The pinion of winding wheel H is geared to springs look good while they are in the barrel. In the Longines automatic, the mainspring comes with the bridle attached. To replace and check this spring, follow these directions., The Mechanical Clock Repair E-Book is a must-have for clock enthusiasts, DIY repairers, and professionals alike. It covers common issues found in floor, wall, and mantle clocks, providing simple, step-by-step solutions to common clock problems., INTRODUCTION: -What will be learned in the video: -Curing common clock movement ailments. -Proper way to handle the minute and hour hands. -Setting the time. —How much to wind. —Common key size. —Timing speed keys. 2. SOME TOOLS NEEDED FOR CLOCK REPAIR -How to improvise and make some tools. -Where to find tools. -Types of tools to use. 3., I repaired the cannon pinion: Glue the crack with Gorilla® Super Glue and close the crack by clamping the pinion. Clamp it overnight. File out the center of the pinion until it is an almost free fit on the metal spline on the center arbor. Secure the pinion to the arbor with Gorilla® Super Glue. The cannon pinion doesn’t have to deliver , I've been fixing up an old Grandfather clock. The cannon pinion is a very loose fit to the centre wheel arbour. I'm sure I haven't lost any bits. Do I need some sort of grommet to provide the necessary friction. I assume it is a friction fit, so pinching would provide more friction. Or do you mean tension for the hands. Better post a photo., You will find the 400 day clock repair guide book by charles terwilliger is a must if you encounter these clocks. Gives you all you need to know, the correct position of the blocks and the fork is vital..