Trooper LS V6-3.5L (1998)
1. Connect the gauge manifold.
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High-pressure valve (HI) - Discharge-side
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Low-pressure valve (LOW) - Suction-side
2. Discharge and recover the refrigerant.
3. Connect the center hose of the gauge manifold set to the vacuum pump inlet.
4. Operate the vacuum pump, open shutoff valve and then open both hand valves.
5. When the low-pressure gauge indicates approx. 750 mm Hg (30 in Hg), continue the evacuation for 5 minutes or more.
6. Close both hand valves and stop the vacuum pump.
7. Check to ensure that the pressure does not change after 10 minutes or more.
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If the pressure changes, check the system for leaks.
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If leaks occur, retighten the refrigerant line connections and repeat the evacuation steps.
8. If no leaks are found, again operate the vacuum pump for 20 minutes or more. After confirming that the gauge manifold pressure is at 750 mm Hg
(30 in Hg), close both hand valves.
9. Close positive shutoff valve. Stop the vacuum pump and disconnect the center hose from the vacuum pump.
Charging the Refrigerant System
There are various methods of charging refrigerant into the air conditioning system.
These include using J-39500 (ACR4: HFC-134a Refrigerant Recovery/Recycling/Recharging/System) or equivalent and direct charging with a weight
scale charging station.
Charging procedure
ACR4 (or equivalent) method
For the charging of refrigerant recovered by ACR4 (or equivalent), follow the manufacturer's instruction.
Direct charging with a weight scale charging station method
1. Make sure the evacuation process is correctly completed.
2. Connect the center hose of the manifold gauge to the weight scale.
3. Connect the low pressure charging hose of the manifold gauge to the low pressure side service valve of the vehicle.
