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  1. #1
    kck
    kck is offline

    Join Date
    Aug 2003
    Posts
    3

    Default John Deere 4040 RPMs fluctuate any ideas?

    I have a JD 4040 in good overall condition, but when under a PTO load it will not maintain optimal RPMs. I changed the air filters, but that didn't help. We are pulling a hay cutter and 15ft mower in light conditions. Any suggestions?

  2. #2

    Join Date
    Jun 2002
    Posts
    873
    Location
    N Central Ohio
    Tractor
    NH TC35D/SUPER H&M/F-20/JD B&D/FORDSON/JD250 SSL

    Default Re: John Deere 4040 RPMs fluctuate any ideas?

    Change the fuel filters first then if it doesn't improve it may need the injector pump rebuilt.

  3. #3
    kck
    kck is offline

    Join Date
    Aug 2003
    Posts
    3

    Default Re: John Deere 4040 RPMs fluctuate any ideas?

    Thanks for the info. I will try changing the fuel filters and see if that helps.

  4. #4
    art
    art is online now
    Super Member
    Join Date
    Apr 2000
    Posts
    6,130
    Location
    central New York
    Tractor
    all makes and models

    Default Re: John Deere 4040 RPMs fluctuate any ideas?

    Make sure that you have a good flow when changing the filter. For the age of the tractor you might have some stuff in the tank clogging the outlet. Otherwise it would be back to the pump.

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