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Aq 270t hydraulic tilt

Mujibar

Mujibar

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I have been searching for a schematic of a 1970's aq270t tilt system. None of the manuals I have, seem to have a schematic or the repair instructions for the old style pump. I have not yet removed the pump system so I have no markings to give you. It is the rectangular box seen in the photos.

I need to dismantle, clean and replace any worn parts. Anyone having a schematic or info on where to find one, please share.

P.S. Yes, Ricardo, I know you told me the AQ 270T would be a PITA!
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So it looks like I will have to swim uncharted waters if no schematic/instructions are to be had. No matter I have played "shade tree mechanic" before. If worse comes to worse, I can always use a "generic" motor/pump assembly.
 
When you say "generic", are you talking about another Volvo Penta tilt/trim pump?
That may be your best bet.
The hydraulic lines can be made up to accommodate a different style pump and/or the T drive components.
 
Even a non-volvo pump, as long as it puts out enough PSI. The Question I have is can a (for instance) 280 trim/tilt pump be used more easily? I know you are correct, when you say the lines with proper ends can be built. Any decent hydraulic supply store would be able to perform that task. I am hoping that a good cleaning and minimal refurbishing of the old pump will suffice. I have worked on a lot of Vermeer, Case, and John Deere hydralic pumps when I was still gainfully employed.

However I now have the old pump and resevoir off and in the back of my PU. I will be tearing into it tomorrow A.M.
I will take pics as I proceed and will have them for reference, and also available to anyone interested in seeing the "Progress?".

As an indicator of where we are starting from. The units motor is missing. It sat exposed to the weather. The boat shop pulled it off for me today. When I turned it upside down, water drained out of it. Reminded of a movie laugh line, "Great shape for his condition, Dead you know."

So we shall see.
 
Well so much for that effort. Inside eccentric reciprocating pump cylinder/piston is broken.
Fall back position now is to use a "donor" pump.
 
Thought I would post my solution for anyone else to who may have this problem.

The donor pump became and old OMC pump and motor I found on Ebay. The hoses and fittings are a different thread size (19 per inch) and diameter. None of the hydraulic supply places seemed to have the adapters I needed. I took the adapters off of the VP pump and took them to a machine shop. They recut the adapters to the shape and thread sizes needed, installed them with new o-rings. Cost including tax. $80.00.

Happily , the assembly is now installed on the boat. The pump works perfectly. There are no leaks at the fittings. The outdrive tilts up and down, with alacrity, so the tilt cylinder seems in fine shape. The outdrive remains in the "up" position when placed there, there seems to be no leaking down.

Now then, at the bottom of the transom assembly there is what appears to be a piston type cylinder sticking out. It does not seem to move during any of the operations described above. What is it's purpose?

Footnote: My boat shop kept insisting that I not try to use a Mercury trim/tilt pump inasmuch as the fittings would not mate. In my opinion, the machine shop solution would also work with a Mercury system. Everyone seems to have used propietary hoses, fittings and thread sizes. Probably to prevent intercchangebility as much as possible. Just like the car co.s, "Dealer Item" are the cruelest words in the English language.
 
Now then at the bottom of the transom assembly is a piston type cylinder sticking out. It does not seem to move during any of the tilt operations. Seems if it would do anything at all it would be trim?? What is it's purpose?
 
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Mujibar said:
Thought I would post my solution for anyone else to who may have this problem.
Click to expand...
I hope that by 2012, when this drive model should have long since been dead and burried, that no one needs to learn your solution. :D

Seriously....... Good for you. Necessity is often the mother of invention, and it sounds like you did OK.


.
 
I sort of like "Old school" technology. If someone built it, someone can repair it. Back in my rag boater days I sailed a day sailer that was 65 years old. It was, as far as I am concerned kept in "Bristol shape." I loved that boat, but had to give it up.

Regarding the 270T:
Well, so far, so good! But that piston at the bottom, has me puzzled. Diagram I finally got hold of again, calls it a "trim piston." I thought when I first started this rebuild, I was told these drives only tilted, NO trim.

If indeed it is trim, what activates it. Where does the power for it originate. I guess I am asking, how does it get controlled? The diagram becomes very obscure as it passes thru the transom shield.

The tilt is operated by a toggle, momentary on (up)-off-momentary on(down) switch. Is trim a seperate switch?
 
Hi,I've managed to download complete repair manua land parts from the volvo or i boats, I don't rember which. The trim piston is the small one you're asking about. It works off the tilt switch. The trim is read on the gauge, the sending unit is the cable that feeds into the plastic drum in the picture. :rolleyes:Maybe I could send the manual to you somehow. Wally
Mujibar said:
View attachment 5636View attachment 5637

I have been searching for a schematic of a 1970's aq270t tilt system. None of the manuals I have, seem to have a schematic or the repair instructions for the old style pump. I have not yet removed the pump system so I have no markings to give you. It is the rectangular box seen in the photos.

I need to dismantle, clean and replace any worn parts. Anyone having a schematic or info on where to find one, please share.

P.S. Yes, Ricardo, I know you told me the AQ 270T would be a PITA!
icon11.png
Click to expand...
 
Wally, sorry for not getting back to you sooner. If the manual has a clear and full explanation and diagram of the "Trim" piston and it's operation, I am certainly interested, and am more than ready to compensate you for said manual.
 
Thank you wallys.

I have printed out the 270T tilt pages you so kindly emailed me. I am taking them to my boat shop tomorrow.

Jerry
 
Mujibar said:
Thought I would post my solution for anyone else to who may have this problem.

The donor pump became and old OMC pump and motor I found on Ebay. The hoses and fittings are a different thread size (19 per inch) and diameter.
Click to expand...


OMC stringer pumps are 3/8" pipe thread.
 
OKAY!!!! After 2 years my boat is scheduled for the water tomorrow! Just in time for my Birthday. It has been a learning experience. Made easier by the EXPERT help and knowledge of RICARDO and El-Pescador. Thank you both. Very Much!
 
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