Dear Jeff, all loaders (wheeled or on tracks) can be configurated as forklifts.

That effort regulator you found on the dashboard transfers power between hydraulics or march (drive); your wheel loader is a hydrostatic machine: pump for drive with LS, flow and direction controls and two hidromotors for drive, mounted on a drop box.depending of travel speed these motors generate power.
That part code is not a Komat'su genuine.
In case you need a workshop Manual (pdf format), provide an e-mail adress AND the machine generation: 3, 5 or 6 (the number after the dash on the nameplate).

This is a Wheel Loader, not a forklift. So the knowledge to assist you maybe limited here.

Found the reason for failure.
What should be the length of the part UC1700877569 (PIN,PARALLEL)? In the motor N1.