Hi Ray, welcome to Outdoorking. I haven't found a Colt 73113. I have found a Colt 7313 though. Here is how its cutter spindle goes together:

[Linked Image]

It looks to me as if the sleeve 8 goes over the shaft 6, a shim goes on each end of the sleeve, then the bearings go on from both ends to bear against the shims. See if the diagram matches the parts you have, and let us know.