Tag Heuer Formula 1 CAC1111-0 Repair / Service (Quartz ETA G10-711)

Rob brought me his Tag Heuer Formula 1 CAC1111 for repair. It came as a non runner. It is powered by an ETA G10-711 Quartz movement.

A new battery would not get the watch running again.

Tag Heuer Formula 1 CAC1111-0 Repair Service

I place the watch on my Quartz testing device. No regular pulse is detected, which indicates that the issue is most likely electronic rather than mechanical.Tag Heuer Quartz Test

 

In any case, these G10.711 movements are not serviceable, they cannot be stripped down, inspected, cleaned and lubricated like the higher end ETA quartz movements. They are also relatively inexpensive, so it would cost more to service than to replace the whole  movement in this instance.ETA G10.711 replacement

 

The movement is removed from the case, and the hands are carefully removed.

 

A new movement is sourced.ETA G10.711

 

The dial is fitted to the new movement.

 

Hands are fitted, making sure the 3 chronograph hands are perfectly aligned with the zero markers. The 6’o clock subdial is a running second, so this one just needs aligning with any marker.Tag Heuer Formula 1 Service

 

Tag Heuer Pressure Test

 

 

I check the water resistance of the case prior to reassembling the watch.

 

 

 

 

When fitting the bracelet, I notice one of the springbars is smaller than the other one. Sure enough, the thinner one is slightly too loose within the bracelet, which could lead to premature wear of the end link of the bracelet.Wrong Spring Bar Fitted

 

Correct Springbar

 

 

I measure the diameter of the correct springbar.

 

 

 

 

And source the correct springbar.

 

And here we are, a straightforward job. The watch now has a brand new movement, and a minor snag was fixed along the way. Tag Heuer CAC1111 Repair Service

 

 

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2 Replies to “Tag Heuer Formula 1 CAC1111-0 Repair / Service (Quartz ETA G10-711)”

  1. I was wondering with newer TAG Heuer quartz watches are they also non rebuildable? I own 4 F1 series watches and if I ever have to have them repaired, I don’t want to throw them away because of their movements or because they are quartz. Please send me a email back thanks.

    1. Hi Tim
      It really depends which F1 model we are talking about (and how much “newer”). The latest F1 watches have Ronda movements fitted as far as I know. They are relatively inexpensive movements, so if a repair is needed I would say the best course of action is to replace the movement.
      I hope this helps
      Olivier

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