This sounds like the same issue I am having. I started another thread a week ago and checked the things on there that people recommended. I don't understand what the 50 amp breaker looks like. I have taken a video of the issue I am having and posted it on youtube. The link the to video is below.
https://youtu.be/Z-9kC6cgmkQ
Is the 50 amp breaker the black box with the wires going to it in front of the pump and behind the rocker switch in the video?
First of all, watching your video, it sounds like the hydraulic pump is bogging down and you take your finger off the switch, which interrupts power to the pump.
If it were the breaker tripping, the pump would stop while you still had your finger on the switch. The pump sounds would immediately stop. After a few seconds, it would automatically start again. So I don't think you have a problem with the breaker.
I think you have a mechanical problem with the slide mechanism or perhaps a pump problem.
The black box in front of the pump looks like the wiring distribution for the pump.
The 50 amp breaker is one of several on a buss bar near the battery. They're usually covered by a red rubber boot. I've attached some pictures. Also, take a look at our
12V Block Diagram and Diagnostic Guide for more information on the 12V breakers.