Product Maintenance /Other/UnionME/Unionme%20Banners/Article28.jpg In general terms, locks and architectural hardware require little maintenance, but as with most mechanical devices, adjustment and lubrication will improve their operation. General Maintenance Atmospheric deposits of dust and grime are the major causes of premature deterioration of surface coatings because of the wide variety of chemical pollutants in the atmosphere. When such chemicals become damp, they often initiate local attack, generally in the form of pitting on the surface finish. Dampness can rarely be prevented but dust and grime can usually be removed by regular attention such as dusting with a dry cloth or by washing neglected surfaces with clean or soapy water. Little and often should be the rule, avoiding the use of even the mildest abrasive. The application of wax or silicone polishes can be beneficial because of the barrier layer created between surface finish and atmospheric deposits. Locks & Latches The correct operation of a lock or latch, assuming correct fitting, is often affected by movement of the door or frame occurring, perhaps, due to distortion influenced by climatic conditions or wear on hinges or pivots inducing door drop. The usual effect from these conditions is inability of the latch and deadbolts to easily engage the striking plate or keep, requiring an adjustment to their position on the frame, or an adjustment to the lip of the striking plate to provide a more favourable striking angle. Freedom of operation of the latch action in conjunction with the striking plate or keep is particularly important when the door is fitted with a closing device and also, of course, on fire resisting doors. It is also important that the holes in the frame behind striking plates are deep enough and free from foreign matter, to ensure unrestricted movement of the bolt or bolts. Lubrication, when required in the context of free latching of a door, need only be applied to the sides and striking face of a latch bolt. Pin tumbler and disc tumbler cylinders should be lubricated with a PTFE lubricant. Door Closing Devices There is little routine maintenance to be carried out on door closing devices, lubrication generally being limited to theapplication of a little light oil on visible joints, such as those on the arms of overhead patterns. The closer should be examined periodically to ensure that the door is closing correctly and that the appropriate valve adjustments have been made for the closing and latching speed of the door. Exit Hardware Regular inspection and maintenance is necessary in the interests of public safety. Attention must be given to opening and closing with adjustments as necessary to compensate for any door or frame movement. Floor sockets should be cleaned out to prevent foreign matter impeding bolt movement. Lubrication will be limited to the application of a little light machine oil to the pivots of the top tripper mechanism of panic bolts, and to the head of panic latches. Pull Handles & Door Furniture Pull handles and lever knob furniture should be checked periodically for secure fixing. Problems occur where wood screws are incorrectly installed and where the material to which the products are fixed is unsuitable. It is also important to check that knob and lever furniture fully withdraws the latch bolt, again for safety. Coastal Maintenance Stainless Steel furniture in coastal regions should be regularly dusted. Occasionally wash with warm soapy water, dry and polish.