Pages 44–48 (5 pages)

Testing and Diagnosis

From the 1956 Pontiac Air Conditioning Manual

The operational test with the manifold gauge set at 1200 rpm, then cause-and-remedy charts for insufficient cooling, discharge pressure too high or too low, suction pressure too high or too low, and nozzle outlet temperature too high or too low. It ends with the system pressures and temperatures chart for ambient temperatures from 80 to 100 degrees F.

Read this section free, starting at page 44

What this section covers

  • Operational test procedure
  • Insufficient cooling
  • Compressor discharge pressure diagnosis
  • Compressor suction pressure diagnosis
  • Nozzle outlet temperature diagnosis
  • System pressures and temperatures chart
Year
1956
Make
Pontiac
Vehicle
Components and Systems, Heating and Air Conditioning, Passenger Cars
Type
Service Manual
Models
1956 Pontiac passenger cars with factory air conditioning (Frigidaire five-cylinder compressor)
Publication
S-5604AC
Pages
50

What’s inside

Air conditioning shop manual

  1. Description and Operating Instructionspp. 1–4
  2. Principles of Operationpp. 5–19
  3. General Information on Refrigeration Servicepp. 20–24
  4. Inspection, Periodic Service and Adjustments on CarNew car pre-delivery and 2000-mile inspections, periodic filter cleaning and condenser checks, and on-car adjustments of the compressor belt, air valve and thermostat control cables, clutch and relay control switch and thermostatic expansion valve.pp. 25–27
  5. Minor Services and Repairs: MechanicalRepairs that do not open the refrigeration system: control panel, control assembly and cables, blower switch, nozzles, air inlet and filter, blower, air distributor and thermostat, and moving the compressor to service the engine. Pages are in reverse order in this scan.pp. 28–30
  6. Minor Services and Repairs: Refrigerationpp. 31–43
  7. Testing and Diagnosispp. 44–48
  8. Specifications and Special ToolsSpecifications that differ on air-conditioned cars (compressor, belts, Freon capacity, generator, regulator, torques) and the list of J-numbered special tools for servicing the system.pp. 49–50

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