air in hydraulic system – Jinma 354 Forum › Forums › Tractor Operation And Maintenance › air in hydraulic system – Jinma 354 This topic has 1 reply, 2 voices, and was last updated 6 years, 9 months ago by oldfart2. Viewing 1 reply thread Author Posts March 10, 2018 at 7:10 pm #47718 jonesgroveParticipant Offline how do you purge the air out of the hydraulic system after changing the filter and letting about a gallon of the fluid drain out. The resevoir did not drain down more than a cup or two. March 11, 2018 at 4:06 pm #47722 oldfart2Participant Offline It should purge it’s self, the top of hydraulic tank has a small hole in top of cap. Just use as normal. Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In