HM Hydraulics--again

Can someone help me understand these old systems a little better?

I've been reading here many times, and from a lot of pretty sharp guys, about that left rearward facing hydraulic port as being a "delayed port", so that the rear gangs of the cultivator would lift a bit later than the front gangs as you came to the end of the field.

Okay, just how was this accomplished hydraulically? How did it work? What made that port delay?

And secondly, I've never heard of a cultivator that had a separate cylinder just for the rear gangs.

All the old cultivators I was ever around used two cylinders; one for each side. These cylinders were mounted in such a way that they pushed forward from the rear axle against a lift tube on each side that lifted each front gang of the cultivator independently.

The front gangs, then in turn, lifted the rear gang mechanically using a spring-collar arrangement at these same lift tubes.

The position & adjustment of these spring-loaded collars at the left and right lift arms controlled the rear “delay”.

This is how IH’s 2 row wide corn/potato cultivators and the 6 row narrow beet/bean cultivators worked anyway. 6 row bean cutters worked in the same fashion.

Can someone shed some light on this for me? What cultivators used 3 cylinders? Was it that old, airplane like, front-mounted 4 row wide outfit?

Thanks for your help,

Allan

JG

Thanks for offering to scan but you don't need to do that. I'll sure take your word for it.

I think I still have a couple of those check valves down at the farm setting on a window sill of the garage where they have been since the day those old tractors were delivered new.

All they were was a spring loaded ball/seat affiar setting inside of a machined 2" long coupler looking thingy.

The point I was trying to make was that the 'delayed' hydraulics was not at the tractor at all; and that the rear facing port is just another take off point for full hydraulic flow.

But I don't know, as I haven't ever used that rear port.

Is this how you see it and how you understand it to work?

Allan

Now, what you're describing in the window sill indeed sounds like a check valve. You don't want to plumb these into your Liftall system since the hydraulic oil must flow in both directions.

Give you give me some help?
I blew on of the rear hydraulic lift hoses and and have replaced it.

I am not mechanically smart enough to figure out how and where to insert more hydraulic fluid to to replace what I blew.

Would it be through the top plug on the front ie Pump.

Please no laughing!
The fellow at the parts store wasn't familar enough to tell me how to do it and I have never done much with hydraulics.

THANKS

Over on the right side of the tractor is a standpipe with a cap on it. Put it in there.

Allan

Bob

Yep, I agree. Never did tie to that rearward facing port.

I just thought it was an 'after-thought' thrown in by IH for some unforseen, future use. :>)

Have a good day,

Allan