dear friends i have wheel loader 988f cranking but not running , power to injectors not reach , fuel is reaching good any suggest where to look and where i can find the crank sensor and how to check it ecu have power 24 volts in 3 places for input socket
This machine has a HEUI fuel injection system in the engine. It depends on hydraulic pressure to activate the injectors. Leaks in the hydraulkic system (pump or injectors) will cause a no start situation. The electronic system will not activate until sufficient hydraulic pressure (about 3,000psi) is produced during cranking. Follow the tubes from the high pressure oil pump to the cylinder heads. Observe where the tubes connect into the cylinder heads. If you then look at the opposite end of the cylinder head in the same location you should find a blank plug. Install a 5000psi gauge on one of the cylinder heads, crank the engine on the starter and record the pressure. Also you should be aware that these engines are very sensitive to cranking speed. Good batteries and starter motor are very important. A cranking speed of 150 RPM on the starter is an absolute minimum, over 165 RPM is preferred. With a cranking speed around or below 150 RPM it is highly unlikely that the engine will start even with the injection system in perfect condition.
Need a Serial Number. There were a lot of breaks in the 2ZR machine production. It would also be a good idea to have the engine Serial Number for reference.
thank you dear can you also drop the electric schematic to my email please to check the power and also the batteries wiring are not in place so how to connect the batteries please [email protected] i have + and - in both sides with 4 batteries
I need a machine Serial Number so as to locate the correct schematic. Here is the battery wiring diagram. It needs 4 batteries in good condition plus a starter motor in good condition to get the correct cranking speed.
the engine now cranking with good speed but dont have power coming to ecu
2zr01824*