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PTO Clutch keeps burning up or melting. Has good ground through harness. Not over loading when mowing. Any ideas?

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Do have the right clutch if so u might want to check into may be see if u can get bigger clutch than wat the factory offers

Posted on Sep 13, 2010

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The mower turns on fine but when i engage the pto to start mowing it doesn't work and shuts off and blows the fuse


could have bad pyo switch or pto clutch.make sure every thing turns freely,blades and pullys then unplug clutch and try to enguage if does not blow fuse check clutch with meter. put meter on ohms probe one terminal and other on ground via clutch housing should not have continuety check other terminal to ground.voltage goes in one term and out the other like litebulb if potting (insulator) in clutch is melted wire inside will short on housing.hope this helps

Aug 14, 2010 | Cub Cadet Street Sign- tractor lawn riding...

1 Answer

Electric pto will not engage the mowing deck. stopped working while mowing.


had a similar problem. The engine mount bolt that grounded the PTO black ground wire was loose- causing the pto to work erratically. To see this bolt (13mm i think) you will have to lie on your back and look under the machine. It is above the front steering arm of the right tire. If the wire is dangling you will need a new bolt. Thanks for the previous posts ;)

Aug 01, 2010 | John Deere Pto Clutch For Stx38 And Stx46...

1 Answer

My lawn tractor just quit running, battery fully charged, won't do anything when switch is turned on. Can the ignition switch be bad?


When you say it quit running, did it stop while you were mowing? Or did it just not start one day. Could be the ignition switch, but not likely. There are several safety switches on your mower. First is the operator present (switch in the seat) then there is the switch on the clutch that requires you to hold the clutch in when you start. Then there is a switch on the PTO for the deck that must be off to start. Without an exact model number, I can't look at the exact wiring schematic, but this is generally how they work. If you have a tester, and know how to use it start at the battery, look for 12 V. Then test from ground to one side of ignition swithch. Then to the other while the key is in start. Then find wires to seat switch. This switch should keep the mower from starting and keeps the pto engaged usually. then find the switch for the clutch/brake. test both sides of that. Finally test the small terminal on the starter solonoid. If you're getting 12V to the solonoid, and you have a good ground on your battery and it still won't start, could be the solonoid. If it actually quit while you were mowing, I'd check the seat switch and pto switch.

Jul 12, 2010 | Craftsman 20 hp 42 in. Deck Lawn Tractor -...

1 Answer

Cub Cadet 1861 amp light comes on when the PTO is engaged and after mowing for a short time the PTO disengages and now the 30 amp fuse blows and stops the engine


Sounds like you have a short circuit, either in the PTO clutch, or in the wiring that goes to it. Inspect the wiring for any obvious spots where insulation has rubbed off or burned. Also look at the wiring at the back of the PTO engagement switch for these signs. Before buying an expensive PTO clutch, unplug its connector. Drive around with the PTO switch on (even though the PTO won't activate and the blades won't be engaged). If the fuse doesn't blow, the problem must be within the PTO clutch. If the fuse still blows, it must be in the PTO switch or the wiring from there to the clutch. Use an ohmmeter to trace and find the short. Good luck!

Jul 09, 2010 | Oregon Scientific Electric PTO Clutch for...

1 Answer

RE: Lawn mower blades will not engage


This sounds like a faulty ground condition, the PTO clutch requires a ground provided by the chassis wiring harness to function and a ground for the ignition switch to kill fire to the coils. The other components work as they should because the voltage regulator, fuel shutoff solenoid and starting interlock system have their own grounds. The ignition switch in these mowers is a large round plastic switch not capable of grounding itself, it should have a black wire leading from the terminal marked "G" on the backside of the switch.

to diagnose a faulty ground you'll need a basic 12V test lamp:

Unplug the switch and and install a the test light clip on the positive terminal of the battery, probe the ground wire in the unplugged harness that corresponds with the "G" terminal only. If the ground is good the lamp in the test light will illuminate brightly, if poor or faulty the lamp will not light or be noticeably dim.

Further verification of a faulty ground or failed PTO switch can be tested at the PTO Clutch harness, turn the key on, engine NOT running, and pull the PTO Switch to the engage position, with the test light clipped onto the Negative Battery terminal or chassis, back probe the connected PTO clutch terminals. If the PTO switch is good and the ground is good then Only one terminal will illuminate the lamp, if both wires illuminate the lamp then the ground is faulty, if no lamp illumination then a loss of power is suspected, check the terminals on the PTO switch and Ignition switch for power.

Typical Ground termination locations are on the frame near the rear of the tractor frame, above the transmission, in the steering column area and near the solenoid, check for a loose or corroded eyelet terminal, broken wire, or a missing fastener in these areas.

Jul 04, 2010 | Craftsman Garden

1 Answer

When mowing the pto will drop out and not start back up. I changed the switch, thinking that was the easiest fix. Is there an clutch adjustment? Could I have a loose ground?


