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) (b) 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 27 min. 0-12 psi (0-83 kPa) 400 WOT 43 min. 400 WOT** 4 max. 700 Low idle 12-16*** 0.5 min. 8-12 psi (55-83 kPa) 700 Low idle **** 0-1 psi (0-7 kPa)** 2000 WOT 56 max. 3200 ADJ 21.5-23.5 3.75-16.25 3400 WOT 48-53 3.00-5.00 3500 WOT 43 min. 3650 WOT 30 min. 3900 WOT 15 max. * Maximum cylinder variation should be ± 6 mm 3 from the average flow of all cylinders. ** With electric shut-off solenoid de-energized. *** Reset using low idle screw. **** Minimum of 1.25 degrees more than reading. 10. Disconnect pump and mount in holding fixture. 11. Using air timing gauge, check pump timing. Set to -2.0 to +0.0 degrees. 12. Total throttle travel from low idle to wide-open throttle should be 75-84 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 1.968 ± .001 in. (49.99 ± .025 mm). With oversize cam ring installed, roller-to-roller dimension will be 1.976 ± .001 in. (50.19 ± .025 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) Mount the pump horizontally in holding fixture and remove governor cover. (b) 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. (c) Using linkage gap tool, check the clearance limits between the rear of the shutoff shaft and the vertical tab on the linkage hook. (d) 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). (e) 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. (f) With the linkage hook pin seated firmly in the governor arm slot and the governor arm in the minimal 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). (g) Recheck linkage gap and adjust if necessary. 2-138