Question about John Deere 22HP VTwin 48" Riding Mower

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L130 mower shuts down when getting off seat with parking break set and PTO disengaged. I know it's safety lock circuit problem, but I don't know how it's wired

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You can bypass the seat switch and see if the switch itself is bad, I do not know on a JD but on a Cub Cadet the RMC controls the safety switches, which is a small black box with a connect plugged into it. Hope this helped Tim

Posted on May 21, 2011

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The tractor has a neutral safety switch ,be sure you are in neutral or park , be sure pto is disengaged has a safety switch on pto . Has a operator present switch under seat cushion that is activated when setting in the seat. All these work together to complete circuit to engage starter. Check it out

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While I was cutting grass the Engine shut down. Pulled the brake up. Push the PTO back down to shut the blades down. I started the engine, engine runs perfect.


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Can malfunction of PTO or other safety switches prevent start up of mower


You didn't state the model or brand of tractor, but usually the way the cranking circuit work is, from the "S" terminal of the ignition switch, the circuit runs to the PTO switch, if it's in the OFF position, the circuit then runs to the pedal switch, if it's in the DOWN (or brake on) position it then runs to the solenoid. On other tractors, from the ignition switch, the circuit runs to the pedal switch first. (The seat switch isn't used in the cranking circuit).

Any switch can go bad, but I would more likely suspect the pedal switch or loose connection at either switch. (But it could actually be the PTO switch).

Try tracing the circuit from the "S" terminal of the ignition switch through the PTO or pedal switches to the starter solenoid. You may get lucky and find something obvious.

If you find nothing, try jumping across the pedal or the PTO switch (only two terminals are used in the cranking circuit, trace back to ignition switch for the incoming, outgoing is usually directly adjacent). Jumpering will take these out of the circuit and tell you if either is bad internally.

Lastly, there's always the possibility that the ignition switch is bad. (Doesn't happen all that often, but it's suspect as well). Jumper from "B" terminal to "S" terminal will take it out of the circuit.

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Husqvarna 17530 stalls when engaging the blade. Seems to run fine else wise/


Does engaging the pedal for the PTO lug the engine down, or does it just die like turning off the key?
If it lugs the engine down, then you need to make sure you can spin the spindle and idler pulleys by pulling the belt by hand. You should be able to slip it around the engine pulley enough with the blade pedal disengaged. Pull the belt up tight so the slack is around the engine pulley and try to spin the blade spindle and idler pulleys.
If it dies like turning off the key, then its likely a safety switch and may require a meter to test which.

The seat switch is has a shunt in the circuit that must be satisfied in order for the rest of the circuit to be happy. Make sure the connections are good, the pins inside the amp connectors will sometimes spread, push out of the lock etc. and if connection is lost will not work. Otherwise a new seat switch will be needed. You might check the PTO switch for continuity, without a diagram or schematic I am not sure how your circuit is wired. you have to have the parking brake engaged to get off the mower while the engine is running and the PTO is Dis-engaged?
I don't know if your "go" pedal eliminated this switch or not. But if with the parking brake engaged and the PTO disengaged, you lift off the seat and it dies, then its the seat switch.

Hope this helped Tim

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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

When turning the ignition switch on my LT 1000 craftsman tractor, it doesnt do anything. I have replaced the battery fuse and the ignition switch and nothing happens. The lights doesnt come on either. It...


You may either need a seat switch,pto switch or a park break switch.If the tracter is in nuetral with the park break set,it should start with out anyone on the seat,eliminating the seat switch.If you on the seat and the park brake is pushed and it wont start make sure the pto is off,if it is and nothing happens,then it's likely the parkbrake switch.Also check the connections on the battery,starter and engine block[ground].Let me know how you make out.

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1 Answer

Cub lt1045 while mowing pto keeps shutting off


I found that the safety switch under my seat was the problem for me. If I had to lean when going near hedges or low hanging branches, my PTO would disengage. I removed the safety on the seat and no problems since.

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Park brake switch ,pto switch and seat switch will all shut down the machine,pto and park will also keep it from starting,so start at the seat.

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