Question about Black & Decker 19" Electric Lawnhog Mulching Mower with Rear Bag

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I have a B & D electric lawnower model LM110 that stopped working when it rolled over a rock. Is there a fuse that can be changed, or a reset button on this model? Thanks

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  • xj750xrider Jul 01, 2008

    I have a similar problem with a LM115 mower. My magnet was broken in one spot and the blade would not turn. I disassembled the whole electric motor and vacuumed all the little magnet pieces. The blade is spinning now, but I can't remember how the wires were connected to the rectifier. A diagram or picture would help.

  • Anonymous Jul 03, 2008

    Me too.

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Unplug the mower. checked the blade & try to spin by hand the blade. if it not spinning then the magnetic ring is probably broken. if ok open the top housing that held by two screw.inspect if the armature are ok still/not broken.
there is no fuse in the unit. it uses rectifier from ac to 120 dc volts.

Posted on Jun 25, 2008

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F525. Updated mower switch by John Deere is not engaging mower


The John Deere F525, a front cutting machine, has 3 fuses.
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Check the 15 amp fuse. I believe this supports the PTO clutch. If you replace the fuse and it blows again, check the electric clutch. You will likely find burnt or melted wires. The bearings do go out on these clutches causing them to run hot and eventually burn up.

PTO Clutch will not engage: There is a very fine one page discussion on evaluating electric clutches at this site:

http://www.messicks.com/Articles/FixingElectricClutch.aspx

My JD tech manual, which covers the entire LA 100 series, agrees with the electrical specifications. It states that the Electric PTO Clutch should show the following:

Resistance 3.7 ohms
Current Draw 3.25 amps
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It does include a note to check the PTO Clutch Key for damage or if missing. So there is a drive key between the PTO Clutch and the shaft. Additionally, it recommends checking the tightness of the cap screw. That's the screw or bolt that holds the clutch on the shaft.
Cap Screw torque 55 lb-ft (75 N.m).

If the fuse blows, I recommend you check the resistance of the clutch. If the clutch is shorting to ground it will show zero resistance when you ohms the connector wire to a ground position. In which case, you will have to replace the clutch.

Fixing Electric Clutches

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On the F525 there is a cut-off switch in the hydraulic system. It is a low pressure cut off. If you were running the mower and deck and then it suddenly stopped, it may be low pressure in the hydraulics. It will not automatically reset as you are using the same volume for the drive pumps. Once the oil gets low enough it cuts out the deck drive 1st, then the drive pumps.

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Hope this helped
Pete
<ohpedro@hotmail.com>

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sounds as though you are on the right track
but be sure to check the wiring directly from the electric clutch on the front of the motor back to the switch
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give as the model so we can help.

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