trim and tilt removal

[gulfarrow20]

1996 225 OMC
Having problems with trim and tilt,
1, Jumpy on way down on tilt ram (sometimes)
2, loud dull noise when triming down on trim rams when switch is pressed for first 1-2 seconds of movement then noise stops, goes back to normal noise (this has started recently)
3, Knocking, rattling noise has started

I tried to take the whole t/t unit off the motor. The pin that holds the tilt ram on came out but could not remove the long pin from the lower of the unit, seems to be caroaded in place. I sprayed freeze and release on it with no joy. Thats when the ratteling noise started and sounds like it is coming from below the eletric motor.
So I have flushed some oil out snice I can not remove the unit for rebuild, the oil comes out very dark, looks like rubber deteriating, what I do is tilt motor up take off filler cap tilt down to trim rams, much oil comes out, fill resvior while tilting up, replace cap unit full. Now cycle up and down to fully trimed couple of times and then drain some more oil.
Is there a easy way to rermove unit.
is Dextron3 ok
dose anyone know what the knocking noise is (below motor)
are these units easy to rebuild (when removed)

Thanks for any info you have.

 

[tashasdaddy]

Re: trim and tilt removal

have you greased the rams.

 

[gulfarrow20]

Re: trim and tilt removal

Yes greased often

 

[Chris1956]

Re: trim and tilt removal

To remove the PTT unit, make sure you have removed the clips that hold the lower pin. Use a solid metal drift close to the diameter ofd the pin, and give the pin a good solid rap with a 4 pound hammer. if it still won't move, apply some heat to the aluminum engine bracket that surrounds the pin and rap it again. You need to hit the drift straight in line with the pin, so as not to peen over the pin.

 

[HighTrim]

Re: trim and tilt removal

.....and if you have mushroomed the end of the pin, you will need to file it down or it will not make it through the hole. A good penetrating oil and patience is what you need. Your pump is located beneath the motor, which may be giving you trouble. Do you have a manual for troubleshooting the hydraulic system of your TNT?

 

[gulfarrow20]

Re: trim and tilt removal

thanks for responce
the pin is auctualy frozen in the t/t unit, not mount bracket. I hit the pin so hard that I have moved the mount brackets apart. I guess its stuck good. Maby I spray with bolt off few times a day for a week then try?
don't have manual, do I need it for trim and tilt?
recently replaced foward/pinion gear without it.
thanks again.

 

[HighTrim]

Re: trim and tilt removal

I had one take me a couple days to get out. Just keep spraying it with a good penetrating oil, then hit, oil, hit, etc... Once it gets going it will get better, I promise. Be sure the end is not mushroomed as stated, filing it down will help. Here is your hydraulic setup. You may need a pressure test done to determine where your trouble is, be it a valve or what have you... A manual would be best for this, but someone on here may be able to guide you in this procedure.

"http://www.crowleymarine.com/brp_parts/diagrams/15872.cfm"

 

[rodbolt]

Re: trim and tilt removal

heat heat and more heat.
the corrosion has clamped the pin in the unit, occasionally I have to destroy the unit to make it let go.
occasionally I can remove the brackets enough so I can cut both sides of the pin and get the unit on a press.
then heat again.
the showa trim units had a notorious filure rate.
beaware that the long bolt that holds the pump to the body will most likly break.
especially without heat,when I say heat I am talking Oxy/Acetetylene,propane wont get hot enough and mapp is marginal.
BRP really doesnt offer much in the way of rebuild parts for the showa unit,but its the same basic unit that Yamaha and a few others use with different mounting holes.
look for someone in your area that has been to the yamaha drivetrain course and ask to copy his Showa trim unit section.

 

[gulfarrow20]

Re: trim and tilt removal

OK I'll keep trying with the penitrating oil first so I can save the pin If possible. cheers!

 

[gulfarrow20]

Re: trim and tilt removal

Got the unit out. Had to cut the pin.
All hex head grub screws are stuck, broke one bolt taking pump off. Can I unscrew the plugs that hold in the rams. I expect that they will be threated but are they left or right hand. I tried to remove one but it did not budge. Brushers are approx 10mm long, 6mm to the wire, keep/replace? Has not leeked any water into motor. The bearing in the top of the motor housing is loose and was letting the armature hit on magnet/s. This was the rattling noise.
So the dramma now is getting out the grub screws and the rams.
All feedback greatly appreciated, thanks.

 

[gulfarrow20]

Re: trim and tilt removal

RODBOLT
cheers buddy.
The long bolt luckley did not break, one of the short ones did though.
You got any more info on yamaha unit
Thanks

 

[Chris1956]

Re: trim and tilt removal

Gulf, I made a spanner to remove the cap on the tilt rod. I used two 6" pieces of angle iron bolted together at one end. On the other end I drilled and bolted two 1/4" bolts, one on each end, which stick out past the nuts for 3/8". These just fit the holes in the trim rod cap. It unscrewed CCW. I presume the trim rams would unscrew in the same way. You might buy a complete seal and O-ring kit and rebuild the thing. These kits are available on the web in several places(likely $50). Trim motors may be available from ARCO, purchased off the web or from a discount marine store(likely $200+).

 

[gulfarrow20]

Re: trim and tilt removal

Thanks Chris
I'll give that ago, I have propane/butane mix for heat. Not hot enough but will it help loosen?
cheers

 

[Chris1956]

Re: trim and tilt removal

Gulf, I am not sure about heat, with all those o-rings. You might smack the spanner with a four pound hammer (gently) to loosen.

 

[gulfarrow20]

Re: trim and tilt removal

Rams are removed. I made the tool, worked good, though I bent 4 5/16 bolts first on a trim ram plug, (drilled bigger holes in plugs). They were sezied tight. A nice tap of the hammer around the outside of thread did the trick. You can even hear the tap noise go hollow, then you know it is loose, could be undone by hand if the Oring was not on it.
pistons and cilinders have slight stratches but are still smooth, Pulled pump apart, gears are like new. In the pump there are 2 round metal peices with little pointy bits in the middle that are spring loaded, can these be removed? Plastic plug with ball in the middle and brass plug, can these be taken out?

Thanks.

 

[MarkV_Deep6]

Re: trim and tilt removal

Now your getting to the point where you need to have an OEM service manual. (Not Solec, or non OEM) This area is full of parts that you must be able to remove and replace o-rings and seals. Some of them you will not know exist without a good OEM manual.

Diagrams and pictures are worth there weight in gold when you need them. Trying to talk you through all these small parts etc. will only cause problems. JMHO

 

[Chris1956]

Re: trim and tilt removal

Gulf, My OMC Service manual does not cover the PTT units. They are considered an "Accessory" and are covered in an OMC Accessory Service manual.

My Outboard service manual covers how to adjust the trim limit switch, gauge sender and fill the PTT unit.

 

[gulfarrow20]

Re: trim and tilt removal

Now I have striped it down I decided to pull out the relief valve last and found a broken Oring. This is the only problem I have found. So I will put it back together and see what happens. The releif valve could have been removed with the unit on the motor/boat. Wished I did that first and could have saved a lot of work, maby. Let you know how it goes.

 

[hwkypuck]

Re: trim and tilt removal

There are no problems just solutions, greese the rams