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Injection Pump Timing

NOTE: Before starting timing procedure, check valve timing and drive belt tension.
  1. Set crankshaft to TDC on No. 1 cylinder and align marks on flywheel and clutch housing. Check marks on injection pump sprocket and mounting plate.
  2. If timing adjustment is necessary, remove plug from injection pump cover and install adapter and dial indicator in place of plug.
    CAUTION: Do not loosen screw No. 2 or pump recalibration will be necessary.
  3. Preload dial indicator (2066) to .097" (2.5 mm). See Fig 1 . Slowly turn engine counterclockwise until dial indicator needle stops moving. Zero indicator.
    Fig 1: Adjusting Injection Pump Timing
    G34582
  4. Turn engine clockwise until TDC mark on flywheel lines up with reference mark. Check dial indicator reading. See INJECTION PUMP TIMING SPECIFICATIONS table.
    INJECTION PUMP TIMING SPECIFICATIONS

    Application In. (mm)
    Turbo Diesel
    Check Specification .035-.039 (.90-1.0)
    Adjusting Specification .039-.040 (.98-1.02)
    All Others
    Check Specification .037-.041 (.95-1.05)
    Adjusting Specification .039-.040 (.98-1.02)
  5. If necessary, loosen bolts on mounting plate and support. Turn pump to adjust timing and tighten bolts. Recheck dial indicator readings.
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