I have a Pam GMT and CG wont lock

[Guest Dr.TuB]

I have a PAM GMT and i have recently got the keyless fixed (broke the stem inside the keyless while trying to take it out) the stem and crown was replaced and now the CG wont lock.

help is needed! what do i need to do?

[Ztech]

You probably just need to shorten the stem a bit to get the CG to close. Good luck.

[Krayfish]

Tub's not sure this hobby is right for you buddy!

lol........you seem to have lots of bad luck with these damd things!

[Guest Dr.TuB]

how does one shorten the stem?

and krayfish, yes i think im going to quit this hobby soon. maybe just gens from now on....

[Rocketeer]

Take it back to whoever fitted the stem for you and get them to do it properly?

You can sometimes get away with just winding the crown an extra turn down on the stem.

[spooky driver]

how does one shorten the stem?

and krayfish, yes i think im going to quit this hobby soon. maybe just gens from now on....

But Dr T I think it's because you wont leave them alone...this year's new year resolution should be, never take the back of a watch ever again!!

[sssurfer]

What does it mean "the CG won't lock"?

1. The CG does not arrive to the case anymore, rather it touchs the crown instead?

2. Or you cannot close the lever because you feel too much resistance against the crown?

3. Or, if you close the lever, the lever stays floppy and it does not press the crown?

Shortening the stem is a fix to cases 1 and 2, but not 3.

[Guest Dr.TuB]

i have just found out that the crown for the PAM GMT is different from the crown of the PAM 111H

i think my watchsmith replaced my GMT crown with a 111H (or similar) crown.

is what im saying true?

also what i mean it wont lock is that i cant close the lever.

What does it mean "the CG won't lock"?

1. The CG does not arrive to the case anymore, rather it touchs the crown instead?

2. Or you cannot close the lever because you feel too much resistance against the crown?

3. Or, if you close the lever, the lever stays floppy and it does not press the crown?

Shortening the stem is a fix to cases 1 and 2, but not 3.

[sssurfer]

is what im saying true?

Yes, there's no gurantee that different models have similar crowns.

also what i mean it wont lock is that i cant close the lever.

Because it pushes too hard on the crown?

In this case, most likely your new crown is thicker than the old one.

Your best fix is using a crown thick as the old one.

If this is impossible, then shortening the crown tube (the tube on the case where the crown goes into), and possibly the stem too, may work.

[Guest Dr.TuB]

sql_pl was nice enough to send me a rep gmt crown.

does anyone know how to replace the crown?

or does anyone have a rep 111H or similar cg (non gmt models) that they can sell me. replacing the cg might be easier than replacing the crown.

[sssurfer]

Replacing the CG does not gurantee that the new CG fits your new crown. I suggest you replace the crown instead.

To replace the crown you need to perform the following steps:

1. Remove the CG.

2. Set the crown in winding position.

3. Open the watch caseback.

4. Gently pull the crown+stem out while releasing the stem by pushing with a needle on the small pin that is close to the stem and to the movement's border.

5. Measure the crown+stem length with a digital caliper.

6. Firmly hold with pliers the stem near its base (close to the crown small tube), and unscrew it off the crown tube.

7. Fully screw the stem into the new crown tube.

8. Measure the new crown+stem length. If it exceeds the original length measured in 5, then you will need to shorten the stem (instructions will follow if needed). If it is lower than the original length, then you are out of luck and you will also need a stem extender.

9. Gently push the new crown+stem back in place into the movement, by contemporarily pushing the same pin as in 4.

10. Close the watch caseback and reinstall the CG. Done.