Quantcast d. Injection Pump Settings (Following Pump Repair) - TM-9-2815-237-34_151

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TM 9-2815-237-34 2-34.  1990  (6.2L)  FUEL  INJECTION  PUMP  (DB2829-4879)  CALIBRATION  (Cont’d) (b)  Energize  electric  shutoff  solenoid  and  check  delivery  against  the  chart  below. THROTTLE MM 3 / CAM   MOVEMENT PRESSURE RPM POSTION STROKE” (DEGREES) TRANSFER   PUMP HOUSING 150 WOT 28  min. 12 psi (83 kPa) min. 0-12  psi  (0-83  kPa) 400 WOT 45  min. 400 WOT** 4 max. 650 Low  idle 10-18 8-12  psi  (55-83  kPa) 650 Low  idle 1.25 min. 0-1 psi (0-7 kPa) 1500 21.5-23.5 1.0-3.5 2000 WOT 56 max. 60-62  psi  (414-427  kPa) 2400 WOT 0.5-3.0 3200 Low  idle 9.0-10.0 3500 WOT 48-53 4.5-6.5 3600 WOT 47 min. 3800 WOT 33 min. 4050 WOT 15 max. 125 psi (862 kPa) max. * Maximum cylinder variation should be ± 6 mm3 from the average flow of all cylinders. **  With  housing  pressure  cold  advance  solenoid  energized. 10.  Disconnect  pump  and  mount  in  holding  fixture. 11. Using air timing gauge, check pump timing. Set to -0.5 to +1.5 degrees. 12. Total throttle travel from low idle to wide-open throttle should be 80-84 degrees. 13.  Refer  to  para.  2-7,  Engine  Troubleshooting,  to  diagnose  any  malfunctions  encountered  during checkout. d. Injection Pump Settings (Following Pump Repair) 1. Roller-to-roller dimension must be 1.975 ± 0.0005 in. (50.17 ± 0.013 mm). With oversize cam ring installed, roller-to-roller dimension will be 1.981 ± 0.0005 in. (50.32 ± 0.013 mm). Maximum eccentricity  allowed  is  0.008  in.  (0.20  mm)  TIR. 2.  Linkage  gap  must  be  0.130-0.175  in.  (3.30-4.45  mm). (a) (b) (c) (d) (e) (f) (g) Mount the pump horizontally in holding fixture and remove governor cover. Hold  the  throttle  lever  in  the  wide-open  throttle  (WOT)  position.  Rotate  pump  drive  shaft counterclockwise until a click is heard as the rounded contact points on the governor arm engauge  the  slots  in  the  thrust  sleeve.  Continue  to  rotate  the  drive  shaft  until  the  gap  between the governor arm and pump housing is minimal. Using linkage gap tool, check the clearance limits between the rear of the shutoff shaft and the  vertical  tab  on  the  linkage  hook. If adjustment is required, loosen governor linkage hook adjustment screw and extend the linkage  hook  to  its  maximum  open  length  (throttle  lever  must  be  in  WOT). Insert  the  appropriate  step  of  the  linkage  gap  tool  between  the  vertical  hook  tab  and  the throttle shaft, with the step facing the shaft. The tool must be held vertically and parallel to  the  linkage  hook  tab. With the linkage hook pin seated firmly in the governor arm slot and the governor arm in the  minima]  gap  position  (step  2.(b)),  shorten  the  linkage  hook  assembly  until  the  face  of  the vertical  tab  is  flush  against  the  tool.  Tighten  adjusting  screw  to  12-15  lb-in.  (1  N•m). Recheck  linkage  gap  and  adjust  if  necessary. 2-133


 


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