Installing a lock handle, also known as a doorknob, involves a series of steps from removing the old one to securing the new one in place. Here's a comprehensive guide:
1. Remove the Existing Doorknob and Lock
- Loosen Set Screws: Locate the set screws (usually on the interior knob) and loosen them with a screwdriver or Allen wrench.
- Remove Knobs: Pull off both the interior and exterior doorknobs.
- Remove Latch Plate: Unscrew and remove the screws holding the latch plate on the edge of the door.
- Remove Latch Assembly: Slide the old latch assembly out of the door.
2. Measure the Hole
- Backset: Measure the distance from the edge of the door to the center of the bore hole. This measurement (the backset) is crucial for choosing the correct replacement. Common backsets are 2 3/8 inches or 2 3/4 inches.
- Door Thickness: Measure the thickness of the door to ensure the lock you choose fits properly.
3. Choose a Replacement Carefully
- Consider Backset and Door Thickness: Select a new doorknob set that matches the backset and door thickness measurements you took.
- Style and Function: Choose a style and function (e.g., passage, privacy, entry) that suits your needs. Passage knobs don't lock, privacy knobs lock from the inside, and entry knobs require a key.
4. Install the New Latch Plate and Latch
- Insert Latch: Slide the new latch assembly into the hole on the edge of the door. Ensure it's oriented correctly (the angled side should face the direction the door closes).
- Secure with Screws: Attach the new latch plate to the door edge using the provided screws.
5. Thread the Spindle Through the Latch
- Insert Spindle: Insert the spindle (the rod that connects the two knobs) through the latch mechanism. Ensure it engages properly with the latch.
6. Line up the Second Knob
- Attach Exterior Knob: Position the exterior knob on the outside of the door, aligning the spindle with the receiver in the knob.
- Attach Interior Knob: Place the interior knob on the inside of the door, carefully lining it up with the spindle.
7. Tighten Into Place
- Secure with Screws/Set Screws: Use the provided screws to attach the knobs to the door. Tighten the set screws (if present) on the interior knob to secure it to the spindle. Avoid over-tightening.
- Test the Functionality: Open and close the door several times, testing the latch and locking mechanism to ensure they work smoothly.
8. Install the Deadbolt If Needed
- If applicable: If you are also installing a deadbolt (separate from the doorknob), follow the manufacturer's instructions for deadbolt installation. This usually involves drilling additional holes and securing the deadbolt cylinder and strike plate.
