Dismantling the Manifoil Mk4 Combination Lock
For some reason my Manifoil combination lock had had its wheels glued together and the fence sawn off the lever, which meant that it worked using just the two drive cams. As these can't have their gates altered, the combination would always be 50,50 (or 0,0). For this reason I wanted to take the lock apart to make it work properly.
Taking the lock apart is easy - all you need to do is lift the parts off, or sometimes slide c-clips off. The only slightly hazardous part is taking the rollers and lever off, as the springs may fly into your eyes. It is probably sensible to make a note of the order the parts come off in. The reassembling
page has how to put the lock back together.
This is how the lock appeared to start with. You can see the glue round the base.
Here you can see the lead shield that hides the wheel pack from x-rays:
The amount of glue the lock was covered in. Note how the change key holes have been filled in too.
More glue pictures. In this one you can see the bottom of the wheel pack cover has had a part broken/sawn out for some reason. It is easier to remove the wheel pack cover if the gates are aligned, but I'm not sure why this is.
The wheel pack. I had prised the wheels slightly apart - before they were glued completely together.
More wheels. The glue used was rubbery but stuck well to the brass. The only way I could remove it was to pick it all off using dentistry type tools. Due to its rubbery nature some of it could peel off. If it had been a harder more brittle glue it would have taken hours to pick all the bits out.
This is the first wheel and the base after I had removed the glue and used wirewool and Brasso to clean them up. (I also photographed it without a flash so it looks brassier than the previous two pictures).
Go To Part 2