hydraulic return line filter...

Mon Oct 28, 2013 10:41 am

Good morning,

About seven years ago I installed the popular bypass block between my TC and the hydraulic lines running to the pump. I connected up a "four port" valve to turn my snow blade right and left (1 spool 5gpm Eaton Cessna 30921 OC valve).

I believe the pressurized fluid from the TC is coming from the hose I have connected to the port over the smaller hydraulic line going to the pump. I believe the return line is connected to the bottom of the bypass block. My guess is that this return line is also high pressure. Everything works fine.

Here is my question, can I plug the port on the bottom of the bypass block and instead run the return line from my add-on hydraulic valve to a low pressure twist-on filter and then to a small add-on reservoir and then back into the TC via the filler opening? Or does plugging the bottom of the bypass block "dead head" the hydraulics and ruin the pump?

Thanks in advance awesome Cub brain trust!

Re: hydraulic return line filter...

Mon Oct 28, 2013 10:56 am

Neither. If I follow your description correctly, you can do what you are proposing but the Touch-Control system itself will no longer operate. That defeats the purpose of installing the bypass block in the first place.

Re: hydraulic return line filter...

Mon Oct 28, 2013 11:00 am

No. One port on the bypass block diverts pressure from the pump through your auxiliary circuit. The other returns the fluid from your auxiliary circuit into the Touch Control unit. You cannot just dump the oil back into the reservoir. If you do, the Touch Control will not function to raise and lower your plow.