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Service Details

When undergoing a service we completely dismantle and clean the clock before rinsing it ultrasonically in top brand environmentally safe solutions and then attended to in stages.

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Service Stage 1

Clock undergoing a service

Firstly we place all internal items to one side and checked for wear. Then we brighten up the items by hand and remove any rust from steel-work paying particular attention to the escape wheel for bent or short teeth. Next we burnish any worn pivots and replace any badly worn ones. Noting any excessive wear, we assemble the barrels. We remove any old clock line knots as these can come out and trap the great wheel when winding.

Service Stage 2

Attention now turns to fitting all the newly treated internals into the clock plates marking all worn bushes including the pallet arbour and back cock. We then make sure that any oval holes are pulled back on centre and then the clock is bushed where needed after checking that no one has inadvertently moved over the rear centre arbour bush in the past. This causes the hands of the clock to become in near contact with the dial face at some point; we also check that the centre arbour extension itself is not bent as this can cause the same problem.

Custom made bushes are installed on clocks of high quality Bergeon brass bushes using Bergeon bushing equipment are installed to others. We re-install the internals and broach new bushes. The clock trains are then spun and tested: face up, face down, noting any stickiness and ensuring that the trains are free running.

The pallets and back clock are fitted in place. The escapement is roughly examined and noted for its drops and wear. We remove the pallets, clamping a gauge to the inner side of a clock plate to test the escape wheel for concentricity. Then we make any corrections in situ with very fine needle files and papers. Doing this in situ instead of using the jewellers lathe is a slower process. But it is more accurate if the escape wheel is only a small amount out or has few high teeth.

Now we attend to the pallets and face. Polished and/or rebuilt as required. When we have correctly adjusted the escapement the pallet arbour is horizontal to the clock plates. If the back cock has elongated screw holes we pin it to stop it moving. When all is satisfactory we once again dismantle the clock. The clock plates are brightened up, the trains refitted, and the strike train is timed. The gathering pallet is left on in its correct position and the plates are pinned. At this stage the clock is oiled with quality clock oil.

Service Stage 3

Next all items belonging to the front plate are brightened up and any rust removed. The front pivots or stub arbours are refitted, then the minute wheel with its thrust. We then refit the hour wheel bridge. Making sure that the bridge pipe is not binding on the minute wheel extension. Next we fit the minute hand and collet, checking for the correct amount of tension applied to the thrust washer. Also that the hand collet is of the correct thickness so the front of the minute wheel is not binding on the back of the bridge.

We also check that the reverse minute wheel is in mesh and in line with the minute wheel. The hand is removed and the hour wheel fitted checking for wear and alignment. All the strike levers have their working faces smoothed and polished. The rack and tail is checked for any movement. All items on the front plate are then fitted including both hands, noting the striking sequence with its snail and correcting any misalignment.

Service Stage 4

When all is to our satisfaction we fit the gut line whilst carefully ensuring not to score the clock line. Then, we fit the seat board followed by the bell stand and bell. Next we check the crutch against the suspension block and bridge. Now comes the set up on test stand and run. After approximately thirty minutes we check the clock for recoil and the amount of pendulum swing. A day or so later we fit the dial. Ensuring that the movement is correct and running properly. We treat all repairs in this manner.