How long does your glow plug stay on?

[dsgsr]

With my John Deere, the glow plug stays on as long as you push in the key. Unfortunately My Kubota only stays on for 5 or 6 seconds when you turn the key to the on position, so in cold weather I turn the key on and when the glow plug light goes out I turn the key off and then on again and the glow plug will illuminate again and that will usually be enough for a good start in cold. This could be done as many times as needed the colder it is.

David

 

[crazyal]

FYI This is an over 2 year old thread.

 

[creekbend]

On mine the glow plugs stay on as long as you hold the key in the glow plug position, just before you engage the starter.

The same with my Kubota L4400.

 

[rScotty]

With my John Deere, the glow plug stays on as long as you push in the key. Unfortunately My Kubota only stays on for 5 or 6 seconds when you turn the key to the on position, so in cold weather I turn the key on and when the glow plug light goes out I turn the key off and then on again and the glow plug will illuminate again and that will usually be enough for a good start in cold. This could be done as many times as needed the colder it is.
David

I still haven't traced the glow plug logic on the Kubota M59. So I don't know if the glow plug indicator on the dash actually means that the glow plugs are activated. In cool weather (40 to about 70 F) the indicator light on the M59 dash stays on about 5 or 6 seconds when the key is turned to the on position. Any warmer than that and it doesn't come on at all. The way I do it, is not to crank it up until the light goes out....but whether the delay counts for anything or not is an unknown to me. When the temperature falls below about 30 I always plug in the block heater before starting it anyway so that's all different.

Just went through our Ford F-series diesel pickups - replacing glow plug relays as needed - and what I learned about Ford's automatic glow plug circuit surprised me. On the Fords, when you turn the key to "on", a glowing warning light on the dash says not to start the engine until the light goes out - which turns out to be about 10 or 15 seconds depending on temperature. I had always assumed that when the light went out that meant that the glow plugs did too. But not so. The plugs stay powered up for more than another minute....and without any way to tell if they are on or off. At least on the Ford, recycling the key position while the plugs are on doesn't have any effect on the glow plug circuit or cycle. It might be telling the computer something, though.
rScotty

 

[PineRidge]

Don't know about yours but on the New Holland the timing for the glow plugs is initiated each time the ignition key is turned on. I have never timed it but it seems like maybe 10 seconds or so. In warmer weather I just go to the start position without using the glow plugs.

Some years back I had an import and the glow plugs were used manually with a certain position of the key. You could keep them on as long as you wanted before starting.

It might be a good idea to call your local dealer and ask them if yours sounds like yours is working correctly.

 

[art]

I've seen diesels that take 30 seconds and some up to a minute when cold depending on design as well as vintage. Some have temperature setting the time on more advanced systems and some don't. Yours is more automatic then some but yet on the newer tractors they also check the temp to see if they are needed at all. Naturally for most things the less you use them the longer they should live.