Adapted from HP Service Sheet “D” WB0SMX
8640b Gear Set Replacement
A9 Reassembly
16. Reassemble A9 Assembly by reversing steps 6 through 15 above, while
observing the following points:
a. If the shaft index assemblies (47 and 50) were removed, mount them
with the index tab pointing to the top of the switch. Mount the hollow
shaft on the right side. When assembly is complete, check to be sure
the shafts do not bind against the P.C. boards. If the shafts bind, loosen
mounting screws (48) to adjust.
Gearset Replacement Steps:
Install the new brass combo gear and spur gear.
Install the new brass combo gear and planet gears onto the T-Shaft by
removing the retainer clips from the planet gears replacing the gears and
reinstalling the retainer clips.
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