Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1982CAVALIER L4-112 1.8LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGSERVICE AND REPAIRDISCHARGING & EVACUATING SYSTEMEVACUATE SYSTEM USING CHARGING STATION
1982 Chevrolet Cavalier L4-112 1.8L
Evacuate System Using Charging Station
1982 Chevrolet Cavalier L4-112 1.8LSECTION Evacuate System Using Charging Station
A vacuum pump is built into the charging station and is constructed to withstand repeated and prolonged use without damage. Complete moisture removal from the system is possible only with a vacuum pump constructed for the purpose.
The system must be completely discharged before it can be evacuated. Damage to the vacuum pump may result if pressurized refrigerant is allowed to enter.
1. Connect hose to vacuum pump, if system was discharged through charging station.
2. Open low side gauge hand valve of charging station.
3. Connect station into 110 volt current.
4. Turn vacuum pump on according to instructions for specific station being used.
5. Evacuate system with the vacuum pump until the low pressure gauge reads at least 28 inches of vacuum. Continue evacuating system for an additional 15 minutes for routine system servicing or 20 to 30 minutes, if any parts have been replaced.
6. Close low side gauge hand valve, then turn vacuum pump "OFF."
7. Check ability of system to hold vacuum. Watch low side gauge to see that gauge does not rise at a faster rate than 1 inch vacuum every 4 to 5 minutes. If low side gauge rises at too rapid a rate, install partial charge and leak test. Then evacuate system again.
8. If system holds vacuum, charge system with refrigerant.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.