Abstract: At approximately 9:30 a.m. on September 20, 2005, Employee #1, a service technician, was installing a new caster wheel assembly on the reach truck (a Caterpillar, Model Number NRR40). While holding the assembly with his right hand, he lined its stud to the mounting hole on the bottom of the truck frame. He then lowered truck using a lift jack. Employee #1's right thumb was caught in between the truck frame and the top of the caster wheel's housing. Employee #1 drove himself to a medical center. At the medical center, he received medical attention for the right distal thumb amputation, and was discharged on the same day.