Milk shake in power trim system

[1979 Quartermasters]

Hi guys!
Took my drive(Alpha I, Gen II, do you need thhe serial number) off and discovered the trim system had water intrusion. I'm planning on re-sealing the rams but am wondering how I would flush that crap out of the system.
Also, while I have your attenntion, the drive is discolored(white) and so are the rams. I would like them to look a lot better. Black and shiny would be the goal, out of a can if possible. Any suggeestions would be helpful..... Thanks Ken

 

[Don S]

Re: Milk shake in power trim system

You will need to pull the reservoir off the trim pump to clean it, that milky stuff is a lot harder to clean out of all the little pockets in the reservoir. After putting it back together, run the pump to flush the pump out, blow lines out with compressed air and you should be good to go.

Make sure water doesn't leak down on the reservoir cap, some of them with a hole in the top will let water into the reservoir.

 

[1979 Quartermasters]

Re: Milk shake in power trim system

Thanks for your response.
Is that pretty much the only way water gets into that system is through the ram seals

 

[TilliamWe]

Re: Milk shake in power trim system

...
Is that pretty much the only way water gets into that system is through the ram seals

Yers, unless it drips right onto the the cap on the reservoir, just as Don explained above.

 

[1979 Quartermasters]

Re: Milk shake in power trim system

Hi guys;

I'm not sure whether to start a new thread or continue on this old one I started, but I'm sure someone will let me know.

I just picked up a re-seal kit, or O-ring kit #25-87400A 2 (Sierra) and want to try to repair it myself. I'm going to make a tool to get those caps off, but I was wondering if there is anything I should know before I start this. There are lots of parts in this kit. I didn't realize there was so much going on inside these things. lol.....Thanks.....

.....Ken

 

[TilliamWe]

Re: Milk shake in power trim system

You won't use all the parts. The correct tool is a spanner wrench. But a bench vise and a pipe wrench can work, if the rams aren't corroded bad. Good luck!

 

[1979 Quartermasters]

Re: Milk shake in power trim system

Good to know, Thanks....

.....Ken

 

[1979 Quartermasters]

Re: Milk shake in power trim system

Well I got the spanner made and removed the end cap on the ram. I have taken it appart as far as I can. The picture is everything in the order I will be replacing. The instructions say to soak everything in solvent and dry. Would mineral spirits work or should I go and get some solvent.

In the center of that picture is the tool I made for removing the end cap.....



.....Ken

 

[Pete104]

Re: Milk shake in power trim system

You can clean everything with mineral spirits but dry it off & assemble with 10w30/40 oil.

Did find what was leaking?

 

[1979 Quartermasters]

Re: Milk shake in power trim system

I couldn't see exactly what was leaking, it wasn't obvious, but the seal in the end cap looked pretty dry. What would be evidence of leaking? I haven't taken the other one apart yet.....

.....Ken

 

[Pete104]

Re: Milk shake in power trim system

At this point I wouldn't take it apart.
As Don said, you are probably getting water in the system thru the cap. If there was bad seal, #1 you would have seen "milky oil" at the end cap befor you even put a wrench to it. #2 those seals don't fail unless the scraper ring is missing or severely damaged.
Do what you have to get the pump in your hands. Mark hoses & wires. Clean out the resevoir & under the valve body. Put it back together with fresh oil. While your doing all this, think about relocating the pump or covering it somehow.

 

[1979 Quartermasters]

Re: Milk shake in power trim system

I can't see how the water got in through the cap because the boat is always stored inside, have not been caught in any rain and there is no water in or around the pump area. That was why I thought it might be the seals. I have the seal kits already and I'm doing one, might as well do the other. I will take the pump and res. out and clean every thing. Is it possible those seals would suck water in but not let oil out? I never saw any oil in the water behind the boat and the trim always held the drive were ever I put it.....

.....Ken

 

[Pete104]

Re: Milk shake in power trim system

Yea, no turnin' back now!

Good luck.

 

[1979 Quartermasters]

Re: Milk shake in power trim system

I was looking at diagrams in service manual #14 and I couldn't find anything that refered to a "valve body". Does anybody have a picture or diagram of where this might be located.....

.....Ken

 

[1979 Quartermasters]

Re: Milk shake in power trim system

Well I took the second one appart and discoverd scoring on the rod. Its very subtle, but I can feel it with my fingers. Does that mean that rod is no good?.....

.....Ken

 

[Pete104]

Re: Milk shake in power trim system

The valve body, aka adapter, is the first thing you see when you remove the resevoir. A casted piece with 2 screens fastened to it.
The scored rod is probably where the water is getting in.
You can try to polish it out. Like 1500 grit or more paper wet with oil. You don't want to make the rod much smaller than it is. And of course you can't buy just the rod!

 

[1979 Quartermasters]

Re: Milk shake in power trim system

Well I've gotten the trim pump out and in the process of cleaning it. Can I blow out those in and out the hoses are threaded into and also do I need to change those filters highlighted by the arrows? Can I clean that whole area with solvent cause it has a oily/watery film on everthing?.....



.....Ken

 

[Pete104]

Re: Milk shake in power trim system

You can (screens) but not necessary. Just shoot'em with brake cleaner or carb cleaner.
You won't get anything into the adapter except clean oil. The motor has to turn for the valves, balls & springs to move inside of it. Parts of this can be disassembled but don't!
If you can make up a hose to connect the high & low pressure sides, run clean oil thru it that way. Kind of like bench testing. Run up for a few seconds then down for a few. Do that a half dozen times & you'll be good to go. Don't forget you still have contaminated oil in the gray & black hoses. Blow those out while the trim cylinder hoses are still connect & clean them too.

 

[1979 Quartermasters]

Re: Milk shake in power trim system

Can I take those screens off without damaging them?.....


.....Ken

 

[Pete104]

Re: Milk shake in power trim system

Take an adjustable (cresent like wrench) & get loosely on top of the screen and tap it off. Before you do that, make you have something to push them back on. A 12 point socket will work. Just try not to disturb the screen.