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Garden Tractors Discussion Forum

John Deere LT155 solenoid

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Sandra Bokan

11-24-2009 06:43:41
65.5.111.66



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I am having to jump off my mower in order to start it. I was told it was the solenoid switch. I need to change it and could someone please tell me where it is located? It does not say anywhere in the manual about it. I had one given to me brand new and they said it should fit it. Thank you in advance for your help!




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Vinnie Hueber

11-25-2009 16:20:29
67.249.97.139



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 Re: John Deere LT155 solenoid in reply to Sandra Bokan, 11-24-2009 06:43:41  
If you can get your hands on a voltmeter here are a couple of quick tests you can make. - Usually a chattering solenoid is the sign of a weak battery or a bad battery terminal connection.
- Make sure your battery terminal connections are clean and tight
- A good fully charged battery at rest should read 12.5 volts DC with the tractor OFF. Try recharging the battery if voltage is much lower than this.
- If the charging system is working the battery terminal voltage should rise to 13.5 - 14.0 volts DC with the engine RUNNING. If the voltage stays at 12.5 or drops lower the charging system is not working and eventually the battery will run down.
- When cranking the tractor the battery voltage should not drop below 10.5 volts DC, if it does the battery is no good.

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jd b puller

11-25-2009 14:40:06
69.134.143.90



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 Re: John Deere LT155 solenoid in reply to Sandra Bokan, 11-24-2009 06:43:41  
If your battery keeps going dead, I wonder if your stator is working (check AC voltage at full throttle), or possibly you have a bad voltage regulator.



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Kentb of SWMO

11-25-2009 05:58:55
98.20.119.94



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 Re: John Deere LT155 solenoid in reply to Sandra Bokan, 11-24-2009 06:43:41  
Take a VOLTAGE reading on the SMALL terminals on the solenoid while holding the key switch in the start mode. If you have voltage you have a bad solenoid. No voltage, you have a bad switch somewhere BUT NOT necessarily the ignition switch. It could be the switch under the clutch, the PTO switch if you have an electric PTO clutch or the interconnecting wiring.

Kent



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snuffy

11-24-2009 12:58:14
174.124.174.139



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 Re: John Deere LT155 solenoid in reply to Sandra Bokan, 11-24-2009 06:43:41  
if it starts by jumping it most likely the battery is bad



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Sandra Bokan

11-25-2009 11:19:38
65.5.111.66



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 Re: John Deere LT155 solenoid in reply to snuffy, 11-24-2009 12:58:14  
I had to purchase a new battery last year, and then the beginning of this year -- it only lasted for two months, took it back to where I got it and it was totally dead. After I got the second battery, it lasted for two more months, then I had to jump it to start it. When I turned the ignition the first time I had to jump it off, it clicked fast and then it did not make any noise. I asked the fellas here at work and they told me it was probably the solenoid. It has been dark here by the time I get off of work, so I was going to change it Saturday if it is the problem, but if it is anything much more, I will have to get the tractor co. to pick it up and take it in for service and that is totally what I do not want to do -- I need to mow now! But if it is much more, will it harm it by jumping it off to start until next spring? Thank you so very much.

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El Toro

11-26-2009 05:38:16
74.103.74.58



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 Re: John Deere LT155 solenoid in reply to Sandra Bokan, 11-25-2009 11:19:38  
You need to check the charging voltage with your volt meter set on DC volts at your battery with the engine at 1/2 throttle or better
should be around 14 volts. Charge your battery overnight with a battery charger then see if the
engine will crank and start without jump starting it. I never had very good luck with those lawn battery's. Hal



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Bob

11-24-2009 07:11:19
69.178.228.68



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 Re: John Deere LT155 solenoid in reply to Sandra Bokan, 11-24-2009 06:43:41  

Key #'s 11 and 12 are the starter relay and starter solenoid, located near the battery. The red (+) battery cable connects to the starter solenoid.

That being said, while the solenoid COULD be at fault, it's probably more likely the one of the safety switches or even the key switch or wiring could be at fault.

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usetabesteve

11-24-2009 11:50:28
168.166.54.11



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 Re: John Deere LT155 solenoid in reply to Bob, 11-24-2009 07:11:19  
Sandra, the ignition switch is as likely as anything to cause trouble on that tractor. The solenoid would be a close second. The contiuity tester would be a good tool but a multimeter would work better. You need a full twelve volts to turn the starter.

If you get buzzing, ppopping, or stuttering when you turn the key to "start" check your battery cables first.



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Sandra Bokan

11-24-2009 08:52:37
65.5.111.66



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 Re: John Deere LT155 solenoid in reply to Bob, 11-24-2009 07:11:19  
Thank you Bob for your detailed picture. I should be able to find that with no problem. I have had this mower for almost 11 years and brought it brand new. I have had no problem whatsoever with it and when talking to someone here at work they suggested that would be the problem. Would the problem show up by doing a continuity check on the switch? If it seems ok, can I check the continuity on the other parts you suggested? Thank you once again.

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El Toro

11-25-2009 18:25:56
74.103.74.58



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 Re: John Deere LT155 solenoid in reply to Sandra Bokan, 11-24-2009 08:52:37  
You should check the charging voltage across the battery terminals with the engine at 1/2 throttle or better. Should see around 14 volts.
That may be your problem if the battery is low why your solenoid isn't working. If you're only seeing 12 volts or less your charging system isn't working. Could be a bad stator or a bad voltage regulator. Hal



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