Anybody Know How to add Hydraulic Fluid?

[NEWENGLANDCHARTERS]

DO NOT USE Transmission FLUID! It will eat the "O" rings and you will be rebuiling the entire Trim/Tilt unit.

Use ONLY Hydraulic oil. It must be fresh from a airtight sealed can as the fluid is hydroscopic. ( That means it asorbs water) since the system is Sealed there should be no leakage. But most leak just a tad. maybe 1-2 cc per year. Caused mostly by temature variations and "O"ring seepage.

The best Hydraulic oil can be bought at your local airport from the Airplane Mechanics FBO. Jets use it and you can too! It is expensive. About $25 per Gallon. Still Local Automotive shops have General purpose Hyd Oil for about half that price.

There is a bleeder/vent hole on your Hyd. Resivoir. Differ places for difverent units. Find it. open it and then make a little pipe fitting with some Tygon tubing and brass fittings and a funnel available at your local hardware store. Screw the brass fitting into the fill hole and pour the fluid into the funel slowly. Raise the Hyd Ram to fully extended position. You will see air bubbles rising in the clear tubing. Do not underfill and do not overfill. when the bubbles stop, close the vent. remove your filler hose and screw in the plug.

Done.

The LOwer Gear Unit has two holes also. Fill this with 80-90 wieht Gear Oil. Remove both plugs. Drain the old oil and fill from the bottom up with the squeeze bottle or a pump. When the new oil come out of the upper hole. Plug it, remove the pump and plug the bottom hole quickly.

This should be done with the boat out of water as you will make a mess. Unless someone can design an underwater oil change rig????

NEWENGLANDCHARTERS@maine.rr.com


http://home.maine.rr.com/newengland/

 

[Tortuga James]

DO NOT USE Transmission FLUID! It will eat the "O" rings and you will be rebuiling the entire Trim/Tilt unit.





There is a bleeder/vent hole on your Hyd. Resivoir. Differ places for difverent units. Find it. open it and then make a little pipe fitting with some Tygon tubing and brass fittings and a funnel available at your local hardware store. Screw the brass fitting into the fill hole and pour the fluid into the funel slowly. Raise the Hyd Ram to fully extended position. You will see air bubbles rising in the clear tubing. Do not underfill and do not overfill. when the bubbles stop, close the vent. remove your filler hose and screw in the plug.

Done.

The LOwer Gear Unit has two holes also. Fill this with 80-90 wieht Gear Oil. Remove both plugs. Drain the old oil and fill from the bottom up with the squeeze bottle or a pump. When the new oil come out of the upper hole. Plug it, remove the pump and plug the bottom hole quickly.

This should be done with the boat out of water as you will make a mess. Unless someone can design an underwater oil change rig????

NEWENGLANDCHARTERS@maine.rr.com


http://home.maine.rr.com/newengland/

On my engine, the port on the hydraulic resevoir is the same size as on the drain ports on the lower unit. The nylon fitting on the end of the tube on one of those cheap pumps you can buy at K Mart for lower unit oil is the same. Just pull the tube off the pump and add a funnel. Or you could make it easily with brass fittings like NEWENGLANDCHARTERS suggests.

 

[cool_hardware52]

DO NOT USE Transmission FLUID! It will eat the "O" rings and you will be rebuiling the entire Trim/Tilt unit.

Use ONLY Hydraulic oil. It must be fresh from a airtight sealed can as the fluid is hydroscopic. ( That means it asorbs water) since the system is Sealed there should be no leakage. But most leak just a tad. maybe 1-2 cc per year. Caused mostly by temature variations and "O"ring seepage.

Use what the Honda Owners Manual recommends.

The best Hydraulic oil can be bought at your local airport from the Airplane Mechanics FBO. Jets use it and you can too! It is expensive. About $25 per Gallon. Still Local Automotive shops have General purpose Hyd Oil for about half that price.

Use what the Honda Owners Manual recommends. There are a variety of fluids used in aircraft hydrualics. Some are pretty unpleasent. It's never a good idea to mix unknown fluid combo's in hydrualic system. Also do everything you can to keep the fluid clean, wipe down the area around the fill hole, etc. Contaminates are really hard on hydrulaic pumps, valves etc.

Tobin

 

[Wildcard]

DO NOT USE Transmission FLUID! It will eat the "O" rings and you will be rebuiling the entire Trim/Tilt unit.

Use ONLY Hydraulic oil. It must be fresh from a airtight sealed can as the fluid is hydroscopic. ( That means it asorbs water) since the system is Sealed there should be no leakage. But most leak just a tad. maybe 1-2 cc per year. Caused mostly by temature variations and "O"ring seepage.

The best Hydraulic oil can be bought at your local airport from the Airplane Mechanics FBO. Jets use it and you can too! It is expensive. About $25 per Gallon. Still Local Automotive shops have General purpose Hyd Oil for about half that price.

There is a bleeder/vent hole on your Hyd. Resivoir. Differ places for difverent units. Find it. open it and then make a little pipe fitting with some Tygon tubing and brass fittings and a funnel available at your local hardware store. Screw the brass fitting into the fill hole and pour the fluid into the funel slowly. Raise the Hyd Ram to fully extended position. You will see air bubbles rising in the clear tubing. Do not underfill and do not overfill. when the bubbles stop, close the vent. remove your filler hose and screw in the plug.

Done.

The LOwer Gear Unit has two holes also. Fill this with 80-90 wieht Gear Oil. Remove both plugs. Drain the old oil and fill from the bottom up with the squeeze bottle or a pump. When the new oil come out of the upper hole. Plug it, remove the pump and plug the bottom hole quickly.

This should be done with the boat out of water as you will make a mess. Unless someone can design an underwater oil change rig????

NEWENGLANDCHARTERS@maine.rr.com


http://home.maine.rr.com/newengland/

Oil is NOT hygroscopic. Oil/water, polar/nonpolar? Any of this ringing a bell from high school chem?
My god, she just wantedto know how to squirt some oil in a hole. Aircraft oil, great idea there.:shakehead

 

[cool_hardware52]

Oil is NOT hygroscopic.

I think somebody is confusing oil with brake fluid. Some Brake fluids are Hydroscopic, but you are correct oil is not.


Tobin

 

[herman]

DO NOT USE Transmission FLUID! It will eat the "O" rings and you will be rebuiling the entire Trim/Tilt unit.

Use ONLY Hydraulic oil. ..............................

What the proper fluid is depends on the manufacturer. Automatic trans fluid IS a fluid that is commonly used in trim and tilt units. Johnson/Evinrude recommends GM Dextron II automatic transmission fluid, per the official J/E service manual. Use what Honda recommends which may well be ATF fluid.