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  1. #1
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    Default JD 997Z mower problem

    since this is a JD forum, maybe you guys could help with my JD 997 Z mower. I have had an intermittent problem since day one...6/08. The safty feature will not allow the mower to start without park break on...fine. However, sometimes, after I start it (break on) then go to put the break down/off...the engine stalls. I took it to the dealer and they said they could not make this happen. I just did my spring tune and I had this issue one out of five fine starts.

    Any advise or information that would help in talking to my dealer?

    Thanks

  2. #2
    Platinum Member Henri88's Avatar
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    2008 JD 2305

    Default Re: JD 997Z mower problem

    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.
    Henri

    How could you be told I was french?

    Rotary cutter 4' Howse , mid mount mower 54'' , f.e. loader 200CX , tiller RT1150 Frontier , cultivator PC1001 Frontier , middle buster PM1001 Frontier , JD 47'' front snowblower , pallet forks , grass-sweeper , quick hitch Speeco , trailer hitch , cab Jodale-Perry , trailer 16' galvanized Easy-Hauler ,

  3. #3

    Default Re: JD 997Z mower problem

    I agree with Henri. Are you a smaller guy and your mechanic is not? Your seat switch is most likely the culprit. Lift the seat up and make sure the sensor is in the correct seated position and is not loose. If it is and you continue to have a problem, I'd get a new seat switch. Only other thing I could think of is crud in the connectors. Clean the connectors on the seat switch as well as the row of relays right under the hood behind the seat.

  4. #4
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    Default Re: JD 997Z mower problem

    thanks guys. I purchased a new switch today and took off the seat but could not find where it goes. I see it on line, but all I saw was a wire that went directly into the seat cushion and I did not want to mess with that. So, cleaned the plugs and reset the added seat suspension option to less suspension...put back together and it's working for now so we'll see.

    I'm much lighter than my service guy, and I'm hoping it was the added seat suspension option. I had it set to give the most flex. Now it does not give when I sit on it.

  5. #5
    Gold Member newt92's Avatar
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    Dec 2007
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    Secor Illinois
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    John Deere 2520 and 2305

    Default Re: JD 997Z mower problem

    Quote Originally Posted by 9973720wb19 View Post
    since this is a JD forum, maybe you guys could help with my JD 997 Z mower. I have had an intermittent problem since day one...6/08. The safty feature will not allow the mower to start without park break on...fine. However, sometimes, after I start it (break on) then go to put the break down/off...the engine stalls. I took it to the dealer and they said they could not make this happen. I just did my spring tune and I had this issue one out of five fine starts.

    Any advise or information that would help in talking to my dealer?

    Thanks
    Make sure the steering sticks are all the way out when you remove the P-brake.
    2007 JD 2305, 2008 JD 2520 w/200cx loader, Harbor Freight quick hitch, homemade pallet forks, 5' KK tiller, 5' KKxb disc, 4' landpride pulverizer, Frontier RB1072 blade, homemade 5 1/2' lawn roller at 3500lbs, 2005 John Deere 797 w/60" deck, 2009 John Deere 997 w/ 72" deck, 2005 JD HPX Gator w/power dump, 1998 Toro 455D 10.5' deck!

  6. #6
    New Member
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    May 2014
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    Oxford, OH
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    997Z

    Default Re: JD 997Z mower problem

    I have a 997Z with the same issue. My mower worked for three years with no issues. One day it started acting up when I would release the brake. I bypassed the seat safety switch to see if that is the problem. Same thing. I let it set all last winter and this spring it worked perfectly for about five startups. Back to doing the same thing. I can't find a problem anywhere.

  7. #7
    New Member
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    May 2014
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    Elkton. MD
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    John Deere

    Default Re: JD 997Z mower problem

    I would check the safety switches that are behind the seat. Also could be a problem with the seat detecting the weight of the person on it. Check the wires under the seat to make sure they have proper connection and aren't damaged.

  8. #8
    New Member
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    Oxford, OH
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    997Z

    Default Re: JD 997Z mower problem

    Quote Originally Posted by Bheal View Post
    I would check the safety switches that are behind the seat. Also could be a problem with the seat detecting the weight of the person on it. Check the wires under the seat to make sure they have proper connection and aren't damaged.
    I think I may be onto something. I checked all of that switch issue a hundred times before giving up. I adjusted the linkage to the hydraulic drive unit from the control arms. I noticed that the mower was trying to creep forward when the brake was released and the control arms in the stop position. While adjusting the rods, the mower kept shutting off. Once I got the wheels to stop and the linkage arms tightened properly, the mower seemed to be working as it should. I won't know for sure until it sets for a few hours. Thanks for the input.

  9. #9
    Gold Member
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    Default Re: JD 997Z mower problem

    Quote Originally Posted by Tlday View Post
    I think I may be onto something. I checked all of that switch issue a hundred times before giving up. I adjusted the linkage to the hydraulic drive unit from the control arms. I noticed that the mower was trying to creep forward when the brake was released and the control arms in the stop position. While adjusting the rods, the mower kept shutting off. Once I got the wheels to stop and the linkage arms tightened properly, the mower seemed to be working as it should. I won't know for sure until it sets for a few hours. Thanks for the input.
    hello from the OP here - i like this approach - replacing the safety switch does not help - ask me how i know.

  10. #10
    New Member
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    Oxford, OH
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    997Z

    Default Re: JD 997Z mower problem

    Quote Originally Posted by 9973720wb19 View Post
    hello from the OP here - i like this approach - replacing the safety switch does not help - ask me how i know.
    Well, I let it set for a couple of hours and tried it again. I'm still getting the same problem. However, it appears that it is better than it was. I have noticed that sometimes turning the ignition to off briefly and then turning it back on will coax it to keep running. Whatever the problem is, it is causing me to really hate this mower.

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