HP 9865A Cassette Memory service manual?

It's also in the articles I sent you. One problem with having a reasoanble workshop is that you tend ot use it, and thus my memthods may not be generally applicable. Oh well... The original HP 'hubs' are plain, the have no flanges. The original rubber tyres were moulded onto them. I think any rings stretched over the original hubs are likely to slip off. Whether you could glue them in place I don't know. Isocyano acrullic hydro-coplymerising adhesives might be worth a shot. I did think, for making a platen roller, of making a mould and casting new tyres onto the original hub/spindle. In the case of the HP9800 card reader, you would ahve to remvoe the hubs (and you need a lathe/mill to make the puller tool to do this) and then make the mould, which agains would probalby need a lathe. So that's not a lot of good. It is, Again, the articles I sent include a step-by-step strip-down of the HP9830 tape drive, I thin kthe 9865 one is very similar. BAsically you have to rmeove the motor assembly (take off the rear bracked and the motors o nte beam just slide out. Then either fiddle the new rigns in palce, or remvoe the front panel, the circlip o nthe cassette spindle and the leaf spidng from the back of the drive wheel, and slide the spindle out. It takes longer to describe than to do. I hope you find soem interesting information in there. -tony