, install it on the vehicle, and add 8 ounces into the low side port on the compressor, connect the lines and turn the compressor shaft by hand at least 10 revolutions to circulate the oil into the system. Then evacuate the system, and recharge using the low side port on the accumulator. It's better to have too much oil rather than too little in the system. Too much oil will reduce cooling efficiency, too little oil will reduce compressor life.

Flushing compound will remove MOST of the oil from the system if done properly. It's impossible to remove all oil from the condenser and evaporator.