BLEED - FLUSH

I Am Changing Rear Brakes On My Friends Truck. When Changing Shoes Can I Just Change The Shoes And Not The Rest Of It. And Do I Have To...

I Just Got Done Doing Brake Done Last Week And We Bleed Them And It Still Going To Floor

My Brakes Were Squishy, So I Went Ahead And Bled The Break System (did Not Realize The Car Did Not Have Bleeder Valves, Had Nuts Instead...

I Tried To Bleed The Brake With A Power Bleeder (power Built) But I Cannot Get It To Pump. What Could Be The Problem With It?