Model #917254440 CRAFTSMAN Lawn, Tractor

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Question and Answers

Q:

Owners manual for tractor model #917.254440 91725440 Craftsman Sears 7 h.p. custom tractor

A:

Thank you for choosing Sears Parts Direct. I will be more than happy to help with your lawn tractor. Upon researching model 91725440; due to the age of this product we no longer have the owner’s manual and the cover available for this model this products have been discontinued.

I trust this information will help you, we appreciate your business thank for choosing Sears.

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CarlosZ -
Sears Technician
April 23, 2015
Q:

craftman gt20hp garden tractor

A:

I can understand you wanting to modify the Craftsman tractor by bypassing the low/voltage sensor to keep the tractor charged. Instead managemylife.com would rather just help you solve the issue with the batter not staying charged. Below are few links that may help while waiting for an expert answer.

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Anna T -
April 29, 2012
A:

battery is good reading 12.6 running and at full rpm the reading dont change could it be in the switch? changed regulator and stator nonchanged

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james ingram -
April 29, 2012
A:

Thank you for your question.

I am sorry you are having a problem with the tractor. I do not see where the low voltage sensor will keep the tractor from charging. If the tractor is not charging, you will need a meter to diagnose the problem. If you have a meter, turn the key on and check DC voltage from the red wire on the regulator to ground. You should have a reading of 12 volts. If you do not have this voltage, the problem is in the tractor side. If you have this voltage, start the tractor and make the same check. You should have a reading of over 12.5 volts. If you do not have this reading, the problem is in the regulator or stator. To see if the stator is putting out start the engine and check AC voltage from one of the outside wires on the regulator to ground. If you have AC voltage, the problem is likely a defective regulator.

I hope this is helpful. If you need further assistance, please reply below with more details and a model number.

Thank you for using Manage my life.

Mark T.

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Mark T -
Sears Technician
May 01, 2012
A:

no power from the regulator to ground with the key in the on position

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james ingram -
May 01, 2012
A:

If you do not have 12 volts to the regulator, you will need to check for voltage on the terminal marked B on the ignition switch. Place one lead on the B terminal and the other on the negative post on the battery. If you have 12 volts on B, move the lead to the terminal marked L. With the key on you should have 12 volts. If you do not have this reading, the ignition switch is defective. If you do have this reading, the wire between the switch and the regulator is broken.

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Mark T -
Sears Technician
May 02, 2012
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Q:

battery will not charge

A:

Due to the battery being the main source of your tractor and it not being able to charge can be very disappointing. While you are waiting for an expert to respond, I have attached some helpful links below that may provide information to assist you with your question. Have a great day!

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Alina F. -
March 08, 2012
A:

The real fun to this situation is that I cannot locate a schematic for your tractor. I've not seen one of these systems in quite some time but I believe we can get it figured out.



When the engine is running, how much voltage do you show on the battery at full throttle? Check it with a volt meter (multi-meter), not the meter on the dash of the tractor. Also, is the "discharge" light coming on when the engine is running? Does it ever go out? I ask this, because there is a sensor (127385X) on the tractor that can fail and cause the discharge light to come on. The problem with this sensor failing is that there are different ways it can fail. Usually it will show discharge and everything is actually fine. But it can also fail and cause the battery to not charge even though the alternator and regulator are fine.



Let me know a little more about the situation with the voltage at the battery when the engine is at full throttle and I'm going to continue trying to locate a schematic.



Thank you for using Manage My Life!

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XX Wade_ -
Sears Technician
March 09, 2012
A:

yes my mower havs a low voltage sensor,the battery discharge light stay on while the engine is running. with the engine running at full thortlle the multi-meter read 12 volts. what is the battery suppose to read if altinator is working? if i disconnet the positive cable the engine will cutoff. i dont know maybe the stator is not working properly.

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james ingram -
March 09, 2012
A:

Okay, I have a feeling the sensor may be causing the problem but we can check it. From the stator, there should be 2 wires going to the regulator, is this the case on your? If so, check for AC (not DC) voltage between those 2 wires. It should be somewhere around 25-35VAC at full throttle.

If you have the AC voltage then the stator is working. From there check the DC voltage out of the regulator to see what you have to ground. This is kind of a tricky thing to read because there has to be voltage from the battery present or the regulator will not "excite" and nothing will charge. If that sensor has failed you won't get the "excite" voltage sent back and nothing will charge.

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XX Wade_ -
Sears Technician
March 09, 2012
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