Two employees were attempting to lubricate pinion gears on an overhead crane bridge drive. To prevent overspray, the first employee held a blue shop rag behind the pinion gear being lubricated. The second employee sprayed the lubricant. The first employee asked the second to move the bridge forward using the crane pendent control, so he could lubricate the entire gear. The second employee inched the crane forward, at which time the blue shop rag and the first employee's finger got pinched between the pinion gear and the drive wheel.