870 brakes?

[Hockeygoon]

I am looking at an 870 case coming up for auction. The owner says if you bleed the brakes they work, but if the tractor sits for a week it loses fluid and the brakes fail. This is on a 1975 diesel with a powershift. What do you think it would take to fix this correctly?

 

[VAC400]

There are cylinders and rubber hoses for this tractor. If you would like to see go to Case web site it shows the parts you will need.

 

[DKase]

Sounds like the suction seal on the hydraulic pump is bad allowing air into the system. I assume it has power brakes.

 

[Eagle Doc]

A common problem is for the sump pressure check valve to let the pressure leak down. The check valve is in the power brake valve.