there is a bolt in the center of the wheel / bearing, remove the bolt and the wheel comes off. there is a plastic bushing in the bearing (in 2 halves) tap out the bushing halves, when you look down the bolt hole you can see where the halves come together, catch the edge with a punch and tap the bushing out. On 1 side of the wheel you will see a snap ring, remove the snap ring and tap the bearing out with a hammer
well maybe I explained the procedure for a free standing wheel, if there are 2 wheels within a few inches of each other between the slide rails, the wheels are on a common shaft that is bolted to each side of the slide rail, you need to pull the bolts from both sides and remove the entire shaft.
with the shaft on the bench there will be a spacer tube, a washer, the wheel, another washer, the center spacer tube, a washer, the other wheel, another washer and the last spacer tube.
Once you have the wheel in your hand, the plastic bushings are the same as explained the first time
yes there are two within a few inches of each other. I will pull both bolts off and try and wiggle it out. It looked like the front shock was attached to that bar but it was hard to see the first time I looked at it so ill give her another go.