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TM-9-2815-237-34 HMMWV Engine Direct Support & General Support Maintenance Manual Download

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TM 9-2815-237-34 2-33. PRE-1990 (6.2L) FUEL INJECTION PUMP (DB2829-4523) CALIBRATION (Cont’d) NOTE Any changes to pump or settings after this point will require retesting of pump, starting with step 16. 18. Fuel delivery measurement: (a) In order to minimize variations between readings due to residual oil in the graduates, the following timed cycle should be used: (1) Draw (2) Settle 30 seconds (3) Drain 30 seconds (4) Draw (5) Settle 30 seconds (6) Read graduates (7) Repeat cycle and average readings (b) Check points: (1) At 1500 rpm (WOT) de-energize electric shutoff solenoid. Delivery should be 4 mm 3 /stroke maximum. (2) Re-energize electric shutoff solenoid and check delivery against the chart below. THROTTLE MM 3 / CAM MOVEMENT PRESSURE RPM POSITION STROKE* (DEGREES) TRANSFER PUMP HOUSING 150 WOT 28 min. 12 psi (83 kPa) min. 400 WOT 47 min. 400 WOT*** 4 max. 650 LoW idle 12-16 1.5 min. 650 Low idle 2.75 min. 0-1 psi (0-7 kPa)** 1500 21.5-23.5 2.5-4.5 8-12 psi (55-83 kPa) 2000 WOT 51.0-55.0 0.5-2.5 8-12 psi (55-83 kPa) 3200 WOT 4.25-6.75 8-12 psi (55-83 kPa) 3200 Low idle 10.0 max. 8-12 psi (55-83 kPa) 3600 WOT 46 min. 3900 WOT 44 min. 4200 WOT 8 max. 135 psi (931 kPa) max. * Maximum cylinder variation should be ± 6 mm 3 from the average flow of all cylinders. ** With housing pressure cold advance solenoid energized. *** With electric shutoff solenoid de-energized. 19. Disconnect pump and mount in holding fixture. 20. Using air timing gauge, check pump timing. Set to +0.25 degree* 0.50 degree. 21. Tighten all fasteners to specifications, refer to para. 2-32d. 22. Apply sealing compound as follows: (a) Apply one drop at interface of maximum travel screw and locknut. CAUTION Do not allow sealing compound to enter gap between face cam and housing. Binding of the throttle shaft may result. (b) Apply one drop to threaded end of face cam screw where it protrudes from face cam. (c) Apply one drop to interface of servo advance adjusting screw and rocker lever, making sure sealing compound does not enter hex recess of screw. 2-130