This Heuer 2000 quartz chronograph came in recently for a service, the watch ran with the chronograph running but spluttered to a halt with it disengaged. This particular Heuer is a modular chronograph meaning the movement powers a separate chronograph module fixed on where the dial would usually sit. Modular chrono’s are usually easily identifiable by the crown being below the line of the pushers. This one is powered by a slightly modified ETA 555.282 quartz movement and the chronograph module is a Dubios-Depraz 2000, these find their way into quite a number of manufacturers chronograph models.
The watch case is PVD coated with in black and the caseback is emblazoned with the Heuer logo and model number.
With the caseback off you can see the typical ETA quartz architecture although there’s a little plate that informs us it’s actually a Heuer calibre 185 🙂
I start by stripping the fragile circuit/coil assembly off before removing the movement.
A quick look at the dial and handset before removing them….
….to reveal the Dubios-Depraz chronograph module.
I can now flip the assembly over and unscrew the movement from the module, it’s secured with two screws.
With it now seperated I can fully strip the ETA 555.282 movement. You can see the modification in this shot, the seconds pinion is shortened and has a gear to drive the chrono module, the hour wheel has pinion leaves where the hour hand would normally fit which drives the motion work in the module.
The strip down continued….
….until it was time to turn it over….
….and strip the train wheels.
I prefer to clean these modular watches in two goes so the movement was now ready for the cleaning machine.
Whilst it was cleaning it allowed me to strip the chrono module. These can be tricky as if your not careful there are quite a few springs that can fly off and ping levers away into the ether never to be seen again!
With the top plate removed you can see the complex start/stop lever work with the more traditional reset lever work at the bottom of the shot.
The reset lever work is the first to be removed….
….then the running seconds wheel, hour recording wheel and minute recording wheel.
This allows the clutch and start/stop leverwork to be removed….
….then the minute train bridge can be removed along with the chrono runner.
The rest of the start/stop lever work can now be removed along with the additional minute train bridge and seconds driving wheel.
It’s now in a position to be cleaned so into the basket all the parts go.
Whilst the module is cleaning I can start re-assembling the movement.
At this point it will now run if a battery is fitted.
The calendar, keyless and motion work is now refitted and lubricated and the movement side of things is done.
This allows me to start on the now clean Dubios module, the seconds driving wheel and additional minute bridge are first to be refitted….
…then the minute train bridge and wheels can be refitted. These modules are very sensitive to using the correct lubricants in the correct amounts, use too much, too little or the wrong type and you’ll soon have problems 🙂
Typically one of the bridge screws sheared off when I refitted it, fortunately I managed to extract the broken off portion without to much drama.
The clutch and clutch wheel goes back on next along with the stop lever and spring….
….then the start/stop lever work, cam, cam jumper and shuttle can start going back on.
Recording wheels are refitted at this stage….
….then the rest lever work goes back on. At this point I’m ready to refit the top plate.
This can be tricky with three extended pivots and a couple of wheels to locate.
The movement is now re-attached to the module and the minute and hour wheels are refitted, the start, stop and reset functions can now be tested.
Dial and hands are now refitted.
The movement is recased….
….and it’s finished. These modular chronographs take quite a bit longer to service than a dedicated chronograph but the Dubios-Depraz units are pretty bulletproof and over engineered and should outlast the movement. This Heuer 2000 chronograph is a very handsome watch I’m sure you’ll agree!