here is a link to the video

so I got the pads for the brakes and these brakes are different then iv ever seen. no bolts? or did someone rig this thing. don't know if its normal

1999 ford e450 dully rear brake
I just got it from a guy , said he did the front brakes but needs the back brakes does. I was wondering why he would take it to a shop and not do the rear also.

here is the link on youtube.

 

Welcome to the site..

Those are the caliper retaining pins..

Take a decent size pin punch, round rod, or even a long bolt long enough to pass almost all/almost all the way through,, and place it at the point end, meaning where the pin halves come together or 'gap'. The pins have a slight tab or lip that keeps them from moving/walking out, as does the rubber expansion or 'tension' of the pins core holds them tight. Strike the caliper pin at a slight angle ( both halves at the same time to compress) towards the pin center helps to slip the lip/tab on through. When driving them out, drive or punch on the metal ends evenly and not a small punch or tool on the pins rubber core alone. You can just knock them through, the force will compress the tabs to the core, and if their dried, or coming apart, damaged, should be replaced. Their reusable, as long as the rubber is healthy, and the tabs are still good once removed, meaning their not damaged and still will catch the caliper and mounting.

To install, just a hammer and drive them in until the leading or nose end protrudes and the tabs expand. Center the pins after install.

 

While you are there , give some thought to the parking brakes , if you use them.
You will need to remove the axles and bearings to remove the rotors. The parking brake shoes are under the rotor and it may be a PIA to inspect one , but if all is OK,no need to get any further involved. If you don't use the parking brakes and the cables get corroded, the first time you apply them they may not release. It is not difficult to work on them, but if you are not familiar with them ,best to leave it to someone who is.

 

Agreed with you !!

 

I believe Ford used that system on the front disc brakes up until around 1992 then went to the circular caliper pins with rubber boots to help keep the calipers free to move.
If you are going to only replace the pads , make sure to open the bleeder screws when squeezing the caliper piston in so the dirty fluid goes out and not back into the brake system. Also, the surface (upper & lower) the caliper and pads ride on accumulate a rust coating and if not removed will contribute to preventing the caliper from being free to move. Don't apply any lube to those surfaces since it will only attract dirt and grit and create problems.
Hayapower gave you good instructions and if you follow them You should be OK.