Disassembling the mechanism of a wall clock. Begin with a pendulum and a suspension spring.
If the minute hand reads incorrectly, turn the sleeve carefully. For this, a square rod is fixed in a vice and, having inserted the arrow hub onto the rod, turn the arrow, then the sleeve is fixed.
With a weak landing clockwise to tighten the hole. If the foot is weakly held on the dial, you should remove the dial from the dial plate and rivet the foot.
Continuing to disassemble the clock, they remove the hammer and correct it if the fastening of the lever or screw is loosened in it or the fastening of the rod in the axis is weakened. These deficiencies can be eliminated by riveting, correcting the thread, picking up or making a new screw.
Before removing the dial wheels and levers, first check their work and note the defects to be corrected.
Then the spring is completely lowered, for which the key is mounted on the winding shaft and with its right hand it is turned a little, the left one lifts the dog and the ratchet wheel is released. Then the key is turned one turn to the left, the dog is released and the procedure described above is repeated until the spring is completely lowered. Before descending the spring, it is necessary to inspect how the combat mechanism is assembled and to take into account all the shortcomings of the course and the battlefield. This is especially true for watches with complex combat.
Having lowered a spring, remove a plug and a pin, strengthening a calculating disk. Then, the parts remaining under the dial are disassembled, for which, by unscrewing the nuts or removing the pins, they remove the platinum. Blow the hammer on the axis remove the counting disc.
After disassembling the watch, it is necessary to inspect all the details of the movement and combat mechanism, the wheels, the teeth, the trunnions, etc., and to identify their malfunctions. It is necessary to polish and align the trunnions, replace the damaged ones with new ones, align the wheels, cut off the holes, align or insert the teeth.
Grind and polish the tribes with a chock with oil drawn on it, removed from the grinding stone. When all the risks and signs of corrosion have been removed, the tribes are cleaned with gasoline and proceed to the final polishing using the same method using diamantine or crocus, and then washed again in gasoline.
If there is a broken tooth in the whole tribe, and there is nothing to replace the tribes, then it is necessary to drill a few holes in place of the broken tooth, cut several holes in them, cut the threads in them, then cut the threads on the steel wire and screw them into the holes, and solder them with silver solder. After this, the tribes need to be descaled, give the pins the shape of adjacent teeth, harden, release to blue and polish.
After the work done, it is necessary to check whether the wheel and the corrected tribe are correctly engaged. The axial clearance of the axes of the wheels of a wall clock should be as small as possible (not more than 0.1 mm).
When inspecting an anchor, it is necessary to fasten the low-lying pallets carefully, and also fix the weakly-seated anchor on the axis. The plug must also be attached to the axle so that it rotates with some friction.
If the work surfaces of pallets or steel brackets are corroded or have risks, they are ground and polished on glass with crocus. The surface of the pallets after polishing should be a mirror.