GU Old Style Gearbox 35mm

A replacement centre case gearbox for the GU old style multipoint door lock mechanism. If you're having problems with your door lock, the gearbox is almost always the problem and changing it to a GU Old Style Gearbox is as simple as removing a few screws.

GU Old Style Gearbox Information

• Important Measurements: 35mm Backset / 92pz Centres

• This is the mechanism inside the door that is operated by the handle.

• Most likely to be the problem when a lock fails.

• Reversible latch for left or right-handed doors

Fitting Advice

The gearbox is easily reattached to the locking strip via three-star head screws. 

Technical

A full technical diagram is included in the image gallery.