l 4200gts glow plug problum

[fastback88]

I have kubota l4200gstc and the glow plugs work only when they want to.
When I turn the key on somtimes they come on and will stay on until I start it , or somtimes they won't even come on, even if I turn the key on and off and back on they still won't come on. Then somtimes when I am using the tractor they will go on and off .I replaced the glowplug relay and it did not change. On my L35 kubota when I turned the key on depending on how cold it was out would determine how long the glow light woult say on the colder it was out the longer it would stay on,when it is hot out it would only come on for a couple seconds. Is this how the l4200 should work,Im thinking so since the tractors are both the same year. What eles should I try?

 

[rbargeron]

I had goofed up glow plugs on my L3600 (similar setup) There are several parts in the system - there's a timer T0070-31410 ($72) and a controller 16415-65660 ($62) These two are mounted back-to-back to the glow plug relay 16415-65600 ($26). These three pieces are mounted inside the body behind the dash panel. The coolant temperature sender on the engine could also be the problem - 16415-83040 ($23). Hope this is useful. Good luck. Dick B

 

[Kenonf]

Get the controller, it is what is bad in your system, not the timer.
Been there and done that.
Ken

 

[fastback88]

Thanks, I will order the controler