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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 2-34. 1990 (6.2L) FUEL INJECTION PUMP (DB2829-4879) CALIBRATION (Cont’d) 22. 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’/ CAM MOVEMENT PRESSURE RPM POSITION 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. 400 Low idle*** 650 Low idle 12-16 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 mm 3 from the average flow of all cylinders. ** With housing pressure cold advance solenoid energized. *** Check electric shutoff solenoid for pull-in with 17.6 volts maximum. 23. Disconnect pump and mount in holding fixture. 24. Using air timing gauge, check pump timing. Set to +0.25 degree ± 0.50 degree. 25. Tighten all fasteners to specifications, refer to para. 2-32d. 26. 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. 27. Install tamper-proofing cap on guide stud. 2-135