1. Thank you for visiting HeavyEquipmentForums.com! Our objective is to provide industry professionals a place to gather to exchange questions, answers and ideas. We welcome you to register using the "Register" icon at the top of the page. We'd appreciate any help you can offer in spreading the word of our new site. The more members that join, the bigger resource for all to enjoy. Thank you!
  2. ALL NEW MEMBERS READ THIS FIRST!! Thank you for joining Heavy Equipment Forums! If you are new to forums we communicate with "Threads", please search our threads to see if your topic may have already been answered and if not then click "Post New Thread" in the appropriate forum. This will allow all of our members to see your question and give you the best chance to be answered. After you've made a number of posts you will graduate to Full Member status where you'll see a few more privileges. Following these guidelines will help make this the best resource for heavy equipment on the net. Thanks for joining us and I hope you enjoy your stay!!

D9G 66A Transmission pressure

Discussion in 'Dozers' started by Frankhaddad, Jun 8, 2020.

  1. Frankhaddad

    Frankhaddad Well-Known Member

    Joined:
    Aug 25, 2017
    Messages:
    60
    Location:
    Maine
    Out of the blue, tranny goes to neutral, Has gotten worse over the past year. This morning I checked pressures for the customer, I checked it at the filter directly after the pump, ran great for 20 minutes then noticed my gauge fall to zero and it neutralized. It does this then can come right back or come back in an hour. thought it might be something in the control valve but wanted to see if someone else had experienced this before. I don't want to take it apart for nothing.
     
  2. stars&bars44

    stars&bars44 Well-Known Member

    Joined:
    Jun 3, 2015
    Messages:
    136
    Occupation:
    Earthmoving
    Location:
    Trinity NC
    Had a D7F doing that. It had pieces of o-ring in the valves.