Power Tilt/Trim 115HP Johson

[kit141]

A johnson (Model #115TLCNB Serial # J5691817) The moter will tilt all the way up but will not tilt back down. It hold the tilit up position without the travel stops engaged. While trying to figure out what was going on when I got home I noticed a leak on the fitting that goes onto center lifting cylinder this fitting has a few coils before it enters the other cylinder. I pulled the line off and noticed that it had o-rings on each end I am guessing that one is bad but I have never had oild on the floor with the motor tilted down. Do you think this is the problem I hear the motor run in both up/down. My big Question is in What position is the motor when refilling the cylinder full up or down and does the system have to bleed somehow. Thanks

 

[Joe Reeves]

Re: Power Tilt/Trim 115HP Johson

The unit is self bleeding. Fill the reservoir with the engine in the extreme tilted up position.<br /><br />If after tilting to the full up posiiton, the unit will not operate in the down mode even with the electric motor running, but after letting it sit for about 5 minutes and it then will tilt down, that is due to sticking ball check valves in the oil pump itself. When they stick, it takes a few minutes for the pressure to neutralize, after which time the unit again operates as it should.<br /><br />Is your unit acting as described above?

 

[kit141]

Re: Power Tilt/Trim 115HP Johson

No it will not tilt down no mater how long it sits.

 

[kit141]

Re: Power Tilt/Trim 115HP Johson

What it seem like is the motor is tilted to far up and something is stopping it from going down. The tilt motor sounds the same as when you try to tilt with travel stops engaged. Thanks

 

[Joe Reeves]

Re: Power Tilt/Trim 115HP Johson

Standing in back of the engine facing the PTT assy, look to the left of the port Trim ram and just slightly lower. There you will see what appears to be a large slotted screw. This is in reality a check valve.<br /><br />In back of that check valve is a shuttle valve, and another check valve which is identical to the check valve you can see. That shuttle valve travels forward and aft, depending on which tilt mode the PTT is in (up/down), opening and closing those check valves.<br /><br />If the shuttle valve jams, one of those modes becomes inoperative. This may not be your problem but it's worth looking at. The newer shuttle valves have a spring on each end, the originals did not.<br /><br />Email me and I'll send you the hydraulic diagram for it.