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John Deere 185 Hydro stops when PTO is engaged


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#1 JBRamsey OFFLINE  

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Posted January 02, 2015 - 07:00 PM

I spent most of the day working on my neighbors 185 Hydro. It had been sitting over three years. Oil and filter change, plug, fresh gas, new battery, bypassed the seat switch and cleaned a bunch of terminals and connections and it starts, runs and drives well.

The problem is when I engage the electric PTO, it kills the engine. I know this model has several safety interlocks(seat, brake, PTO and shifter position?) that all work together. The PTO does engage for a second before it kills the engine.

More news. Why was the mower idle for so long? The bolts for the axle pivot came out and the steer axle rolled. I stood the mower on end, lowered the mowing deck, pulled the PTO, straightened the crossmember and reinstalled the axle.

After that, I got it fired up, warmed up and changed the oil, then it was finished.

Could I have messed something up when I pulled the PTO?

Do I have a bad connection somewhere?

The PTO switch seems overly complicated--it must have 8 or 10 wires coming out of it.

What do I need to check next?

In case it matters, it's an 86 model, Kawasaki engine and it hasn't been monkeyed with except what I did today.

Thanks

#2 KC9KAS OFFLINE  

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Posted January 02, 2015 - 07:50 PM

Sounds like a safety switch problem, or the wiring connected to the safety switch(s).

 

Do you have a multi-meter and know how to use it?


Edited by KC9KAS, January 02, 2015 - 07:50 PM.

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#3 NUTNDUN OFFLINE  

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Posted January 02, 2015 - 07:57 PM

Does the seat safety switch on the JD 185 only have an affect with the PTO or will it shut off the engine even with the PTO disengaged? How did you bypass the seat safety switch? <-- this is where I think the issue might be.


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#4 JBRamsey OFFLINE  

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Posted January 02, 2015 - 08:10 PM

Thanks for the replies. Yes, I have a multimeter and know how to use it.

To bypass the seat switch, I disconnected it and jumpered the two wires together.

It's my understanding the seat switch and PTO switch are independent of each other, but I'm not willing to bet money on it.

I couldn't get the starter to engage until I bypassed the seat switch.

#5 JBRamsey OFFLINE  

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Posted January 02, 2015 - 08:12 PM

Are the safety switches normally open or closed?




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