Has anyone had check valve issues with the OLS holeless jack system used with HS controllers? I'm curious if anyone can verify if the system requires way oil vs aw32 oil. Getting mixed answers locally but no paperwork or bulletins to show the change. Thanks Mike

Is it an OLS (oil lift systems) brand jack? if so . call them.1-800-567-3557. if its the jacks im thinking of, then yes i have had to rebuild them.