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

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Out of Chassis Run-In TM 9-2815-237-34 Section VI. FINAL INSPECTION 2-42. GENERAL Following any major repair to the engine, the engine must be run-in, and tests made prior to release for issue to user. Paragraph 2-43 contains instructions for engine run-in. 2-43. ENGINE RUN-IN This task covers: Out of Chassis Run-In INITIAL SETUP Test Equipment Manual References Dynamometer TM 9-2320-280-34 NOTE This procedure should be performed in a well-ventilated work area. If engine dynamometer is available, follow manufacturer’s instructions for its use. If dynamometer is not available, refer to TM 9-2320-280-34 for In Chassis Run-In. 1. Connect engine to dynamometer, CAUTION l Operating an engine without sufficient lubricating oil will cause damage to engine. If any leaks or abnormal noise is noted, stop engine immediately and correct as necessary. Any abnormalities must be corrected before proceeding to the next test interval. Oil pressure should be 40-50 psi (276-345 kPa) under load and 10 psi (69 kPa) minimum at idle. If oil pressure does not meet specifications, stop engine immediately and correct as necessary. Oil temperature must not exceed 260°F ( 127°C) and coolant temperature must not exceed 230°F (110°C). If coolant temperature or oil temperature exceed limits, stop engine immediately and correct as necessary. 2. Start engine and run-in according to schedule in table 2-1. 2-188