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Home >> GMC >> 1990 >> Forward Control 4.3 Z, Automatic, 400/M40 >> Repair and Diagnosis >> Engine Performance >> Remove, Overhaul & Install >> Engine Controls - Remove/Install/Overhaul >> Fuel System (Diesel) >> Injection Pump >> Installation
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Injection Pump: Installation

  1. Install new injection pump gasket. Align locating pin on injection pump hub with slot in injection pump driven gear. At the same time, align injection pump timing marks. Cylinder No. 1 must be set at TDC. See Figure.
  2. Attach injection pump to front cover. Alignment marks made during removal must be aligned. Tighten nuts. Attach pump to drive gear and tighten bolts. Reverse removal procedure to complete installation. Check injection pump timing. See INJECTION PUMP TIMING in ADJUSTMENTS article.
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