IWC 3714 Portuguese secs@6 A7750 graphite fix and module transplant (pics)

[GenTLe 1,523]

JSJ,

I have around a dry teflon spray lubricant. Wouldn't it be better than graphite?

For now still no sec @6 in my box, but maybe... One day...

[JSJ 0]

JSJ,

I have around a dry teflon spray lubricant. Wouldn't it be better than graphite?

For now still no sec @6 in my box, but maybe... One day...

Good question. It depends if you can leave a Teflon coating with no residue. It takes very little to stop the movement. I tried molybdenum grease and no chance.

[GenTLe 1,523]

JSJ,

I have around a dry teflon spray lubricant. Wouldn't it be better than graphite?

For now still no sec @6 in my box, but maybe... One day...

Good question. It depends if you can leave a Teflon coating with no residue. It takes very little to stop the movement. I tried molybdenum grease and no chance.

Nope: I mean it's not a grease: it simply leaves (after the solvent evaporates) a layer of dry teflon.

I think the only problem is to mask the parts (or not let the gears to fly away spraying them)

[Phanphy 0]

Awesome post! My 3714 secs@6 died within 3 days of receiving it - was quoted $200 to repair it. Might consider opening it up or sending it back to the TD (although a couple of months have passed). Anyone with experience in sending watches back to TDs? (Tswatch)

[GenTLe 1,523]

Awesome post! My 3714 secs@6 died within 3 days of receiving it - was quoted $200 to repair it. Might consider opening it up or sending it back to the TD (although a couple of months have passed). Anyone with experience in sending watches back to TDs? (Tswatch)

You'll not get it repaired by sending it back to China :(

The problem is with movement design, it is not something that can be resolved "forever".

[JSJ 0]

Awesome post! My 3714 secs@6 died within 3 days of receiving it - was quoted $200 to repair it. Might consider opening it up or sending it back to the TD (although a couple of months have passed). Anyone with experience in sending watches back to TDs? (Tswatch)

Which model 3714 is it? I'm in the market for a broken one depending on the version if you want to sell rather than send it back.

[JSJ 0]

OK here are some pics from when I added the secs@6 module to a new A7750 movement:

 

I will add the pics first and then edit the post when I have time. At least it may help you if you want to do it yourself.

 

First take a non-functioning and very pretty rep 3714:

 

 

and a new A7750

 

 

 

 

 

 

 

 

Day-date module needs to come off

 

 

 

 

 

On the brass secs@9 gear you can see the pinion for the sub hand. That will foul the secs@6 module

 

 

Cut it off. My protection method was to put the movement in a plastic bag to protect it.

 

 

Gone.

 

 

 

This pin fouled the module and would not move, even with a little persuasion, so I decided to drill a hole in the secs@6 module to clear it instead of risking damaging the movement by forcing the pin out.

 

 

Marking out the hole position was not all that easy so I decide to go large rather than have two bites at it. There is plenty of strength in the plate.

 

 

Here you can see one of the 4 extra jewels in the later secs@6 modules. They really do have them.

 

 

A hole has appeared in the plate.

 

 

The other fouling pin came out with a little help from some persuaders.

 

 

Might as well graphite the thing although I reckon the cleaning is the most important step.

 

 

Reassembly.

 

 

 

Clearance hole in the module. Good job I made it big enough! Not exactly concentric.

 

 

 

 

 

All square and shipshape.

 

[MDK 0]

Good work, i am going to clean polish and graphite my IWC 3878. Secs @6 is a bitch, you roll the dice on these, but they are just too nice not to.

[Daywatch 4]

All this seems so easy and logical - if You have the skills and tools to do it:)

 

Awesome pics and nice tutorial, thanks JSJ

[GenTLe 1,523]

I like it!

My little humble question is: what prevented you to fix the 7750, while it was already 1/3 unassembled, instead of using a new one?

Not that you should have done my way: just curious of the problem:)

 

 

PS: "because this way I could make the tutorial" is not a valid reply :P

[JSJ 0]

I like it!

My little humble question is: what prevented you to fix the 7750, while it was already 1/3 unassembled, instead of using a new one?

Not that you should have done my way: just curious of the problem:)

 

 

PS: "because this way I could make the tutorial" is not a valid reply :P

Because this way I could make the tutorial

 

In fact, the movements coming from carbinet on eBay always give me a good feeling. They are definitely lubricated and they come well regulated. They are only Asian ones so definitely not as good as Swiss but still better than the random quality in the average rep.

 

I can't buy parts for Asian 7750s so I could investigate, find the fault and still not be able to fix it. Of course, now I have some parts from the old movements.

 

I did also want to see if this transplant was possible.

[Cubic Hare 494]

Thanks for sharing. A great read and nice pics too. As an IWC owner I might just need this as reference one day.

 

Cheers

[GenTLe 1,523]

Thanks mate, I like Walter's movement too. My first 7750 service was exactly on one of those movements (which by the way wasn't oiled) bought on purpose of trying the disassemble/reassemble on a spare movement

Maybe that 7750 simply needs a service

[Left Coast Guy 26]

Overdue, but great post!!

[ericb196 0]

great post JSJ, you convinced me to give it a try with a 3714 I hope I won't regret it too quickly

[Asaf 0]

Great review.

[porschespeedster 19]

this is why reps rule!