Colt Case Ingersoll Garden Tractors

Eugen wrote: ↑Mon Mar 20, 2023 9:38 am you guys are I'm having a ball here

Agreed
You all have me laughing out loud this morning!

thebuildist wrote: ↑Mon Mar 20, 2023 9:33 am While I'm at it, you know the newer spring design tapers down a lot at it reaches the ball. The old spring design is just a cylinder, with parallel "sides", the new design looks like a funnel, (or a tornado). Same ball size, same cavity size.

I was curious why the newer spring tapers down. Maybe it helps with squeal?

Bob

Conical or tapered springs have a variable rate of compression - my thought would be that you get a quick "pop off" followed by greater resistance as pressure against the ball and spring is increased...

Did a little more Googling on Conical Springs...

"Vibration: Resonance and vibration is reduced because conical springs have a uniform pitch and an increasing natural period of vibration (instead of a constant) as each coil bottoms."

Whew... I've learned something new for today.... Parents always said I should learn something new every day -
today's mission accomplished !

So @Harry needs to install a newer version spring. I presume they're still available.

Bob

Harry, I have a TCV sitting on my shelf that you can have if you need it. Let me know ...

Ray

I would never believe a simple post about a squeal in my hydraulic lift circuit would promote so much controversy. The 446 with the snow caster has been put away until I get time to dig into it. I moved my 646 into the shop for servicing to get it ready for summer use. No hydraulic squeal here guys, Sorry! Harry

Harry, just remember that ANY post deserves analysis.

Stop!

Well, on edit, I only read the first page and missed the other 2 when I replied. Adjust accordingly.

Do not do any of the things mentioned. Please.

You are entering a new area of knowledge. There is a Case service manual for the hydraulic system. If it is not in the files section and you cannot find it, I do have it on disk. But, I have to find the disk.

You picked the wrong time to solve your issue. The squealing is because your hydraulic oil warms very slowly in the winter and stays on the tick side of its range. The solution to that is running 0w40 synthetic oil. You already changed your oil. But, it will be well worth doing it again. I would even exercise the midlift when the drain is out to get the 15W40 all out.

There is a pressure range that is specced to your TCV. And that means there is a port that you can add a hose with a pressure gauge. The adjustment is the flat screw that is inside of the threaded outer threaded tube the size of the acorn nut which is only there to keep the dirt out of the adjustment area.