Question about Craftsman 42 in. Deck 19.5hp Lawn Tractor

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Electric blade switch when engaged does not operate blades

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  • rjnmartinez Apr 26, 2010

    thanks found problem fuse

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Does it do anything when you hit the switch?? Make noise,? spin? Tractors now days have a bunch of safety switches on them that prevent the mower from spinning if all isn't right. You have a switch under your seat, you have to be in the seat for it to work, the clutch might have to be in, the brake may have to be on, lastly, the belt may be off. Just because it is an electric switch, it is still belt driven. Check it out.

Posted on Apr 24, 2010

Testimonial: "have done all still does not operate"

  • Ned  White
    Ned White Apr 26, 2010

    OK then, you have a couple fuses near the battery, they are always corroded from the battery fumes. Check them out and check out the connections as well. Mine has the electric switch, but I never had a problem with it. If you can't get it going, I'll go out there and dig up the next thing to try. Hope this helps.

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Posted on Jan 02, 2017

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SOURCE: blades will not engage when you pull up on the button

When you pull switch to turn on blades do you here a click sound ? If so clutch is most likely ok,did you check your belt to make sure its ok ?Seat switch is just a saftey feature it cuts all power to the clutch so thats why blades turn off,thats why I asked you if you here a click when pulling switch that will tell you if there is power to switch.there is also most likely a fuse in the line that goes from the clutch switch to clutch.

Posted on May 12, 2009

  • 4 Answers

SOURCE: dies when blades are engaged

Is this on the grass, grass may be too long stopping blades from moving.

Posted on May 18, 2009

wadembly
  • 462 Answers

SOURCE: Craftsman riding mower blades will not engage

maybe the safty switch under seat might be starting to go out if that switch doesn't work the blades wont come on at all for safety

Posted on Jun 28, 2009

  • 143 Answers

SOURCE: When I engage the blades the eletric clutch kills

Check the grassbox switch, it might be faulty

Posted on Jul 04, 2009

mickey813
  • 472 Answers

SOURCE: John Deere 160 riding mower. When I try to engage

CK THE SEAT SWICH OR THE BRAKE SWICH ONE OFEM IS BAD

Posted on Oct 02, 2009

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If you are sitting on the tractor seat and the engine stalls when engaging the PTO mover blades I would check the switch under the seat.

This seat has a saftey switch to assure that the operator is in a safe location before engaging the the blades. Also if the blades are engaged and the operator leaves the seat the blades will stop. If a young rider with insufficient weight the blades will not engage.



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On the 170 there is an electrical clutch that enables the blades to engage. This of course is an important safety feature.

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Sounds like the switch is defective and must be replaced..in the meantime...locate the wire connecting to the electric clutch fro the bad switch, shut the mower off and disconnect the wire from the clutch..you can operate the mower when not using the blades....just remember make sure you shut it down before attempting to pull the wire off the clutch..this is only a Temporary fix...good luck..

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What causes fuse to blow every time I try to engage blades?


To engage the blades is it a knob to an electric switch that you pull?
If so does the wire from the switch activate a electric clutch?
Is the wire damaged and shorted to the frame, is the clutch shorted. If you provide the brand name and model number I might be able to find a schematic for your mower.

Video shows an electric clutch but yours may be different but this should give you an idea of where to look. Riding Mower Electric PTO Clutch Won Engage When Hot Problem Fix

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I believe this one has an electric clutch. Check to see that the switch is operating properly, that the wiring is good to the clutch, and that the clutch is good. Use a volt meter to check that there is voltage to the clutch when the switch is operated.

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1 Answer

Safety switch located


Micro switches will just stop the engine if the blades are engaged and the operator leaves the seat, or will stop the engine cranking if the blades are engaged, it will not stop the blades from engaging.

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1 Answer

Leplease explainon the safety switchs on mtd models660-679 work? I beleave my model is an intek twin. thank you


Hi,

The safety switch beneath the seat is only one part of the several interconnecting safety features of the modern riding mower. If the system works properly, you must be seated for the mower deck to operate. The tractor will continue running with the Power Take Off disengaged if the parking brake is set before the operator leaves the seat.The seat switch consists of two electrical contacts normally separated by an air gap. A spring creates an open space between the two contacts. Mounted between two plates, the switch's spring compresses under the weight of the person sitting in the operator seat and completes an electrical circuit. With the switch closed the tractor's ignition system can be switched on with the ignition key. If the operator stands, the spring forces the gap open and interrupts the electrical ignition circuit. The safety circuit allows the riding mower motor to continue running if the PTO is not engaged. When the parking brake is set a second switch in electrical parallel with the OPS closes. This bypasses the safety switch under the seat. If the operator stands, the parking brake switch still completes the ignition circuit.The mower blade turns only when the PTO engages. If the operator should leave the seat with the blade turning and under power, injuries could result. The mower blade would even continue spinning at full power if the machine overturned. To prevent this type of accident, engaging the PTO deactivates a connection in the original circuit and completes a second circuit in series with the OPS switch.

If the operator leaves the seat with the PTO engaged, the ignition interrupts and the machine stops. Until the PTO is off, no combination of settings will restart the mower.

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1 Answer

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If you look at the motor pulley area, there should be two different pulleys with a PTO clutch between them. The PTO clutch has wires going to it, because it is operated electrically by the blade engage switch.
It sounds like you could have accidentally put the mower deck belt onto the main drive pulley (which turns all the time) rather than the pulley that is farther out from the engine, which only turns when the engage the blade switch. If so, just loosen the mower belt and move it to the right pulley.
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1 Answer

Have a cub zero turn 52 inch cut the blades wont engage it starts but when you pull the switch to turn on the blades it wont engage any help?


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