|Re: 9100A: mag card reader drive wheel replacement|
Message #7 Posted by David Smith on 11 Mar 2002, 6:19 p.m.,
in response to message #1 by Dave Brown (NZ)
The replacement drive wheel that I have used is from the "Projector Recorder Belt Company". It is their part number ST1.014. They are 0.75 inch inside diameter, 1.014 inch outside diameter, .140 inches wide, square profile. They also have a ST1.016 that I suspect would work just as well if your supplier is out of stock on the ST1.014
The HP drive wheel has a 0.40 inch tangetial cut taken out of the bottom edge to provide clearance for the card to be inserted.
On my 9100A there was no need for any complicated pullers, etc. to access the drive wheel.
1) Just take out the one screw that holds the motor.
2) Take out the two screws than retain the drive shaft bushings. Remove the bushings.
3) Note the orientation of the switch cam. The drive shaft may or may not have a flat side for the cam set screw. Mine did. Remove the cam that operates the microswitches (it has a set screw).
4) Lift out the motor/shaft/roller assembly. If you can find it, mark where the flat side of the drive roller was so that you can install the new drive roller in the same place. I suspect that you may not need the flat cut to the edge of the drive wheel. It makes inserting the card easier. Scrape off the old roller.
5) Glue the new one roller in. I use IC2000 Tire Cement. It is a rubbery superglue used by radio control car people to glue their tires on. I suspect that RTV silicone adhesive would work very well also.
6) Reverse the steps to put it all back together again.