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Super Contributor

Re: 3412 HEUI Slow to start

You'll need Cat ET to read the software part number. The number posted is the software in the MPD.
Contributor

Re: 3412 HEUI Slow to start

Serial Number 9KS01841

Injectors 198-6877

Software 244-1029-00

Super Contributor

Re: 3412 HEUI Slow to start

Post engine serial number, injector part number that was installed and engine software part number.
Contributor

3412 HEUI Slow to start

Cat 3412 is becoming slow to start, this is because the oil pressure is taking a long time to build up.

 

Also we have just had a bore-scope done due to elevated oil consumption, after the injectors were replaced we could not start the engine and had to disconnect the suction pipe from the HEUI pump and manually fill with oil 3 times before it would start.

 

Is this normal?

 

Looking at the HEUI drawing (below) there are non return valves on the injector supply lines which should stop the oil draining out of the pump? So it would seem that these non return valves are not closing 100%?

 

Secondly at high load 70%+ we are consuming close to 2lt oil per 10hrs which is 4x normal oil consumption, bore-scope looked good no visible smoke, injectors were sooty, is it possible we are loosing oil through the HEUI system?

 

HEUI-fuel-system.jpg