1 page 1 ENGINE 3-1-15 Models J08C-TP and J08C-TR Symptom Possible cause Remedy Excessive smoke Black smoke G Excessive fuel delivery caused by ................ Adjust fuel delivery on test stand incorrect adjustment of full load G Excessively advanced injection timing. ......... Correct it stopper screw G Large spread in fuel delivery ......................... Adjust it G Bad nozzle fuel spray characteristics ........... Check and correct them G Unused after glow system............................. Use it White smoke G Improperly retarded injection timing .............. Advance injection timing G Water in fuel ..................................................
Check and clean fuel lines G Glow plug not operating ................................ Check glow plug circuit. Refer to ELECTRICAL EQUIPMENT in CHAPTER 20 Low idle speed Improper adjustment of throttle control knob .. Correct it irregular Bad fuel spray characteristic of nozzles. ...... Check and repair them Incorrect injection timing ............................... Correct it Incorrect initial tension setting of................... Adjust or replace it idling spring or the spring broken. Control rack does not move smoothly........... Disassemble pump and repair it Large spread in fuel delivery ......................... Adjust it Plunger worn .................................................
Replace it Governor linkage does not move smoothly... Correct it Defective feed pump ..................................... Disassemble and repair it Engine always runs Accelerator cable sticking ............................. Check and correct it at high speed Governor linkage sticking ............................. Disassemble and repair the governor Control rack sticking...................................... Check and correct it Loud knocking Improper injection timing............................... Correct it Bad fuel nozzle spray pattern . ..................... Check and correct it after-dribble High nozzle opening pressure ......................
Adjust the opening pressure Incorrect fuel deliveries to ............................. Readjust the fuel deliveries some nozzles.