If you have a test light you can check power at the connection to see if power is present. If power is present check your ground. Not sure if safty switch could kill power to the pto, but you can test pto by connecting 12v and a grond to the plug on pto with engine off to see if clutch is drawn in. You should see it move and hear a click.

Mar 11, 2010 | Oregon Scientific Electric PTO Clutch for...

1 Answer

I have a husqvarna yth2148 and the blades have quit and then after sitting till the next day they have started working and now it quit completely and wondering if there is a way to test the pto switch by...


Testing the PTO clutch and wiring.
1) A voltmeter or test light is a MUST.
2) Starting at the clutch, there is a connector from the wiring harness.
a) one wire will have voltage, the other is a ground wire
**NOTE: a person must be in the seat, pto turned on. DO NOT start the engine, but have the key in the run position as if you were mowing.
If there is voltage in the wiring harness connector, the problem is the clutch assembly.
If NOT, then
3) check for voltage from the back of the pto switch (normally, the switch can be removed by depressing the holding tabs on it's sides, so that you can access wires easily)
a) you will have a supply wire from the ignition switch, and a wire that goes to the clutch harness. with the switch on, you should have voltage on at least 2 wires. The other wires are the seat safety/start circuit and are not part of this test.
b) If you have battery voltage coming into the switch, but nothing coming out, the switch is bad.
c) if you do not have any voltage supply, then
4) check the ignition switch, does it have a battery source voltage, and in the run position, it normally will have an 'A' terminal that supplies the pto switch
* note
5) many times the internal terminals of the igniton switch can fail to supply voltage to the pto switch
** I am assuming the supply to the ignition switch is good, because otherwise you would not be able to start the tractor..

Nov 10, 2009 | Husqvarna Lawn Tractor - 54in. Deck, 26...

2 Answers

I have a Countax K14 ride on mower the cutter deck


Hello ianh_2007:

Usually this Problem is Caused by a Blown Fuse or a Bad PTO Ground.
1-The Following is a Basic File I Made for Checking the PTO (Blade Engagement).
>>The Most Common Cause for this Problem is the PTO Ground. >>A Quick Ground Check is to Use Another Wire and Ground the PTO at the Harness Connection Nearest the PTO.
>>Be Careful and Do Not Ground the HOT Wire. Use a Multimeter and Locate the Ground Wire.
>>Clean the PTO Ground and All the Connections for the PTO Wiring Harness.
>>If you have an Ohmmeter, Disconnect the Wiring Harness from the Front of the Clutch and Check the Resistance of the Clutch. You should have around 4 or 5 OHMs. If at or near Zero, the Coil has Shorted.
2- >>The Following is a Basic File I made for Setting the PTO Clearance. Any Input is Appreciated. **Some of the Newer PTOs cannot be Adjusted.
>>If you can Get a Blade Style Feeler Gauge between the PTO Magnet and Clutch, then Set the Clearance at .015in. The Newer PTOs have the Same Set Up as the Older PTOs, except there is No Adjustments.
>>I Suggest also that you Rig a 12 Volt Light for Testing the Current Flow to the PTO while Operating the Mower. If the Light Blinks During Operation, then you have a Bad Connection somewhere to the PTO Clutch.
>>If the Light Stays Steady and the PTO Still Kicks in and Out, then it is the Adjustment.
>>You can Also Try Turning the Spring Loaded Adjuster Nuts 1/4 Turn and Operate the Mower. Do Not Adjust Over 1/2 Turn.
>>If you have Adjusted to 1/2 Turn and the Problem is Still Present and you Know the Voltage to the PTO is Steady, then Replace the PTO.**
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

May 12, 2009 | Garden

1 Answer

The blades stop and the 20 amp blowes on My YTH


Hello:

This Sounds like a Bad PTO.
The Following is a Basic File I Made for Checking the PTO (Blade Engagement). The Most Common Cause for this Problem is the PTO Ground. A Quick Ground Check is to Use Another Wire and Ground the PTO at the Harness Connection Nearest the PTO. Be Careful and Do Not Ground the HOT Wire. Use a Multimeter and Locate the Ground Wire. Clean the PTO Ground and All the Connections for the PTO Wiring Harness. If you have an Ohmmeter, Disconnect the Wiring Harness from the Front of the Clutch and Check the Resistance of the Clutch. You should have around 4 or 5 OHMs. If at or near Zero, the Coil has Shorted.
Please, Do Not Hesitate, If you Hit a Snag or this Does Not Correct the Problem, I am Here if You Require More Assistance.
Hope this Helps. Let me Know What Happens, Please. May the All Mighty Bless You and Yours. Be Safe and Be Happy. Thanks.

Good Luck

Respectfully

jbridger (John)

May 10, 2009 | Garden

2 Answers

Mower pto engages when initially started but after


the coil in the electric PTO shorts out when it expands by heat causing it to lose it's magnetic pull and disengages- I hate to say it,but you need a new PTO clutch.

May 07, 2009 | Garden

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