hydraulic return line filter...

Farmall Cub Forum -- Questions and answers to all of your Cub related issues.

Moderator: Team Cub

Forum rules
Notice: For sale and wanted posts are not allowed in this forum. Please use our free classifieds or one of our site sponsors for your tractor and parts needs.
rick 48 cub
10+ Years
10+ Years
Posts: 342
Joined: Sun Dec 12, 2004 9:29 pm
Location: st. paul, mn

hydraulic return line filter...

Postby rick 48 cub » 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!
Rick 1948 cub

Jim Becker
Team Cub
Team Cub
Posts: 13459
Joined: Sun Feb 02, 2003 2:59 pm
Zip Code: 55319
Circle of Safety: Y
Location: MN

Re: hydraulic return line filter...

Postby Jim Becker » 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.

User avatar
ricky racer
10+ Years
10+ Years
Posts: 4241
Joined: Wed Sep 12, 2007 8:40 pm
Zip Code: 49120
Circle of Safety: Y
Location: Niles / Buchanan, Michigan

Re: hydraulic return line filter...

Postby ricky racer » 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.
1929 Farmall Regular
1935 John Deere B
1937 John Deere A
1941 John Deere H
1952 John Deere B
1953 Farmall Cub

  • Similar Topics
    Last post

Return to “Farmall Cub”

Who is online

Users browsing this forum: Glen, newtattoobob and 4 guests