Level 3: Fault Finding
Watch repair Level 3 video course teaching fault finding of watch movements. Featuring high quality full HD video lessons introducing you to the very basics in watch repair.
C3.1 INITIAL INSPECTION
When you receive a watch for service or repair, you may be given an indication from the owner of the watch as to the symptoms of the fault. And this information can help you zone in on the cause.
But even if the watch has no noticeable faults and has simply been presented to you for a maintenance service, an initial inspection should be the first priority.
c3.1.1 Check Hand Setting
Checking the hand setting mechanism is an essential step when you are performing your initial inspection.
c3.1.2 Check The Winding
In this lesson we look at some initial tests with the winding mechanism.
c3.1.4 End & Side Shake
Side-shake is the amount of movement a wheel pivot (or the barrel arbor as in the previous lesson) has from side to side within it’s bush or pivot hole. There should be some movement. If the pivot fits too perfectly or if there is too little side-shake then the train of wheels may very well seize up or not run down uniformly.
c3.1.5 Check Balance & Escapement
Continuing with the initial inspection of the watch movement, this lesson focuses on the Balance and Escapement.
C3.2 FAULT FINDING PATHWAY
The process of focusing in on the cause of any fault in a watch movement will depend largely on which kind of fault you are presented with.
The methods for finding the causes of either of these kinds of faults will vary slightly but you can make the process easier by following a basic path whilst inspecting the movement.
c3.2.1 The Strategy
This lesson contains a breakdown of the strategy behind the Fault Finding Pathway including some demonstrations on how to implement your checks.
Quite often, a watch is presented to you for a basic maintenance service with absolutely no complaints of faults or poor performance. This may be because the watch owner simply does not have high expectations for a watches timekeeping or has grown accustomed to it’s ‘quirks’.
Assessing a watches current performance before you start work on it, assuming the watch is running, can also lead you to potential faults.
C3.3 TESTING THE ESCAPEMENT
After performing the initial inspection, if the cause of any faults was not detected then we should proceed with fault finding and we shall start with the balance and escapement.
c3.3.1 Pallet Banking
In this lesson we will be focusing on pallet banking and the amount of shake (or distance) between the guard pin and the safety roller.
c3.3.2 Drop, Draw To Lock and Impulse
In this lesson we are looking closer at the operation of the pallets as they interact with the escape wheel.
c3.3.3 The Escapement Parts
In this lesson we are taking a closer look at the parts which make up the escapement.
c3.3.4 The Balance Wheel & Staff
The balance wheel is just that, a wheel which is balanced in it’s weight when it is first manufactured so that there are no heavy spots, the balance wheel is riveted to the balance staff.
c3.3.5 The Hairspring
The hairspring is a very fine flat spiral profile coil made from metal, the length and thickness of which affecting the oscillations of the balance wheel.
c3.3.6 The Safety Roller
This video discusses the safety roller and how it plays a roll in keeping the watch movement running.
c3.3.7 The Balance Cock Assembly
In this lesson we discuss the components of the balance cock assembly and we demonstrate the stripping down of the balance.
c3.3.8 Balance End-Stones & Pivot Holes
This video lesson discusses the differences between regular pivot holes and balance pivot holes, and demonstrates the strip-down of a non-shock balance jewel assembly.
c3.3.9 The Pallets
In this video lesson we discus what to look for when inspecting the pallets for potential faults.
c3.3.10 The Escapement Operation
In order to effectively troubleshoot an escapement, it is important to know exactly how it operates. This video discusses the interaction between the balance assembly and the escapement.
C3.4 THE TRAIN & POWER SOURCE
The next step in the fault finding pathway will be to examine the train of wheels and the power source.
c3.4.1 Power Retention
This lesson discusses the various potential points of failure in and around the power source.
c3.4.2 The Mainspring
This video lesson discusses the mainspring within the context of fault finding, and also details how to measure the spring in order to find a suitable replacement.
c3.4.3 Train Speed
This video lesson discusses the train speed or movement frequency and reduction ratio’s within the train of wheels.
c3.4.4 Investigating The Train
In this video lesson we are taking a look for potential problems with the train.
c3.4.5 End & Side Shake plus Jewelling Tool
In this lesson we take a look at the train wheels and demonstrate how we can adjust end-shake by using a jewelling tool.
C3.5 KEYLESS AND MOTION WORKS
This video lesson introduces the next chapter in level 3 of the Watch Repair Course which discusses the Keyless and Motion works in the context of fault finding.
c3.5.1 Problems With Winding
This lesson discusses some of the causes of problematic winding of a watch movement.
c3.5.2 The Setting Lever Spring
This video lesson discusses the setting lever spring and the symptoms that can appear should it fatigue or break.
c.3.5.3 Rough Winding
Rough winding can be cause by quite a few different factors, this video lesson will help you to drill down to a specific cause.
c3.5.4 Problematic Hand Setting
This video looks at the motion works in closer detail and discusses various faults which may cause issues hand setting.
c3.5.5 The Cannon Pinion
This video lesson discusses the cannon pinion and how it can affect the movement should it not be adjusted correctly.