Trim ram rebuild question

[RC51]

Ever since I hit a log last year with my lower unit my trim ram get's pressurized and goes up on it's own. I've read that the ram that comes with the 2.5 Offshore has some sort of memory safety release of some sort for when you hit something. Can't quite remember what this feature is called. But, some people on hear thought the problem was being caused from this feature.

Anyway, the unit is a 98' and nothing I'm doing is fixing the problem. I've drained it of all fluid. Put new fluid in it, spent a while bleeding all the air out of it and it's still acting up. I'll trim it up and when I let off the button it will still go up higher with built up pressure somehow. Then, If I trim down it does the same thing. I'll let off the button and it simply goes back up.

I'm not sure exactly why it's doing this. But, I know I need to fix it. I did a search on rebuilding the ram and it sounds real easy. Especially if you have the correct spanner wrench. Can someone let me know what the correct part # is for the rebuild kit on a 98' 20" offshore ram. If you happen to have the part # for the wrench that would be great as well.

Does anyone have any experience rebuilding these rams that could explain why this ram is doing this ever since I smacked that log last season. I would really like to know what I'm looking for when I take the sucker apart.

Any help is really appreciated,

Thanks

[RC51]

In case anyone was wondering. I took my pump apart and clean all the check valves. It all looked real good. A little sludge stuck to the bottom of the tank. But, other than that, it looked good.

I put it back together and it did the same thing. Same problem no better. I have already taken my ram apart and everthying looked like new in there. I still replaced all the O-rings. When it was apart I even took off the plunger at the bottom of the shaft to inspect all the springs. All of it looked perfect. So, I put it back together and was still having the same problem. No better.

Then I put a spare ram in and it worked perfect. I have no idea what the problem is. Since I just painted the body of the ram that isn't working I tried pulling the shaft out of the one that worked and putting it in my newly painted body. Well, it works perfect. I don't get it. All the parts look like new on the original shaft. Makes no sense. I'm even using the same return cup that goes in the body first when you assemble it.

Anyway, just thought I would share what my fix was incase someone else has this problem. FYI, this is all a result of hitting a log in the water with the bottom of my lower unit.

[JR IN JAX]

I got some air in mine once, that made it spongy/springy. I finally got it all bled out and it is rock solid.

[HighVelocity]

I think when you hit the log there must have been a change in the tolerance of the old ram (IT BENT). You may need micrometer to measure the change.

I've seen drive shaft spline (female side) look perfect and not slide over an output spline.

Hydraulics are funny man. If things aren't seated just right it may work but not for long or correctly. I have a friend who breaks everything, I learned a lot over the years just fixing his stuff. LOL