K 3500 Truck 4WD V8-6.5L DSL Turbo VIN S (1999)
Hose/Line HVAC: Service Precautions
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Ensure that the metal lines do not exhibit the following conditions.
This will prevent the loss of system capacity due to line restriction:
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Dents
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Kinks
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Do not bend the flexible hose line to a radius of less that 4 times the diameter of the hose.
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Do not allow the flexible hose line to come within a distance of 63.5 mm (2 1/2 in) of the exhaust manifold.
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Inspect the flexible hose lines regularly.
Replace the flexible hose line with new hose if one of the following conditions exist:
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Leaks
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Brittleness
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Deterioration
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Proper O-Ring Installation
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Improper O-Ring Installation
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Before disconnecting any fitting in the refrigeration system, discharge all of the Refrigerant-134a. Refer to Refrigerant Recovery and
Recharging. See: Refrigerant/Service and Repair
Once you open a refrigerant line to the atmosphere, cap or tape the line immediately. This will prevent any of the following items from entering the
line:
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Moisture
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Dirt
