QUOTE(tsunade @ Feb 11 2018, 11:42 PM)
commented for exactly shown in pic. a new unit in good condition usually does not require lubricating. faulty unit perhaps? or bad installation as pointed out by bro Slimey? or key faulty? or are you using badly duplicated key?the new lock installed fits the old frame. i had to push it with a bit of force on the last end, it's same length as old one, and the screw fits in properly. when turn it just feels harder than the old model, but nothing unnatural. so how did i installed it wrongly coz 1st time i change such lock.