GMTII not automatic winding anymore

[Finewatch]

My 4 year old GMTII started stopping few weeks ago. I have discovered the autowind function is not working. It will work fine if I wind it manually each day.
Looks like a trip back to factory service.

[Zdenek]

My GMTc (six years old) also had a problem with winding mechanism. It manifested with rattly sound but winding was still working. The rotor pin was faulty. I got the watch from the service this week. ... Maybe the winding mechanism is a weak point of this calibre.

[Finewatch]

Just back from Toronto, Ontario factory service 3-4 weeks
As new again N/C
Awesome customer service
Thanks Rolex

[padi56]

Originally Posted by Finewatch

My 4 year old GMTII started stopping few weeks ago. I have discovered the autowind function is not working. It will work fine if I wind it manually each day.
Looks like a trip back to factory service.

Today IMHO the main Achilles heel in the 3 series movements is the rotor shaft bearings especially if not had any service . And IMO its the 3 series movements weakest link, the rotor winding sleeve bearings. Now these need proper lubrication and its very critical its done right,if it drys out you will get severe wear in the bearing jewels.Looks like to me, Rolex has sacrificed a bit in the engineering department for better winding efficiency. IMO the small diameter winding post don't offer enough support to the rotor weight, but again some go on for decades without service, but many fail for the lack of.

[SearChart]

Originally Posted by padi56

Today IMHO the main Achilles heel in the 3 series movements is the rotor shaft bearings especially if not had any service . And IMO its the 3 series movements weakest link, the rotor winding sleeve bearings. Now these need proper lubrication and its very critical its done right,if it drys out you will get severe wear in the bearing jewels.Looks like to me, Rolex has sacrificed a bit in the engineering department for better winding efficiency. IMO the small diameter winding post don't offer enough support to the rotor weight, but again some go on for decades without service, but many fail for the lack of.

Rolex uses HP1000 lubricant on the rotor axle which is way too thin IMO. At our RSC we use MR4 which is also used for the keyless, it won't flow away and is thicker. We think it's better.
Also the reversing gears can wear quickly which is also problematic for the power reserve.

[ROLLiWORKS]

Originally Posted by SearChart

Rolex uses HP1000 lubricant on the rotor axle which is way too thin IMO. At our RSC we use MR4 which is also used for the keyless, it won't flow away and is thicker. We think it's better.
Also the reversing gears can wear quickly which is also problematic for the power reserve.

Ahhh, this is excellent. I think we will move to MR4 over the HP1000 on the axle as well. Makes more sense.