I just replaced the master cylinder/pushrod/shock on my boat trailer (drum brakes single axle). Bleeding went without a problem, but after putting the cap on the master cylinder and having the bleeders closed I can't seem to push the pushrod in using a 4' 2x6. I can get the actuator to move a little bit, but that just results in the pushrod spring compressing and the outer shaft of the pushrod moving away from the nut. With the cap off or a bleeder open I can push it all the way in as expected. Any thoughts on what's wrong would be appreciated. Thanks!
