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Old 06-30-2015, 11:57 PM
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DLCS DLCS is offline
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Join Date: Apr 2002
Location: Illinois
Posts: 4,377
Intermittent problem with John Deere 997

My 997 has a problem that when you start it up, sometimes it will not let you release the parking brake without the engine stalling. I've replaced the safety switch on the parking brake, the safety switched on the control levers, fuses under the hood, checked the wiring for damaged or pintched wires but found nothing wrong. It usually starts up and works fine after a few mintues. Anyone had this problem before? Sometimes it runs for several days with no problems. Any ideas?

2013 haulmark 18' trailer
2013 John Deere 52' walkbehind
2012 Gator with skid sprayer
2010 Turfco T-3000
2008 JD 997
2006 JD 647a
2004 JD 757 w/ 3 bag & Iron MCS
2002 JD 757 w/ 2 bag MCS
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Old 07-01-2015, 02:24 AM
herler herler is offline
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Join Date: Apr 2012
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Normally if I go to release the parking brake and it stalls, it's because of the transmission lever is in gear rather than neutral, or to put it another way: The lawn mower thinks it is...

Thus it could also be a loose connection or faulty transmission / neutral gear safety switch.
Not sure on the John Deere but recently I worked on a Toro and there was a switch that got 'clicked' by the gear lever when it was in neutral.
Yours being a Zero Turn, I would look into the neutral safety switches down below at each side of the control levers.
I am thinking if this switch isn't being properly activated, or a wire is loose on the connection...
The mower will think it's not in neutral even if it is, causing it to stall when you release the parking brake.

That or it thinks the blades are engaged, at some point we're going to have to become familiar with how it thinks.
What is it checking when the parking brake is released, which condition must be true (or false) for it NOT to stall...

You might have a safety switch in your seat.
If you shift your weight for a split second off your seat while trying to disengage your parking brake, that would kill the engine.

Make sure the steering sticks are all the way out when you remove the P-brake.

Here's the thread on that:

Last edited by herler; 07-01-2015 at 02:34 AM.
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