AprilzWarrior
07-31-2004, 09:17 PM
Courtsy PatYuen!
Model: 1996 Jeep Grand Cherokee L6 4.0.
Level of difficulty: Easy
Tools needed: R134a charge gun with gauge.
1. Purchase a R-134a charging gun with gauge. ($20.00)
2. Purchase 3-4 cans of R-134a refrigerant. ($6/each)
3. Locate the low-pressure port of the A/C system. It’s located above the coolant reservoir attached to a metal refrigerant line and capped by a screw in dust cover.
http://images6.fotki.com/v86/photos/1/156060/842693/IMG_0051-vi.jpg
4. Start the engine and set A/C to maximum cooling.
5. Connect the gauge to the low-pressure port and check the pressure. Do not connect refrigerant yet.
6. If pressure is between 65-200psi, DO NOT add refrigerant. The problem is somewhere else.
7. 0-25 psi-add refrigerant; 26-45 psi-system has proper amount of refrigerant; 46-65 psi – DO NOT add refrigerant. Pressure based on ambient temperature of 75-85 degrees Fahrenheit. The pressure will be higher at higher temperature and lower at lower temperature.
http://images6.fotki.com/v92/photos/1/156060/842693/IMG_0057-vi.jpg
8. To add refrigerant, remove gauge from valve and install refrigerant. Reinstall charging gun and add refrigerant. Be careful removing empty refrigerant canister from gun as there will be some refrigerant left in the canister and will spray out when you unscrew it.
9. Metal refrigerant line should start to get cold as it works through the system. Add enough refrigerant until desired pressure is indicated. Do not overcharge. Check visually for leaks.
10. Replace dust cap.
Model: 1996 Jeep Grand Cherokee L6 4.0.
Level of difficulty: Easy
Tools needed: R134a charge gun with gauge.
1. Purchase a R-134a charging gun with gauge. ($20.00)
2. Purchase 3-4 cans of R-134a refrigerant. ($6/each)
3. Locate the low-pressure port of the A/C system. It’s located above the coolant reservoir attached to a metal refrigerant line and capped by a screw in dust cover.
http://images6.fotki.com/v86/photos/1/156060/842693/IMG_0051-vi.jpg
4. Start the engine and set A/C to maximum cooling.
5. Connect the gauge to the low-pressure port and check the pressure. Do not connect refrigerant yet.
6. If pressure is between 65-200psi, DO NOT add refrigerant. The problem is somewhere else.
7. 0-25 psi-add refrigerant; 26-45 psi-system has proper amount of refrigerant; 46-65 psi – DO NOT add refrigerant. Pressure based on ambient temperature of 75-85 degrees Fahrenheit. The pressure will be higher at higher temperature and lower at lower temperature.
http://images6.fotki.com/v92/photos/1/156060/842693/IMG_0057-vi.jpg
8. To add refrigerant, remove gauge from valve and install refrigerant. Reinstall charging gun and add refrigerant. Be careful removing empty refrigerant canister from gun as there will be some refrigerant left in the canister and will spray out when you unscrew it.
9. Metal refrigerant line should start to get cold as it works through the system. Add enough refrigerant until desired pressure is indicated. Do not overcharge. Check visually for leaks.
10. Replace dust cap.