RK05 Help

Well, as Tony surmised, the blower motor itself was bad. The odd part is that there were two RK05's in the system, and both of the blower motors were toast. I'm wondering if there was something environmental about the storage (dry, insulated/sheetrocked garage, but no heat) that did something to the motors that caused them to die in both drives. I took the blower motor manufacturer, and seemed much more robust. I now have one drive that will work. I'm hoping that I can, with the procedure Tony mentioned for tearing the motors down, perhaps cobble together another motor, or perhaps take the motor to a motor repair place and see if the windings can be repaired. It's interesting that in order to remove the blower motor, you have to destroy the foam seal that seals the motor to the electronics bay, in order to get to the fourth allen head cap screw that secures the motor to the drive base. I have to improvise and make my own new foam filter I put the good motor back in the drive. The 2nd drive, as it turns out, also had the upper head crashed at some point in time, it has a lot of oxide on it, and shows signs of getting hot, so to get that 2nd drive running (once the blower motor issue is resolved), I'll have to replace the top head. My question now is, do the heads have to be replaced in sets, or can one head be replaced? Once a head is replaced, does the drive have to be aligned in any way? I've read the head replacement procedure, and it suggests it, but I don't have an RK05 alignment pack, which pretty much precludes doing that. Is there a chance that just replacing the head, being careful to make sure it is properly seated and that the torque on the holddown set screws is correct, that the drive will "just work"? I have a good set of heads from the 'scrap' drive. By the way, an RK05 drive will indeed load the heads, go READY and give "ON CYL" status with no controller connected, so long as the terminator is installed in the last slot of the electronics backplane in the drive, and a good cartridge is installed. Now that I have one drive that seems healthy, the next step is to figure out what is going on with the RK8E...it seems that one bit in all reads Rick Bensene The Old Calculator Web Museum http://oldcalculatormuseum.com