Help Please!

I have a 784 International Hydro. She starts, she runs but will not move! It has to be something symple to fix but hard to reach just not explained in repair manual. Any ideas?

There's something wrong with your transmission. Give us more details.

Our 584 has sometimes not gone into gear when shifted thusly..some lubricant on the shifting levers underneath the deck they are mounted on and suddenly it shifts well agin..you aren't giving us much to go on, its either not going into gear or range or the clutch is totally done,I'm thinking it is not in either high or low range or it is not shifted into gear even if the gearshift indicates it is.

Hi Jack, you said "784 HYDRO" meaning it has a HYDRO transmission, correct?

I believe Allen from NE is one of the experts on the HYDRO transmissios.

JimB

(quoted from post at 15:02:52 02/07/09) I have a 784 International Hydro. She starts, she runs but will not move! It has to be something symple to fix but hard to reach just not explained in repair manual. Any ideas?

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1) Check oil level. Check with engine idling after running for two minutes.

2) Is the range transmission in neutral? Does it shift into both high and low ranges?

3) Does the linkage going into the hydro transmission move when you move the speed control lever?

4) Does the Foot-N-Inch pedal (clutch) work properly, Is it returning to the up position?

5) Will the tractor move if you hold the speed control to side while in the forward position?

6) Will the tractor move in reverse?

Put the range lever in neutral. Move the speed lever to the forward position. Slowly and carefully move the range lever to either the high or low position. You want to check to see if you hear the gears start to clash. If you do not hear any gear clash the hydro transmission is not driving the hydro motor.

If the tractor was working fine when last used the most likely problem is a stuck high pressure relief valve. There are two high pressure relief valves, one for forward and one for reverse. These are pilot operated valves controlled by the Foot-N-Inch pedal. The valves should open at 5000 PSI to protect the hydro from being overloaded. The pressure relief setting is determined by the Foot-N-Inch pedal. As the pedal is depressed the relief pressure decreases. Any use of the Foot-N-Inch valve causes the relief valves inside the hydro unit to open. If either of these valves should stick open the tractor will not move.

The next stage in trouble shooting the problem is to cap off the two lines that go to the Foot-N-Inch valve.

WARNING: CAPPING OFF THE LINES WILL DISABLE THE Foot-N-Inch Valve. YOU WILL NO LONGER BE ABLE TO CONTROL THE MOTION OF THE TRACTOR WITH THE Foot-N-Inch PEDAL. DO THIS ONLY WITH THE REAR WHEELS OFF THE GROUD OR OUTSIDE WHERE YOU HAVE PLENTY OF ROOM.

You will need two 1/4 inch JIC flare caps. These must be steel. Do not use brass. With the caps in place there will no longer be any relief valve pressure setting and brass may burst as pressure is applied. If the tractor now works the problem is in the controls outside the hydro. If it still does not work the problem is internal to the hydro case.

Owen gives an excellent run down on how the Hydro operates and way to check it out. I would just add that as there was no mention of other hydraulics such as steering not working that they are functioning other wise the main drive at flywheel may have failed.

It's like the hydro pump is in neutral. All the auxiliary hydralics are working exactly like it should but the pump seams not to be picking up oil. It is almost like something let loose like an O ring or a line.