Accumulator HVAC: Service and Repair
Remove or Disconnect1. Recover refrigerant.
2. Battery negative cable.
3. A/C compressor and condenser hose fitting at accumulator.
^ Use back-up wrench to hold evaporator fitting while loosening A/C compressor and condenser hose fitting.
4. Accumulator hose fitting at accumulator.
^ Use back-up wrench to hold accumulator fitting while loosening evaporator tube fitting.
5. Bolt/screw at accumulator bracket.
6. Accumulator from bracket.
^ Discard O-rings.
Install or Connect
1. If accumulator is being replaced, drain and measure amount of PAG oil in old accumulator. Add the drained amount plus 30 ml (1 fluid ounce) more of new PAG oil to new accumulator.
2. Accumulator to bracket.
3. Clean fittings with mineral base 525 viscosity refrigerant oil.
4. O-ring to accumulator hose.
^ Lightly coat O-ring with mineral base 525 viscosity refrigerant oil.
5. Accumulator hose fitting to accumulator.
Tighten
^ Accumulator hose fitting to 48 N.m (36 lb. ft.).
6. Bolt/screw to accumulator bracket.
Tighten
^ Bolt/screw to 9 N.m (80 lb. in.).
7. O-ring to A/C compressor and condenser hose fining.
^ Lightly coat O-ring with mineral base 525 viscosity refrigerant oil.
8. A/C compressor and condenser hose fitting to accumulator.
Tighten
^ A/C compressor and condenser hose fitting to 48 N.m (36 lb. ft.).
9. Battery negative cable.
10. Charge A/C system.
^ If installing new accumulator, add 30 ml (1 fluid ounce) of polyalkylene glycol (PAG) synthetic refrigerant oil, GM P/N 12345923. 11. Leak-test fittings.