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Home >> GMC >> 1985 >> Forward Control 5.7 M, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Air Injection System >> Operation >> Air Pump

Air Pump

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The air pump uses an eccentric (off-center) vane to draw in fresh air, compress it, and force it on through the system. The pump is belt-driven. See Fig 1 .

Fig 1: Eccentric Vaned Air Injection Pump (Typical) Pump supplies air to Air Injection System.
G8750