@nav39
Based on that serial number - this lift truck very well maybe be one of those " gray market" trucks that came from Japan. Often these units had very different engines , wiring harnesses, etc than those units originally built for the US market either produced in Japan or assembled in the US. Unit built for the US market were OSHA/ANSI, UL compliant machines and had larger HP engines.
The serial number would have a Prefix or Suffix with an A in it.
What this means for you service parts will be hard to source as service parts are primarily stock for units that were sold thru the authorized Komatsu distribution channels & dealers. The Grey market sellers were on their own to supply product support manual, technical help & parts. etc for teh units they sold. In California a big time grey market seller i nLA area was Myfran-Bowman - they sold any brand thye could get his hands on - most common units were manual trans with a two 118" mast (most common in Japan), pneumatic/air tires.