I am going to install manual hubs, to replace the automatic hubs on
my '86 K-5 Blazer. I removed the driver's side hub with the rotor and
wheel bearings. The rotors are still in good shape but if I need to change
them in the future, how do I split the rotor from the hub?
Thanks guys!!

 

You don't have to remove the rotor to get the hub out... You don't even have to remove the wheel.

Pull the caps, remove the snap ring and pull the guts out.

 

O.K. the hubs came out easy and you are right I didn't have to pull
the wheels off. I wanted to re-pack the bearings anyways.
But what concerns me if I have to change rotors, how do I split
the rotor off the hub?

 

You have to remove the lugs. Some had thread in lugs with bolt heads on the back side. Others, you just pressed out (or installed a sacrificial lug nut and beat out). You would have to look.

 

O.K., thanks I did'nt need to change rotors now, I was just curious on how
to split the hub. The hubs were a breeze to install, I just had to remove
the snap ring on wheel bearing lock nut and install it in front of the hub.
Drove around yesterday no more chattering from the front.