by lock2006 » 6 May 2011 1:31
Hi i found this info for Master locks 140 hope this helps.
The Master #140 is a good lock for a beginner that is looking to step up a bit from the really loosey-goosey locks out there
It features four pins and two of them are typically spools. The spools will cause a good bit of plug rotation when they false set. When this happens, lighten up tension slightly and keep pressing the pin that false-set. If you start feeling or seeing the plug rotate in the direction opposite of the tension you are applying (it will start trying to rotate counter-clockwise in this case), then you can be sure you are working on a spool pin. After pressing the pin up a bit, the plug will stop counter-rotating, keep lifting the pin. At this point the shearline is riding on the bottom ring of the spool. A tiny bit of lifting later and you'll feel it set again and get some plug rotation. At this point the plug will turn and the lock will open. If not, start checking the other pins for sets and false sets. Sometimes a single rake or two is all it takes to finish locks like these off once the security pins have
good luck figmuffin.