Navigator 2WD V8-5.4L SOHC VIN L (1999)
Compressor/Pump: Description and Operation
The RAS air compressor:
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is not interchangeable with a 4-Wheel Air Suspension (4WAS) compressor.
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consists of He compressor and vent solenoid; neither are replaceable as individual items.
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is a single cylinder electric motor driven unit that provides pressurized air as required.
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is powered by a solid state relay which is controlled by the air suspension control module.
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passes pressurized air through the compressor air drier that contains silica gel (a drying agent). Moisture is then removed from the compressor air
drier when vented air passes out of the system during vent operation.
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air drier has a single port and is not interchangeable with 4WAS, compressor air drier.
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air drier may be replaced separately.
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incorporates a snorkel that may be replaced separately.
The vent solenoid:
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allows air to escape from the system during venting actions.
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is part of the air compressor cylinder head.
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has a 1,103 kPa (160 psi) internal relief valve.
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shares a common electrical connector with the air compressor motor.
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is enclosed in the cylinder head casting, which forms an integral valve housing that allows the valve tip to enter the pressurized side of the system.
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has an O-ring seal that prevents air leakage past the valve tip.
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opens when the air suspension control module determines lowering is required.
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provides an escape route for pressurized air that opens when system pressures exceed safe operating levels.
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is replaced with the air compressor as a unit.
