L3400 not starting

[jenrow33]

Hi guys. I have a 2007 Kubota L3400 that will not start. The last few times I noticed a short delay (maybe 1 second) when I turned the key to the start position before the engine rolled over and fired. Now I turn to the start position and nothing. I tested the switch and it works correctly. I spoke with the Kubota service tech and he said there is a starter relay under the dash that could be failing. Anyone have this problem and was it the relay? Further, how difficult is it to access this relay?

Thanks for your help.

 

[teg]

So you do not hear any "click" when you turn the key on? Have you tested the battery and looked for corrosion on both ends of the cable, and that the cables are tight. (easy stuff first) Check to make sure hst pedal is in neutral and the PTO is off...

 

[jenrow33]

No click or anything. Battery is good, clutch switch is working correctly, HST pedal is good, PTO position is good. I have ordered a new starter relay. Just wondering what the odds are that this is the problem and if anyone else has had similar issue. Thanks for your help. -33

 

[jamtuc]

I have had a similar problem with mine. I even went as far as to get the dealer to come to pick it up......Now the rest of the story...or jump to thend for my fix.....The mechanic at the dealership told me to go ahead and cross out the starter with ajumper wire to start it. I did and it started fine. Now the he tells me to leave it running and they will send a truck for it because it is hydrostatic.....(they are at least 40 minutes away).....it gets better. The truck finally shows up and I pull the tractor onto the trailer and shut it down. Then just for giggles tried starting it again......it started at least 20 times with no issues. We decided they couldnt fix it if it wasnt broken so I unloaded off the trailer. A few days later the same thing happened. Crossed the starter no problems for weeks...............All that to say I finally figured out (by accident) that if hydro pedal is just a smidge out of position it will not start. So if yours is the HSD try moving the pedal fore and aft while turning the key. I have had zero problems since

Hope that works sorry for the long winded story

 

[teg]

With the key in the start position, tap the HST pedal back and forth. See if anything happens.

 

[jenrow33]

Good idea on the HST pedal. I had not played with that switch yet. I will try as soon as I get back to my shop.

 

[jenrow33]

Guess what, the HST pedal switch was out of adjustment. Looks like another convenient fix using TBN. Thanks guys. -33

 

[teg]

..the HST pedal switch was out of adjustment...

That's good to know and maybe this will help someone else, too. :thumbsup: Can you cancel the starter relay order?

 

[jenrow33]

Yes, since my problem happened on a weekend, the part wasn't actually ordered yet. Started her up again today just to make sure everything was good. Tomorrow I'll get some seat time to mow the grass. Pretty sure I'm in the clear now.

 

[firemantractor]

My L3400 will not turn over. I check all safety switches, removed and cleaned starter, battery post, and ground.
With the wife turning the key I have voltage at the starter but no voltage at the starter relay singe wire.
Jumped it over and ran it for 10 mins to blow out the winter. Shut it off and still nothing. Removed dash and cleaned all connections behind it but still nothing.

 

[firemantractor]

is one of these in the first pics the starting relay?

 

[jonyyuma]

Ok, MY L3000 Kubota , does this some and it is the Hi-, low switch on the transfer...I hold the key and find the sweet spot and it will crank..Some day I gotta lay under it an see whats up?

 

[firemantractor]

Ok, MY L3000 Kubota , does this some and it is the Hi-, low switch on the transfer...I hold the key and find the sweet spot and it will crank..Some day I gotta lay under it an see whats up?

That on mine is two micro switches. Those ohm out good and with it removed and manually pushing with key on you hear a click near the fuel site glass on the right side of the motor and when you push in the micro switches manually you have a slight clicking behind the dash so I assume its ok?

 

[jonyyuma]

Okay, don't know about my being able to hear the click? I usually have my muffs on as my hearing is going bad quickly.? I will try to see about the relay, Mine is a 2007 also, so I am paying attention..

 

[teg]

My L3400 will not turn over...

What does it do? absolutely nothing or is there a click? What does the battery read?

 

[firemantractor]

What does it do? absolutely nothing or is there a click? What does the battery read?

pulled the battery from my car and put in it (optima yellow top) so battery is good. There is no clicking other than the first click when you turn the key on.
Im not getting power to the starter solenoid for some reason. All fuses look and ohm out fine. Main fuses near battery look and ohm out too. used compressed air and blew out every connection and even added an extra ground.

runs fine once jumped at starter but will not turn over on its own.

im trying to find out where the solenoid gets its power and to trace it back to battery but have not found a service or wiring manual.

 

[k0ua]

pulled the battery from my car and put in it (optima yellow top) so battery is good. There is no clicking other than the first click when you turn the key on.
Im not getting power to the starter solenoid for some reason. All fuses look and ohm out fine. Main fuses near battery look and ohm out too. used compressed air and blew out every connection and even added an extra ground.

runs fine once jumped at starter but will not turn over on its own.

im trying to find out where the solenoid gets its power and to trace it back to battery but have not found a service or wiring manual.

Go here at messics and fill out the little online form for the L3400 and the electrical diagram.. they will email it to you pronto.

Kubota Parts for Tractors and Equipment

James K0UA

 

[teg]

Not much help... I'll look in the WSM.

So you check all the safety switches:
Clutch,
Seat,
PTO,
Is there one for "Neutral" for gear like yours (or HST petal for others)

 

[Chilly807]

The gear version of the L3400 doesn't have a clutch switch, just a micro-switch on the range select lever. If you can jump the terminal and it starts then the starter is fine, if there's no power going to the starter solenoid then it's likely the starter relay.

I just checked mine, if any of the microswitches are not made you won't get the "click" from the fuel solenoid. For example, PTO engaged, no click. Range lever not in neutral, no click. Seat switch has no effect on starting, you can start mine from the ground, in the seat, or with the seat flipped up. However, the range lever has to be in neutral, which I think bypasses the seat switch.

The left most relay in your first picture is the starter relay. The picture I attached is not clear as a print, but they do indicate the left relay as being the starter relay. Where the "c" trails away in the text should read "check for continuity between terminal 1 and 3".

The following is the testing procedure according to Kubota WSM

1. Open the panel board and remove the starter relay.
2. Apply battery voltage between terminal 2 and 4, and check for
continuity between terminal 1 and 3.
3. If 0 ohm is not indicated, renew the starter relay.

Working back from that, one wire going to either pin 2 or 4 should be hot when the switch is turned to start with all safety switches made, the other should go to ground. If you have no power to the relay, it might be either the switch or the wiring between the two components. One wire going to either pin 1 or 3 should be hot all the time the key is on to provide a source for the starter solenoid, unless the safety system removes power before that point. I'd think it would interrupt power to the trigger side of the relay, not the main supply to it.

Sean

 

[firemantractor]

Wow, a bunch or great info! Thanks guys.

I did however find the issue when I got back home. The relay was good but wire broke inside of plug.

Its all back together and working great, well that is I now have to adjust the micro switches from where i removed them earlier as one dont quite make the contact. I kinda like it that way so no one can run off with the tractor!!


Relay is marked, and wire marked that was corroded and broken inside.