TM-9-2320-280-20 HMMWV Technical Manual Unit Maintenance Volume 1 Download
Page 188 of 890
TM 9-2320-280-20-1 REFERENCE INFORMATION Governor no-load speed is with the transmission in neutral. Loaded speed is with the transmission in gear and the vehicle moving. It is the maximum rpm’s the engine will develop. The engine will surge at governor speed since the governor will try to lower the engine speed and the accelerator is trying to increase it. A number over 75 is passing for STE/lCE-R test 13. tf the vehicle seems to be low on power while driving you have to check for other things which could cause this such as the transmission. To try a road test, accelerate the vehicle from 0 to a safe and reasonable speed on a reasonably level road. NOTE If the exhaust is not colorless it must be either white, blue or black. If exhaust color is: FUEL SYSTEM WHITE . . . . . . . . . . Go to G, Page 2-122. Also could be injector timing. Notify DS maintenance. BLUE . . . . . . . . . . . . Blue smoke is a sign of oil entering the combustion chambers. It usually enters pest the piston rings or intake valve stem seals. This is an internal engine problem that can't be handled at this level of maintenance. You may want to run the Engine Running Mechanical tests, Page 2-47, before you notify DS Maintenance. BLACK . . . . . . . . . Air lntake/exhaust, Page 2-137. 2-101