Philip Harding
New Member
My Komatsu pc78uu will start fine then shut down after 3 seconds. No error codes or warning lights and no fuel issue. any ideas? Thanks
Yea shuts down like you turned off the key, did it first whilst I was operating it normally, it just cut out for no reason like it was switched offYou should probably describe what you mean by "shut down after 3 seconds." Does the engine stop like you turned off the key or is it lugged down like the pump is pulling more horsepower than it can put out.
In one case you likely have an electrical issue in the other a hydraulic issue.
Thanks, do you mean the stop solenoid or is there another one?I just had the same problem with a pc78us-6. The problem was the fuel pump solenoid.