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 This task covers: a. Test Bench Requirements c. Injection Pump Check (Prior to Service) b. Injection Pump Information d. Injection Pump Settings (Following Pump Repair) INITIAL SETUP: Tools Manual References General mechanic’s tool kit: TM 9-2815-237-34P automotive (Appendix E, Item 1) Test Equipment Special Tools Digital tachometer Roller-to-roller setting tool Voltage source (variable) (Appendix E, Item 45) Pressure gauge (0-160 psi, 1 psi increments) Linkage gap tool (Appendix E, Item 49) Pressure gauge (0-30 psi) Automatic advance indicator (Appendix E, Item 50) Vacuum gauge (0-30-in. Hg) Flowmeter with three-way valve Throttle lever gauge (Appendix E, Item 51) Temperature gauge (0°-250¯F) Protractor (Appendix E, Item 52) Zero-backlash coupling device Air timing gauge (Appendix E, Item 53) Calibrating nozzles and lines Holding fixture (Appendix E, Item 46) Orifice 13211 Torx drive (Appendix E, Item 42) Calibration stand Materials/Parts Calibrating fluid (Appendix B, Item 4) Sealing compound (Appendix B, Item 19) NOTE The following calibration procedure applies to 1990 6.2L and above fuel injection pumps. Refer to para. 2-33 for calibration on pre-1990 6.2L pumps and para 2-35 for 6.5L pumps. a. Test Bench Requirements The fuel injection pump requires a test bench capable of at least 2250 rpm shaft speed. The test bench must be equipped with the following items: (a) A zero-backlash coupling device. (b) A digital tachometer. (c) A variable voltage source. (d) Test gauges: (1) (2) (3) (4) (5) 0-160 psi (0-1103 kPa) pressure gauge calibrated in 1 psi increments to measure transfer pump pressure. This gauge should be located as close as possible to the pump, with an in-line shutoff valve located at the pump. 0-30 psi (0-206.9 kPa) pressure gauge to measure housing pressure. 0-30 in. Hg (0-101.3 kPa) vacuum gauge to measure transfer pump lift. This gauge should be in the supply line to the pump, with a shutoff valve between the gauge and the oil source. A flowmeter for measuring return oil should be used with a three-way valve to permit the flowmeter to be in use only during the return oil check. 0°-250°F (-17.8°-121.1°C) temperature gauge, located at the pump inlet, to monitor inlet temperature. 2-131