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Garden Tractors Discussion Forum

John Deere GT275 electric clutch

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Jerry Kirkpatrick

07-02-2009 17:21:45

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My daughter has a John Deere GT275 that has been stored in a barn for several years. We got it started and it runs fine except that the mower blades won't turn. It seems to have an electric clutch and I'm guessing it's activated by a yellow knob on the dash. We don't have an operator manual or parts manual, so we're just guessing. Anyone have any experience with this same problem? I'm going to put a meter to the switch, but that's all I know to do at this point.

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Dave in SV

07-03-2009 05:45:20

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 Re: John Deere GT275 electric clutch in reply to Jerry Kirkpatrick, 07-02-2009 17:21:45  
The other thing you might try, if you are comfortable with doing so, is to temporarily "hotwire" voltage to the clutch itself to see if it energizes. Unplug the clutch and supply it with battery voltage and a ground. The results of that will tell you whether to swim UPstream, or DOWNstream.

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Dave in SV

07-03-2009 05:40:12

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 Re: John Deere GT275 electric clutch in reply to Jerry Kirkpatrick, 07-02-2009 17:21:45  
If your GT275 is anything like some other JD lawn tractors, the seat switch must be depressed (someone sitting on the seat), and the brake pedal must NOT be depressed. I have been troubleshooting a JD325 lately, and found that the circuit that powers the electric clutch is fused (on the 325 the PC board containing the fuse(s) is under the dash on the right side of the battery, accessible by removing the side panel). The seat switch and brake pedal switch both affect logic (a relay) on the PC board, which in turn allows voltage to be applied to the clutch switch on the dash if conditions are right. In the case of the 325 I have been troubleshooting, all switches are OK, but I get no voltage to the clutch switch on the dash... so the PC board is bad.

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Jerry Kirkpatrick

07-03-2009 06:19:45

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 Re: John Deere GT275 electric clutch in reply to Dave in SV, 07-03-2009 05:40:12  

Thanks for all the good tips. I'll work through all that and let you know how it goes.

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