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D9G 66A Transmission pressure

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

  1. Frankhaddad

    Frankhaddad Well-Known Member

    Aug 25, 2017
    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

    Jun 3, 2015
    Trinity NC
    Had a D7F doing that. It had pieces of o-ring in the valves.