Kubota l4630 Max rpm 1500

[PWCC]

Hey all, new to forums so bear with me, have 3 kubotas at my work, a l3830 l4630 gst, and l5240 hst. The 4630 has been giving me a bit of a problem lately, today it decided it did not want to rev above 1500 rpm, using foot peddle or hand lever, changed fuel filter, bled system, checked air cleaner and throttle cables with no obvious problems or solutions . Wanted to see what your take is on the issue. Thanks for all the help.

Edit: oh yeah, no bog downs or stutters at all, clean running

 

[Lil Foot]

Air filter or intake restriction?

 

[PWCC]

None found

 

[kuboman]

First you have to make sure that the throttle lever is moving full range. Does the lever hit both the low idle and high idle stops. Check that and let us know.

 

[PWCC]

Found the issue today at work, throttle lever and foot accelerator were proper, problem was main governor spring had snapped so the only spring running throttle was the small spring also attached, order new set of springs hopefully will see them tomorrow . Looks like a project to get to them as is. Pulled off oil fill port (plate and gasket) to find that said spring. Will update tomorrow with pics

 

[turck]

could be a injector pump problem, also smell the fuel to make sure it doesn't have gas in it.