TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
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constants TM 9-2320-280-20-1 POWER TEST (RPM/SEC) TEST #12 Description: This procedure measures an engine’s power producing potential in units of RFM/SEC. Test requires DCA hookup only. Typical Applications: Check engine power in units of RPM/SEC. Test Procedure: 1. Start and idle engine 2. Set TEST SELECT switches to 10 3. Press and release TEST button 4. Observe displayed value (RPM) to adjust idle Speed if necessary. 5. Press down sharply on accelerator end observe displayed value (RPM) to adjust governor speed if necessary. 6. Set TEST SELECT switches to 12. 7. Press and release TEST button. 8. Wait for prompting message CIP to appear. 9. When CIP appears on display, press down sharply on engine accelerator end hold it to the floor. When VTM displays a number, release accelerator. 10. Observe displayed value (RFM/SEC). Pre-Test Procedures: Run Confidence Test. Warm up engine to operating temperature. Possible Error Messages: E009 Engine not running at start of test. E011 Throttle control operated incorrectly. E012 Ignition adapter/pulse tachometer missing. E014 Incorrect number of cylinder entries. E033 Error in entry of power test NOTES Engine idle speed must rechecked before performing power test. Idle spead must be within the range 625-675 RPM (6.2L and 6.5L) range to run test. Engine governor no bad speed must be checked before performing power test. Governor no-load speed must be within the 3900- 4100 RPM (6.2L) end 3600-3600 RPM (6.5L) range to run test. 2-735