Maco MA53463 Latch Deadbolt 4 Mushrooms Lift Lever 45mm Backset Multipoint Door Mechanism

This is the Maco MA53463 Latch Deadbolt 4 Mushrooms Lift Lever 45mm Backset Multipoint Door Mechanism, it is part of the Maco G-TS range

Most G-TS locks have been discontinued by Maco, however, there are some G-TS locks left in either a 28mm or 35mm backset which can replace the original versions with little work.

G-TS lock gearboxes have been manufactured in various different versions over the years and its important to select the correct one, as they are not interchangeable. The current G-TS lock started production on 2010 and features different screw fixing positions to previous versions of the lock.

A good way to tell if you have the new or old version is the new version will have a square latch reversal button next to the latch.

Maco G-TS gearboxes feature lift lever functionality. They measure 228mm high by backset + 18mm wide. The centres (PZ) are 92mm. The latch is 29mm high, the deadbolt is 30mm high and the distance from the bottom of the latch to the top of the deadbolt is 54mm.

These gearboxes are fixed to their faceplates with 3 screws. The top screw to middle screw measures 57mm. The middle to bottom screw measures 180mm.

Maco refer to their rollers as i.S. cams which are made of hardened steel to resist attack.

These i.S cams work in the same way as rollers which are used for compression, to pull the door against the frame, to help prevent dust or water ingress. They do little for security, but they also have the added benefit of helping to prevent the door from becoming warped as it is supported across its full height. This is dependent on the rollers being engaged into their keeps.

Rollers are normally adjustable by 1mm to help achieve optimum weather sealing.