1. Lock heart Do not rain. Flush, because there is a small spring rust failure is not flexible

2.Motorcycle keys, a long list of series together, locomotive when running, keys shaking the added weight will wear locks heart for a long time the key will slide out

3.Key bad inserted or withdrawn, spray some light lubricant (w40) can not be too thick oil will not activities

4.Some lock heart can not refuel the (very few) such as picture-beads lock heart

5.Locks bad switch, spray lubricants oblique tongue

6.Automatically lock (three sections., Sec. Segments) to have a slight gap can not be too tight, easily broken locks (such as unlocking is required in order to open the door by hand)

7.Door can not be too large, easily brushed aside and shaking sound

8.Plaid type of security doors, anti with wire inserted into the hook to open automatically lock the ramp lock pull the door opened o

9.Do not directly with key opened the door, the key switch to open the door lock, lock heart did not directly pull the key to open the door back into place, the lock did not tell you how long it will protest say goodbye