1450, no hydro after low fluid.....

[wsar10]

Hello all,
Let me start off by declaring my ignorance involving IHCC hydro units, I have zero experience with these and almost just as much knowledge about them.

My neighbor has a 1450 that will not move in forward or reverse, the hydro lift is dead aswell. This leads me to believe the pump is shot......

His son ran it low in fluid, One day he was mowing and when he went to park it all just quit....no noise or anything out of the ordinary just quietly quit.....

We pulled the seat pan and fenders to investigate.

We know this:
-Fluid is at correct level and clean.
-The linkage all moves as it should.
-You can hear the pump spin inside the hydro unit when you move the lever to F or R.
-we pulled the two check (or relief) valves on top of the unit and they are clean with good seals and the ball moves as it should in both valves.
-no leaks
-We can see the input shaft spinning beyond the fan and into the unit as it should

Where do we go from here?

How can we further troubleshoot ?

Is there a common failure with this type of issue ?

Thanks in advance for any help.....

[R Bedell]

Welcome to OCC.


Did you look here......??? Hydro Info

[jimbob200521]

I've heard it mentioned before on the forum. When he ran it low on fluid, he may have sucked air into the pump. Try starting it, pushing the lever forward and pushing the machine forward a few feet at the same time. Kind of like a jump start for a hydro.

Also, you say the fluid is at the correct level and clean, but as the filter been replaced?

[jimbob200521]

Originally Posted by R Bedell

Welcome to OCC.


Did you look here......??? Hydro Info

Wowie...does that trunnion look worn in one of his pics or what?!

[wsar10]

Originally Posted by R Bedell

Welcome to OCC.


Did you look here......??? Hydro Info

Yeah, it just kinda seems like were going around in circles there.....
I cannot verify yet if the rear cover was pulled, or if the shaft stops spinning under load.

I will also try to push the machine in "gear" to force any air through the next time I get the machine in front of me.

[wsar10]

Originally Posted by jimbob200521

Wowie...does that trunnion look worn in one of his pics or what?!

I saw that, in fact when I first looked at it, the "cam washer" that holds the spring captive (not sure what its called) was rolled 180 degree and not seated properly, I cant believe the spring didn't fly out.....

But this wouldn't cause the "no go issue"...would it ?
I thought this would cause erratic speed control (if you will)

[jimbob200521]

Originally Posted by wsar10

I saw that, in fact when I first looked at it, the "cam washer" that holds the spring captive (not sure what its called) was rolled 180 degree and not seated properly, I cant believe the spring didn't fly out.....

But this wouldn't cause the "no go issue"...would it ?
I thought this would cause erratic speed control (if you will)

No, just "erratic speed control".

[Darrell]

I had two different tractors that broke the rear spirol pin and the driveshaft was still spinning , not sure how , but it wasn't spinning fast enough to build pressure to the pump.

I started to take the driveshaft out and when i took one of the rear spirol pins out it was broke in three pieces on one tractor and two pieces on the other. Replaced the pins and everything was good !!

Probably wouldn't hurt to check ALL of the pins first , including the front.

[wsar10]

Originally Posted by Darrell

I had two different tractors that broke the rear spirol pin and the driveshaft was still spinning , not sure how , but it wasn't spinning fast enough to build pressure to the pump.

I started to take the driveshaft out and when i took one of the rear spirol pins out it was broke in three pieces on one tractor and two pieces on the other. Replaced the pins and everything was good !!

Probably wouldn't hurt to check ALL of the pins first , including the front.

So your saying while its running and engaged, try to apply resistance to the shaft right at the input of the hydro unit.... ?

[sawdustdad]

With the seat and fenders off, I'd verify that the rear end of the hydro's top shaft (over the differential, sticking out the back of the hydro) is turning the same as the input shaft. The connection to the input shaft is pinned to that shaft. Sometimes it's just a sheared pin that fails to transmit power from the drive shaft into the hydro itself. Other times it's internal to the hydro. but a sudden failure like that points to a sheared pin.