clueless 3,295 #1 Posted August 31 Did the mid '70s C-120 hydro have the release valve hydro, it has the manual lift. Share this post Link to post Share on other sites
ebinmaine 73,664 #2 Posted August 31 Yes. AFAIK all the Sundstrand had the tow valve 1 Share this post Link to post Share on other sites
pfrederi 18,810 #3 Posted August 31 Location changed over time but they all have one 2 Share this post Link to post Share on other sites
