TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 272 of 890
TM 9-2320-280-20-1 REFERENCE INFORMATION ENGINE LUBRICATION 1. Start Test 10, Engine RPM. 2. Crank or start the engine. Displayed reading is RPM. Cranking RPM should be approximately 200. Idle RPM should be 625-675. Incorrect oil level and type can cause pres- sure problems, leaks, excessive blowby, and other problems. Change 2 2-189 Remove sending unit, refer to (para. 4-25). ENGINE RPM STE/ICE-R TEST 10 1. Connect BLUE Transducer in place of oil pressure sending unit. Dial test 50 (0-1000 psi). Perform offset test. 2. Dial test 01, interleave with RPM. Dial test 50. 3. Start engine and observe display. VTM will display RPM’s, then PSI. ENGINE RPM INTERLEAVE WITH 0-1000 PSI PRESSURE Inspect the oil cooler, oil cooler supply return lines, CDR valve hoses, oil pan, and oil filter. Test CDR valve, (para. 3-9). See the location on parts page to find these parts. ENGINE RPM APPROXIMATE OIL PRESSURE STOP 0 PSI 6.2L IDLE (650 ± 25) 10-15 PSI 6.5L IDLE (700 ± 25) 10-15 PSI 6.5L DETUNED IDLE (700 ± 25) 10-15 PSI 2000 40-50 PSI OIL PRESSURE CHART