Changing lock body

Does your door not open, even when you’re certain that it’s the correct key? Or have you  noticed that the door latch doesn’t fully retract or extend, even when you press the handles down?

Don’t ignore the issue  – you might have a serious problem at hand. A faulty or spoilt lock body can malfunction and cause emergency situations, when someone is trapped inside their room, or when you get stuck outside your door.

Let’s find out why this happens, when you need to change your lock body, and what you can do to minimise the chances of this happening!

Why does my lock body spoil, and when do I need to change my lock body?

1) Lock body splits open

Changing lock body

Changing lock body for a door, in an industrial building. Our customer told us that he was not able to lock and unlock the door.

Upon arrival, we found that the door latch could not retract when we tried locking and unlocking the door. The latch was extended, but being stuck in the locked position. We found this strange, for two reasons. Firstly, the lock body is relatively new. Secondly, the door is made of metal, which is a very solid door material. So we decided to remove the lock body for further examination.

What we discovered was that the bottom of the lock body had split open, as seen in panel 3. The mystery of the damaged lock body was finally solved.

We immediately changed it to a new lock body, which rectified the locking issue.

2) Lock body is constantly exposed to sun and rain

Left hand panel with a ‘before’ label at the top left corner, showing a hand holding the lock body and displaying its rusty side. Right hand panel labelled ‘After’ at the top right hand corner showing a newly replaced lock body from the side, with the owner’s keys inserted in the cylinder lock
In this image, there are two panels labelled ‘Before’ and ‘After’ at the top left hand corner. The panel labelled ‘before’ shows the original lock body, displaying its rusty face plate. In the panel labelled ‘After’, the newly replaced lock body has been fitted into the door mortise, with a key inserted into the cylinder lock.

Our customer told us that he had difficulties with his balcony door. Their key can turn in the lock, but the door cannot open.

After we opened the door, we discovered that the top latch of the lock body was faulty, and had lodged in the door frame. This was why our customer could not open the door. We removed the old lock lock immediately, changing it to a new one.

Additionally, we also realised two factors that contributed to the lock body spoiling. Firstly, as it is a balcony door, the lock body turned rusty, due to constant exposure to sun and rain. Secondly, the balcony door was drooping down, which can add pressure to the latches of the lock body and cause them to spoil faster.

After changing lock body, we advised our customer to maintain the lock body with WD40. We also advised them to seek the help of a door specialist as soon as they could, in order to keep the lock body working for as long as possible.

3) Door or gate misalignment

The following image shows three panels labelled 1,2, and 3. In panel 1, a side view of the original gate lock body in its gate mortise, with its faulty top latch, circled in yellow, is shown. In panel 2, the removed lock body is laid on its side, with an index finger indicating the spoilt latch. In panel 3, the newly replaced gate lock body is shown, already fitted into the mortise
The following image shows three panels labelled 1,2, and 3. In panel 1, a side view of the original gate lock body in its gate mortise, with its faulty top latch, circled in yellow, is shown. In panel 2, the removed lock body is laid on its side, with an index finger indicating the spoilt latch. In panel 3, the newly replaced gate lock body is shown, already fitted into the mortise.

In this case, the top latch would not retract or extend fully when the handles were pressed. This would cause the gate to get stuck sometimes. We tried serving the lock body, but the issue still persisted.

After changing lock body, we discovered that the alignment of the gate was slightly off. This misalignment can put constant pressure to the latch, causing the top latch to spoil. We decided to remove the main gate frame plate for extra allowance. The frame plate is not needed in this case, as the gate is already made of metal.

We also replace cylinder locks and office cabinet door locks, as part of our locksmith services. If you enjoyed this post, do like and follow our Youtube and Facebook pages for more useful tips and fresh updates!

For lock enquiries and appointments, we can be reached at 8812 7499.

This article was originally published on 12 March 2019, and has been updated on 25 May 2022 to reflect new information and insights that we have received from our customers.

Leave a Reply

Scroll to Top
%d bloggers like this: