How To Care For Locks

Every Master Lock is ruggedly built for long life and trouble-free service. With minimal care, your Master Lock will provide security and smooth operation for many years to come.

Here are a few tips that will help you keep your lock working efficiently:

  1. Lubricate your locks periodically with a light machine oil. Do not use graphite in any form! Your Master Lock is a precision instrument, and graphite may actually cause the locking mechanism to stick. Apply oil in both the keyway and shackle openings.
  2. Locks used outdoors may require occasional cleaning. To do this, submerse them overnight in kerosene — let them dry thoroughly — and apply oil.
  3. When a lock is operated infrequently or exposed to severe weather conditions, internal working parts may become tight. In these cases, exert a slight downward pressure on the shackle while the key is being turned. Doing this 3 or 4 times will relieve any tension and will usually restore easy and normal operation of the lock.