A Guide To Replacement Gearboxes For Maco Multipoint Door Locks

This is a guide to help you identify a replacement gearbox for your Maco multipoint door lock. The Maco MK1 and Maco MK2 series of replacement gearbox are now discontinued, follow this guide to identify which of the newer series you should use as a replacement.

Maco MK1 Series Multipoint Door Lock Gearboxes

The original MK 1 gearbox Featured a latch only. It was later reproduced by Maco to retrofit the original gearboxes (Right-hand image) but both are now discontinued.

• Solid latch
• Lift lever function
• Produced in 25, 28, 35 and 45mm backsets

Replacement

Use a full-length latch-only multipoint lock. The lock case is the same height but the latch is lower down so the keep will need to be repositioned.

Maco MK2 Series Multipoint Door Lock Gearboxes

The 2nd generation gearbox featured a deadbolt and was otherwise the same as the retrofit MK 1 version.

• Solid latch
• Lift lever or auto-locking functions
• Identified by a serrated button on the side of the case

Replacement

Use a MK 3 gearbox to replace this gearbox. Originals are no longer made but copies are now available.

Maco MK3 Series Multipoint Door Lock Gearboxes

The MK 3 gearbox was the first gearbox to feature a split latch. This gearbox will replace the MK 2 version.

• Originally available in split spindle or lift lever but replacements are only available with lift lever function.

Latch Reversal

Push up the serrated button on side of the case, remove the latch, reverse and reinsert.

Nightlatch Reversal

Automatically reverses. However, if being used on outward-opening doors, a 3MDL4060 latch must be used.

Maco MK4 Series Multipoint Door Lock Gearboxes

The MK4 is one of two gearboxes produced by Maco currently. It will not replace the MK2 or MK3 because of the different location of the faceplate fixing screws.

• Available in lift lever or split spindle functions
• Features a square button on the side of the gearbox

Latch Reversal

Push in square button on side of the case, remove the latch, reverse and reinsert

Nightlatch Reversal

Automatically reverses. However, if being used on outward-opening doors, a 3MDL4060 latch must be used.

Maco MK5 Series Multipoint Door Lock Gearboxes

The MK5 is the latest gearbox produced by Maco. It will not replace any of the earlier versions because of the location of the faceplate fixing lugs.

• Available in lift lever or split spindle functions

Latch Reversal

Push up the serrated button on side of the case, remove the latch, reverse and reinsert

Nightlatch Reversal

Automatically reverses. However, if being used on outward-opening doors, a 3MDL4060 latch must be used.