Problems changing a doorknob

it would depend on the door knob construction and what was stiff inside it.
The problem could be part of the handle or part of the lock mechanism.
For a typical indoor door lever handle, undo the screws on the face plate and take the handle off and oil as appropriate. You may have oil handles on both sides of the door.
For a rotating door knob handle there is generally a single screw on the underside of the knob
For a lock mechanism, you could just spray oil inside the mortise moving part (you wouldn't have to dismantle anything to do this!).
However to dismantle it, you'll need to remove handles on both sides of the door, remove the square bar that slots between both handles and remove the lock mechanism (you may have to remove locating screws that exist on the mortise face. If lock mechanism is user serviceable then there will be screws to undo to allow it to be dismantled. If none exist then it is probably worth buying a new one.

Hi..Please contact the vendor from you have purchase. and replace door handle set or door knobs (knocker). or you can contact to other for new buy as per your requirement. i hope this will help you..

i can help you with that...just follow this steps...
1.Remove the old doorknob by taking out the screws that hold it in. You will have to remove the striker separately by removing the screws that hold the strike plate in place on the outside edge of the door. Slide the striker out.
2.Take the new doorknob, striker, and strike plate out of the packaging and look for the directions. (Most doorknobs are installed in the same way, but there are always exceptions.)

3.Slide the striker bar into the hole. Insert the screws into the striker plate and tighten.

4.ake the two halves of the doorknob, and place the one with the male end through the hole in the striker bar. Place the female side of the doorknob on the other side of the door and make sure that it lines up with the male end. Slide the two together. Screw the knob together using the two long screws that came with the doorknob. Make sure that the screws are tight. Make sure that you have the lock facing the right direction. You want the locking mechanism on the inside of the house or room.

5.Test your work before you shut the door. Make sure that both sides of the door knob turn and the striker bar goes back and forth.

:p

Now you can put your standard screwdriver in the hole in the middle of the metal where you removed the doorknob, turn the screwdriver, and now your door will open.

Jen

Take apart a similar doorknob in your house. Use the stem with knob on it and insert into the square hole in the lock--turn!

Hello,

I will tell you how to fix 'em. Open the Door Knob with a screw driver, gently pull aart the two knobs once open, then look for a long sliding rod, pull one knob away, twist the Knob untlil it is in unlock position, put them back together to test if it slips properly. If it does not, there is something preventing the rod from rotating freely. Try to ensure it rotates freely. Then screw back together :)

If this is the lock part itself,try gradually loosening install screw enough to be able to manuver lock to work and if so slowly tighten as you test each time gradually. Please clarify problem more if need to.

youve probably solved the problem by now but i would use a spanner or molegrips on the spindle to turn it, fitting a new one would have fitting instructions included.