TM-9-2815-237-34 HMMWV Engine Direct Support & General Support Maintenance Manual Download
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TM 9-2815-237-34 2-35. (6.5L) FUEL INJECTION PUMP (DB2831-5149) 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 (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 Low idle 28 min. 16 psi (110 kPa) min. 0-12 psi (0-83 kPa) 400 WOT 43 min. 400 WOT** 4 max. 400 Low idle*** 700 Low idle 12-16 1.0 min. 8-12 psi (55-83 kPa) 700 Low idle 1.25 min. 0-1 psi (0-7 kPa) 2000 WOT 56 max. **** 60-62 psi (414-427 kPa) 3200 ADJ 21.5-23.5 4.0-6.0 3400 WOT 49-52 3.50-4.50 3500 WOT 45 min. 3650 WOT 31.5 min. 3900 WOT 15 max. 125 psi (862 kPa) max. * Maximum cylinder variation should be ± 6 mm 3 from the average flow of all cylinders. ** With electric shut-off solenoid de-energized. *** Check electric shutoff solenoid for pull-in with 8.8 volts maximum. **** Minimum of 1.25 degrees more than reading. 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 housing. Binding of the throttle shaft may result. and (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-proofmg capon guide stud. 2-140