Thread: Need For Residual Valve?

Tweet

It's good to have one in the system whenever the master cylinder is located below the level of the wheel cylinders/calipers. Improves the brake response.

A 2 lb residual valve is used when you are using disc brakes on the front and drums on the rear. You use a 10 lb valve for drums all way round.

2 lbs keeps the shoes in close proximity to the drum surface for a good pedal. Otherwise, the shoes back off and it takes a lot of pedal to get rear brakes every time you stop.

Originally Posted by techinspector1

2 lbs keeps the shoes in close proximity to the drum surface for a good pedal. Otherwise, the shoes back off and it takes a lot of pedal to get rear brakes every time you stop.

Don't you mean 10 pounds for drums, 2 for discs???

If you have drums all the way around and a drum brake master cylinder(single or double), you do not need separate residual pressure valves as they are usually in an all drum master cylinder. Where you have a disc drum master, you will need them

Originally Posted by paul274854

Don't you mean 10 pounds for drums, 2 for discs???

Yes, thank you. Got caught up in the 2 lb part of it....