1996 130TLR trim-tilt hydraulic problem

[davehank]

Gday,
I just acquired a 1996 130TLR. The trim is working fine but the tilt not at all. Once it reaches the end of the trim cylinders travel it stops dead, the motor keeps running but it sound like it'll burn out. I've emptied it of fluid and refilled it, I'm sure the fluid level is OK. When I release it with the manual screw I can lift it up and down full travel no problem. Could it be a check valve stuck closed or something like that? Are there any hydraulic schematics somewhere on the interweb?
Thanks
Dave

[fairdeal]

The trim is working fine but the tilt not at all. Once it reaches the end of the trim cylinders travel it stops dead, the motor keeps

I happened to notice just this week,
that it is very easy to tighten the manual screw to a not-fully-closed position
where the trim goes up fine, but the tilt still bypasses...

but surely you must be making sure it is fully seated "in".

btw I'm curious how you "emptied it up fluid" ?

[davehank]

Emptied by removing the pipe that goes into the bottom of the tilt cylinder and raising and lowering it manually a few times. I guess that wouldn't get it all out, but maybe most of it. It was full of ATF, I've used Yamaha trim-tilt fluid, hope the mix is ok.

Pretty sure the manual screw was fully tight. I tried it a few times. Will double check next time.

[fairdeal]

I'm sure the fluid level is OK.

certainly there could be a check valve problem - held open by a piece of debris, say.

But are you sure you've cycled it sufficiently to work all the air out?

if you haven't, then the reservoir will appear full.

if you haven't already -

With the bypass screw fully open, you need to go full in/out, together on all rams, several times

if necessary moving the rams by hand to get full stroke

each time when fully extended, recheck that fluid level

[panasonic]

No need of buying Special "Yamaha" ATF for your T/T unit..... regular old ATF will do just fine.

[davehank]

But are you sure you've cycled it sufficiently to work all the air out?

I thought I had cycled it enough, but now I'm not so sure. Problem is I can't extend the trim cylinders by hand, so I close the bypass and use power trim to extend the trim cylinders, then hold the engine and open the bypass and lift the engine to extend the tilt cylinder. First time I did that, when I opened the reservoir plug to fill it there was pressure in the reservoir and it sprayed oil everywhere. Maybe I should have closed the bypass before unscrewing the plug? Now when I open the bypass and let the engine down the trim cylinders don't go all the way in. I've done it up down 3 times and each time there is oil coming out of the reservoir plug oil so I can't add any.

Is there another way to bleed it? I could take it off the bracket and do it on the bench if that's easier.

[davehank]

No need of buying Special "Yamaha" ATF for your T/T unit..... regular old ATF will do just fine.

Good to know, thanks

[davehank]

One more bit of information. The pipe going into the bottom of the tilt cylinder is not the original part, it's a steel flexi hose. I mention it because it seems to be real small diameter and could be restricting the flow. It's definitely not blocked, but it does seem like it wouldn't let much flow through.

[fairdeal]

Is there another way to bleed it? I could take it off the bracket and do it on the bench if that's easier.

uninstall it just to bleed it and put it back?
instead I would support the engine on that parking arm, and remove the pin from the tilt ram yoke

I've used Channellocks to pull the tilt rams out from full retracted

and I only check the fluid level, when all three rams are fully extended.

Don't know if it makes a difference - but never tested otherwise

[99yam40]

owners manual will tell you what you should use for fluid.

and I would think that running the pump will add air to the fluid(foam) and if the rams are not fully extended then itis not using all of the fluid

[fairdeal]

if the rams are not fully extended then there is not using all of the fluid

Seems Yamaha has been specifying "Dexron II" since there was a Dexron II


I've been wondering about "fully extended" and "fluid level in the reservoir" for a while -

but haven't gotten around to replacing the fill plug with a visible device


AFAIK, there is fluid above each ram as it withdraws - so wouldn't the total volume in use be the same?


when my Seastar steering cylinder goes from full port to full starboard -

the fluid passes through the helm reservoir - but for every drop that leaves one side,

a matching quantity enters the other...

[TownsendsFJR1300]

Here ya go Dave, this should help a lot, step by step:

https://www.youtube.com/watch?v=nfPyXNQQOf4

[99yam40]

Seems Yamaha has been specifying "Dexron II" since there was a Dexron II


I've been wondering about "fully extended" and "fluid level in the reservoir" for a while -

but haven't gotten around to replacing the fill plug with a visible device


AFAIK, there is fluid above each ram as it withdraws - so wouldn't the total volume in use be the same?


when my Seastar steering cylinder goes from full port to full starboard -

the fluid passes through the helm reservoir - but for every drop that leaves one side,

a matching quantity enters the other...

I have not been able to find Dexron ll in a long time on any shelves.
You would think Yamaha would change their literature to match what can be found.

any way I was getting at the comment about using ATF,
might not be OK to use something other than Dexron

But I cannot confirm that.

Did not think about fluid on both sides of the pistons
But the air/foam will be under pressure when the pump is used if it is sucking air along with fluid and shoving it into places

[99yam40]

I have to be I have more bars than anyone else

[TownsendsFJR1300]

I have to be I have more bars than anyone else

That's cause your "really nice"!

I don't get any!!