Post by Archer on Nov 9, 2010 9:27:01 GMT -6
At the request of Tyler, here is a post showing the servicing of an Omega Speedmaster, with a Cal. 861 movement.
Here is the watch, ready to start the service:
I use my case opener to open the case:
A good view of the Omega Cal. 861:
Upon inspection, I see one adjusting screw for setting the depth of engagement for the chronograph wheels is broken and will need to be replaced:
Here the movement is out of the case, and I prepare to remove all the hands:
With the dial removed, you can see the chronograph parts and winding/setting, which I now begin to remove:
I now flip the movement over, and start taking apart the main portion of the movement:
Here I use my wheel puller to remove the driving wheel for the chronograph mechanism:
Now I am taking apart the base movement:
Here it is all apart - I was wearing my Master Moon the day I disassembled the watch:
Here some of the parts are in the baskets, and ready for the cleaning machine (all parts were cleaned):
After cleaning, I start by pegging all the jewels:
Now some assembly on the 3/4 plate:
I then lubricate the balance jewels, and install the balance on the main plate. Here I can see all around the balance without anything else installed, and I can tweak the balance spring for flatness and centering with my #5 tweezers:
Of course a new mainspring is installed:
Here I place the escape wheel into a plastic mesh basket in order to epilame it:
Now I assemble the main plates and wheels:
When I have the weels and plates in place, I check the end shake on all the wheels - some need adjusting, so I use the Horia tool to move the jewels. I am typically moving these jewels 1 or 2 100ths of a mm:
Here I'm moving the escape wheel jewel - the end shake was quite large on this one:
After lubricating all the jewels, I use the Horia tool to press the chronograph drive wheel back on:
I now epilame the jewels on the pallet fork:
Now the pallet fork is installed:
I then flip the movement over, and start installing the winding/setting mechanism:
Now I install the balance, and let the watch run for about 10 minutes. This wears away some of the epilame on the pallet jewels, creating a nice channel in the coating that holds the lubrication in place:
I then remove the balance, and lubricate the escapement - here you can see the red arrow points to the exit stone where I will apply small drops of lubricant (Moebius 9415):
Here I demagnetize the movement:
After doing some initial timing checks to verify that the base movement is running well, I carry on with the assembly and lubrication of the chronograph parts:
Here I apply epilame to the pivot of the chronograph wheel to prevent oil from creeping down to the hands:
More assembly:
Back to the dial side:
Here I press in the new adjusting screw to replace the damaged one:
And now I can adjust and check the depth of engagement between the chronograph wheels - I use the microscope for doing the checks:
Here the watch is on the timing machine, checking the positional variation at full wind:
Looks good:
Now the dial is mounted, and the sub-dial hands are installed first:
Note the movement holder. This is specific for this movement in order to suppport the jewels and actuate the chronograph buttons while I install the hands. Here all the hands are in place:
Here the movement is back in the case:
All cased up now:
I now preform a series of extended timing checks. This includes putting the watch on the test winder. The watch above is an IWC chronograph I had repaired around the same time. Although the Speedy is a manual wind watch, this winder helps me get a feel for how the watch will perform while it's being worn:
Last thing is to check the watch for water resistance, using the dry testing machine:
It looks great:
That concludes the service - hope you guys enjoyed seeing this.
Cheers, Al
Here is the watch, ready to start the service:
I use my case opener to open the case:
A good view of the Omega Cal. 861:
Upon inspection, I see one adjusting screw for setting the depth of engagement for the chronograph wheels is broken and will need to be replaced:
Here the movement is out of the case, and I prepare to remove all the hands:
With the dial removed, you can see the chronograph parts and winding/setting, which I now begin to remove:
I now flip the movement over, and start taking apart the main portion of the movement:
Here I use my wheel puller to remove the driving wheel for the chronograph mechanism:
Now I am taking apart the base movement:
Here it is all apart - I was wearing my Master Moon the day I disassembled the watch:
Here some of the parts are in the baskets, and ready for the cleaning machine (all parts were cleaned):
After cleaning, I start by pegging all the jewels:
Now some assembly on the 3/4 plate:
I then lubricate the balance jewels, and install the balance on the main plate. Here I can see all around the balance without anything else installed, and I can tweak the balance spring for flatness and centering with my #5 tweezers:
Of course a new mainspring is installed:
Here I place the escape wheel into a plastic mesh basket in order to epilame it:
Now I assemble the main plates and wheels:
When I have the weels and plates in place, I check the end shake on all the wheels - some need adjusting, so I use the Horia tool to move the jewels. I am typically moving these jewels 1 or 2 100ths of a mm:
Here I'm moving the escape wheel jewel - the end shake was quite large on this one:
After lubricating all the jewels, I use the Horia tool to press the chronograph drive wheel back on:
I now epilame the jewels on the pallet fork:
Now the pallet fork is installed:
I then flip the movement over, and start installing the winding/setting mechanism:
Now I install the balance, and let the watch run for about 10 minutes. This wears away some of the epilame on the pallet jewels, creating a nice channel in the coating that holds the lubrication in place:
I then remove the balance, and lubricate the escapement - here you can see the red arrow points to the exit stone where I will apply small drops of lubricant (Moebius 9415):
Here I demagnetize the movement:
After doing some initial timing checks to verify that the base movement is running well, I carry on with the assembly and lubrication of the chronograph parts:
Here I apply epilame to the pivot of the chronograph wheel to prevent oil from creeping down to the hands:
More assembly:
Back to the dial side:
Here I press in the new adjusting screw to replace the damaged one:
And now I can adjust and check the depth of engagement between the chronograph wheels - I use the microscope for doing the checks:
Here the watch is on the timing machine, checking the positional variation at full wind:
Looks good:
Now the dial is mounted, and the sub-dial hands are installed first:
Note the movement holder. This is specific for this movement in order to suppport the jewels and actuate the chronograph buttons while I install the hands. Here all the hands are in place:
Here the movement is back in the case:
All cased up now:
I now preform a series of extended timing checks. This includes putting the watch on the test winder. The watch above is an IWC chronograph I had repaired around the same time. Although the Speedy is a manual wind watch, this winder helps me get a feel for how the watch will perform while it's being worn:
Last thing is to check the watch for water resistance, using the dry testing machine:
It looks great:
That concludes the service - hope you guys enjoyed seeing this.
Cheers, Al
