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Home >> International >> 1978 >> Scout II 2D Utility, 3.2L Eng, RWD, Automatic Trans, Diesel >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Diesel Fuel Injection >> Adjustments >> Injection Pump >> Injection Volume

Injection Volume

  1. On vacuum governor injection pump, turn set screw at bottom of governor housing until correct maximum injection volume is obtained. See 1976-77, 1978 or 1979 INJECTION PUMP VOLUME SPECIFICATIONS table. To increase injection pump volume, turn set screw counterclockwise. Decrease injection pump volume by turning screw clockwise.
  2. On mechanical governor injection pump, use governor linkage to pull rack all the way to left side of pump (governor end). With rack in this position, install a measuring device (on right or drive end) so that right end of rack is at zero mark on measuring device.
  3. With measuring device set up, remove rack guide screw and install the lock screw that will hold rack in position specified. See 1976-77, 1978 or 1979 INJECTION PUMP VOLUME SPECIFICATIONS table. Set fuel feed pressure, on tester, at 21.3-22.8 psi (1.5-1.6 kg/cm2 ).
  4. On the first volume measurement test, push rack toward full throttle position 0.551" (14 mm) and tighten lock screw so that rack will not move. DO NOT over tighten lock screw or rack will be bent and have to be replaced.
  5. With rack set in correct position, run pump at 750 RPM for 1000 plunger strokes. Volume should be 33.4-35.4 cc. Repeat procedure with rack set at 0.472" (12 mm) from zero mark and run pump at 750 RPM for 1000 strokes. Volume should be 20.2-22.0 cc. Repeat procedure with rack set at 0.393" (10 mm) from zero mark and run pump at 300 RPM. Volume should be 6.4-8.6 cc.
  6. If injection volume is not to specifications, loosen set screw securing the control pinion. Insert a pin or rod, of adequate length, into the hole of the control sleeve. With pin inserted, rotate control sleeve little by little, repeating volume tests, until correct volume is attained.
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