Sure can, i have done it before.
The bearing is inside the pump, it won't come out with the seal.
Get hold of a new seal from the dealer or loader parts source. Make sure its the right one, not all generic ones hold up to the pressure correctly.
With the engine out, remove the splined coupler on the pump. Remove the bolt and use a puller, do not strike the splined adaptor, they have a taper and key fit, they can crack if you strike it. I get the puller tight then a swift whack to the puller screw usually makes it pop right off.
When its off, remove the cir clip, drill one or two small holes in the seal so you can screw in a self tapping screw. Oil will slowly leak out, but don't be too worried. Using pliers lever the seal out by holding onto the screws. When its out, tap the new seal in. The way i did it was when it was almost seated i installed the cir-clip and tapped it in. This way the seal would only go in as far as the clip did. As the seal gets to the correct point the cir-clip snaps into place. When its done, re-install the coupler and engine. Grease the U-Joints first!!!
Oh, the metal shavings from the drilled holes, they will be flushed out when you remove the seal, so its nothing to worry about.
You should be set.