Rubbery Bits Gone Gooey

<Thus far he has discovered a problem with tape drives in two <terminals. His description of the problem is that, when used, the <motor capstan in the tape drive "melts". In one case he has not <been able to get all the ex-capstan goo off of the belt capstan <in the cartridge; fortunately that was a blank tape. this is also common to DEC TU58 tape system (also a dc100 cart). The solution I've used to date is to first strip the goo off the alumninum ferrule that is on the drive. Then I found a peice of tygon(vinal) clear tubing that had the required ID for a tight fit. I cut a ring the width of the original(cut squarely and clean) and proceded to glue it on using superglue (cyanoacrylic). then I run it up on a spare motor and grind it using a emery board. The last step it insure roundness. I've done this for 6 tu58 drives and it seems to work fine. It's noisier as it's harder but seems to have enough friction to drive the tape well. The material is not the best possible choice (polyurethane might be better) but I had it handy and it's easy to find. Between uses I pull the tape to avoid dents that seem to cause no problems other then making the drive very noisy. It's been in use for about a year, so the tygon hardening if needed. <And an observation: the HP 9815A desktop calculator I have sitting here <seems to use a similar drive (at least the capstan looks similar when I <peer in the slot), and I think the HP 85 does too. I'd guess. Allison