An employee was using support jacks to level a manure screener machine. While positioning the support jacks, he went to insert a pin through the holes to set the jacks in place. The holes did not line up and the pin could not be pushed through the back hole. He went to line the holes up again when the machine tilted down toward him, catching his left ringer finger that was holding the pin. The employee suffered an amputation at the distal interphalangeal joint.