Genset troubleshooting question November 07, 2012, 02:27:45 pm Yahoo Message Number: 134908Recently the Micro Quiet 4000 genset on my '02 30' has started making a lifter tick or tappet noise (clicking, clacking) when it runs. Yesterday I went to storage to give it its monthly exercise and I thought I'd try the prime function (since we just discussed it), and I could hear the pump or something priming. I then started the genset and it ran for a few minutes and quit. I checked the blinking code and it communicated Engine Stop Fault 36 (engine stopped without command by controller). I tried to start the genset 20 minutes later and it fired up fine and I ran it for about 30 minutes with the A/C on and it did not shut off - and the clicking, clacking noise persisted. I think perhaps I could have initially flooded it by using the prime function (which I've never used before). Any thoughts on what could be causing this noise? Oil level is where it should be and the LD has 1/2 tank of gas. No surging happening - it runs steadily.Chris
Re: Genset troubleshooting question Reply #1 – November 07, 2012, 02:50:26 pm Yahoo Message Number: 134909Re: Clicking sound. Chris, according to Ken at Cummins Engines in Albq. the clicking is a sound indicative of the fuel pump starting to go out. It happened to mine years ago also. After replacing it I had no more trouble. Take care, john leach, Larkspur, Co.__Switch to: Text-Only, Daily Digest • Unsubscribe • Terms of Use • Send us Feedback .[Non-text portions of this message have been removed]
Re: Genset troubleshooting question Reply #2 – November 07, 2012, 03:42:23 pm Yahoo Message Number: 134912Jim is right in saying that it could be a fuel pump problem. But given the rig's vintage (2002), the first thing to suspect is the notorious cracked fuel-line problem, which causes the generator to intermittently suck air. That clattering noise is symptomatic of a fuel pump that's running dry. Check the Techsnoz yahoo group for more information on this problem, which was very common in rigs like yours and mine. (I had the same thing last year.)Andy Baird http://www.andybaird.com/travels/
Re: Genset troubleshooting question Reply #3 – November 07, 2012, 06:30:16 pm Yahoo Message Number: 134919Quote Jim is right in saying that it could be a fuel pump problem. But given the rig's vintage (2002), the first thing to suspect is the notorious cracked fuel-line problem, which causes the generator to intermittently suck air. That clattering noise is symptomatic of a fuel pump that's running dry. Check the Techsnoz yahoo group for more information on this problem, which was very common in rigs like yours and mine. (I had the same thing last year.)Andy Baird http://www.andybaird.com/travels/ Thanks, Andy and John, for your comments. Fortunately there is a Cummins Onan service center here in the Denver are where I can have this checked out.Chris
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