Normally they;re lightly glued into position, maybe with something like double-sided sticky tape. You should be able to lift the spring-loadrd pressure arm up far enough to see it, maybe you have to dismantle the disk holder fist (this is not too hard, from what I rememmber you take off the handle and the front panel, unscrew the screws holding the pivot strip-things in place and slide it out. Be warned that if you remove the axle for the pressure arm you will have problems. There's a torsion spring in there that will jump out. I had to do this once, and to get it back, I had to make a dummy pin (1/8" diameter, long enough to fit in the prssure arm but not stick out), then fit the spring to the pressure arm and fit the dummy pin, put that back into the head carriagem, then press out the dummy with the real axle and fit the circlip. -tony