Question about John Deere 3010,3020 Tractor Basic Carburetor Repair

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John deere x320 will not syart. if one coil ground is disconnected it will start right up. if started this wsy the pto will not engaage.

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The wiring harness under the engine shroud that feeds both coils has a diode on each of the wires that connects coils.The diodes keep each coil from grounding each other out so when one diode goes bad it will only run on the cylinder with the strongest coil.Order new harness from Deere,cost less than $30.

Posted on Dec 23, 2009

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John Deere x320 PTO switch not getting power. Mower blades will not engage. Replaced PTO clutch and PTO switch. Have checked seat safety switch and RIO switch as well.


Just out of curiosity check your pigtail that plugs into the pot harness. I have ran into a broken wire inside that pigtail before.

Nov 26, 2016 | John Deere Garden

1 Answer

How to replace pto clutch on John Deere x320


Removal and replacement fairly straight forward, you just need to prevent the engine crankshaft from turning. This can done either holding the flywheel or using a piston stop. Also some clutches have a set of flats that a 1-3/8 open end wrench will fit.

When reinstalling the center bolt torque to 50-55 ft-lbs. Also make sure the anti-rotation device is engage into clutch assembly or it will rip the wires out at the first startup.

Apr 07, 2015 | John Deere Garden

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John Deere x300 series 2009 model I unhooked the kill wire and it started. But now my mower/pto will not engage is there a way to bypass the sensor?


Based on the combination problems involving the coil kill wire and the PTO activation, I would suspect the PTO switch is bad.

I do not have a schematic for the 300x, however I most of the functions are comparable to the LA 145, 165, 175.

The PTO switch is a multifunction switch. It will have 3 to 4 different functions internally. On the LA 175 it serves 3 functions. These 3 internal functions are independent of one another. Electronically they are known as single pole/single throw switches. In other words even though they are all housed inside a single unit they act light 3 separate light switches in your house.

One function ("light switch") controls your cranking system. When the key is turned to Start, power flows from the Key switch (purple wire) to the PTO switch. With the PTO switch off it flow out (purple/white) and goes to the Brake switch. If the Brake is set the power flows through to the starter solenoid and your engine cranks.

Another "light switch" inside the PTO switch controls the Blade Clutch. Power flows from the Key switch, in run position, (yellow wire) to the PTO switch. With the PTO switch on it flows out another yellow wire to the Blade Clutch. A DC volt meter should show 12 volts switching on and off as the PTO is turned on and off.

The third "light switch" completes a Ground Path. This ground path is a totally separate pathway running through the PTO switch. The ground system is fairly complex because it operates differently under different scenarios.

To produce a spark, the key switch must be in the start or run position. While starting the PTO must be off and the brake set. The seat switch does not matter at this point.

Once the engine is running the seat switch plays a part if the PTO is activated or the Brake is released. Someone must be in the seat.
The Kill system is activated
  1. When the key switch is turned off.
  2. When the operator leaves the seat without setting the brake and turning off the PTO.
  3. When the machine is reversed while the PTO is engaged and the back up switch (RIS) is not pressed.

So there are three different paths to ground; any of which can kill the engine by grounding the coil. Except for turning off the key, all other grounding functions flow through the "grounding light switch" in the PTO.

Because you have a combination problem, the Coil kill wire is grounding the engine and the Blade Clutch won't activate the blades; both of which are affected by the PTO switch, odds are you have a bad PTO.

Obviously there are too many complex functions to just bypass the switch. You will have to replace it. The part number you need is AM135131. You can do a site search to locate and order this replacement switch for about $26.00 including shipping at this site: GreenPartStore Parts for John Deere Lawn Tractors John Deere Lawn Garden...

Mar 29, 2015 | John Deere Garden

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I have a john deere 420 that the pto will not engage. I do have power at the switch


You are going to need to Google John Deere 420 wiring diagram. There is a 30 amp fuse in the PTO power circuit. This provides the power to the Time Delay Control Module which has the solenoid in it. Any chance you can here the slonoid click? There, is a safety interlock switch on the seat. And everything goes to a common ground lug that may be corroded or loose. If the PTO light comes on but dim, then start with the ground. Quite a lot in this circuit.

Dec 14, 2013 | Garden

1 Answer

I have a John Deere L-130 and the electric PTO appears to be engaged even when the switch is turned off and the wiring to the PTO is disconnected. I can start the engine (with the wiring disconnected) and...


Good diagnostic work, uncleparroth! By removing power to the PTO, you've proven that the PTO clutch has stuck/frozen mechanically. If you are mechanically inclined, you can remove the PTO clutch assembly and disassemble it. You could luck out, find something as simple as a broken spring and save a lot of money. Nothing to lose but your time. On the other hand it might not be repairable and you'll have to 'spring' (sorry for the pun) for a new PTO clutch which will cost about $200. Good luck!

Aug 08, 2010 | John Deere Garden

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Scotts 2554 mower wont start added new battery, cleaned carb and needle seat. new pto switch but still pops fuse when u pull the pto switch, put new swi=tch in and now wont even turn over at all


Does the engine turn over?. The pto switch you mentioned is this the POWER TAKE OFF switch? In other words starts the deck? If so, it must be off when starting the mower. Any internal combustion motor needs fuel and spark. If it cranks over check for a spark. If no spark determine if it has points or breakerless ignition. Also check magneto coil. If you have spark then, be sure fuel is getting to the carb. With today's gasoline, you can't let it sit in the tank long without adding an additive. If the PTO switch you described, is blowing a fuse, then it cold be a bad coil on the clutch. You can disconnect this coil to see if it stops blowing the fuse. you didn't mention if it is a Kohler or BS engine. Try this link:http://manuals.deere.com/cceomview/OMM141871_D0/Output/OMM141871_D014.html#34531

Jun 30, 2010 | John Deere Garden

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I need a john deere X360 44" front blade


you can buy it on ebay right now!
here's the link: http://cgi.ebay.com/John-Deere-44-Blade-X300-X304-X320-X324-X340-Ops-Manual_W0QQitemZ120402528023QQcmdZViewItemQQimsxZ20090406?IMSfp=TL090406151008r17840

May 10, 2009 | Garden

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