Actually you don't want to put it in boiling water. You'll want to see if it open before the water boils. Throwing a 160 or 180 degree stat into 212 degree water has a 32 degree error possibility. Put it in water turn on stove read water temp with cooking thermometer when it opens. If it...
You'll need a roller chain breaker (tool to open the chain and remove link(s) and a connecting link to put it back together. You'll have to determine the size of your chain. Go to Surpluscenter.com they have the tools items 14-1037 $15.00 or 14-1037-2 $27.95 (larger chains) and the connecting...
You lock it to get traction if you're stuck. As the name suggests both wheels on the axle are locked together. One will not turn faster or slower than the other. For going straight only. If you make a turn the truck will hop as the differential is not functioning to allow one wheel to turn...