[Heathkit] SB-300 receiver repair

[tymekeepz at aol.com]

I am restoring a Heath SB-300 receiver and have found that the tuning dial 
hits a mechanical stop at 350 KHz instead of covering the rated 500KHz 
segment of the selected band.
The part number for the LMO on the schematic is 110-13 but my LMO is a 
110-32.
Could someone tell me the models that the 110-32 is designed for and if 
the 350 KHz range can be expanded?
I might also be interested in purchasing a 110-13 if the 110-32 can not 
be modified.
Thank you, Bob