Jump Hour Lubrication

[spiro13]

Hi

I have a couple of Jump Hour watches and would like to know the type, if any, of lubrication used on the dial side jump mechanism.

Thank you

Tony

[Geo]

I'm sure there must be some of you able to offer spiro13 some advice? I've had no experience whatsoever with this type of watch.

Edited February 2, 2015 by Geo

[bobm12]

Me neither but I would say D5 and, where it should have finer oil, Moebius 9010 should do the trick...but those are some of the ones I always have at hand, so it is just me! Maybe another member can suggest the recommended one!

 

Cheers,

 

Bob

Edited February 2, 2015 by bobm12

[noirrac1j]

Spiro what's up buddy? Welcome to the forum,

 

I don't recognize the movement....what is the movemnt of type of jump hour in the foto? I've done many baumgartner and Bettlach ebauches and this is what has worked for me:

Moebius 8300 oil for the mainspring

Moebius 9501 for crown wheel, stem, and winding mechanism

Moebius Microgliss D-5 oil for setting mechanism and keyless works

Moebius 9415 for the pallet and impulse

Moebius 9010 for drive wheels

 

Be careful not to put much oil on the dial side (if at all) because this has cause sticking problems for me in the past: particularly with Sicura spinning discs. I only oil the  hour/date  wheel spring and locking mechanisms--very little and nothing on the minute wheel.

[Geo]

Good man Joe, I knew I'd smoke you out! :)

[spiro13]

Hi

 

The question about the lubrication doesn't refer to the normal movement parts, i.e., Balance Pivots, Wheel Pivots, Pallet Fork etc. My question deals with the Dial side parts that move the number wheels. The levers and the cam on the Canon Pinion. The first picture is a Dial-O-Rama with a Benrus FG25 movement. The second picture is from a Gruen Air Flight with a N510SS movement.

 

noirrac1j you from Brooklyn? I'm originally from the Bronx.

 

Thanks

 

Tony

Edited February 2, 2015 by spiro13

[noirrac1j]

Hey Tony!

Yeah I live in Bushwick and grew up in the Bronx: The Concourse, Kingsbridge, Fordham Rd. and the Little Italy sections. I have not worked on Benrus, but they have number wheels so its not that different from other jump hours. For the levers that control the wheels I use a little Microgliss D5. I wouldn't oil any of the contact area of the  hour/minute wheels with dial side because the oils can actually induce adhesion between the two. For the cams I again use a small amount of D5 and it works perfectly. The Benrus has hour/minute/and second wheels, so this is very much like a Sicura and my oil suggestions should be fine. The Gruen Air Flight looks more like a traditional watch, and so I would treat the " jumping 24 hour" wheel as a date disc and simply oil the lever and the contact point between the disc and cam pinion. Be conservative in the oiling.  Post again when the watches are done!

 

Regards,

JC

[spiro13]

JC

 

Thanks much for the information. My area of the Bronx was Matilda Ave. near the elevated subway. We then moved to Mt. Vernon. 

 

Regards

 

Tony.

[Willyrover]

A Benrus technical bulletin from the time (No. 102) says: "Do not lubricate any part of the disc mechanism. The cannon pinion ONLY is to be oiled in the usual manner."

Also, the spring in the Benrus should be riding on the outside of the copper cam wheel. Looks like it's sitting on top of the cam in the picture.

[noirrac1j]

Hi Willy rover,

Yes this is corect and also my experience. I do not oil any part of the discs as I stated in my earlier reply to Spiro. I don't have any bulletoins to share, but I know from experience with Sicura jump hous watches that if you oil any of the discs, they will stick or drag in thier rotation. Only the cannon pinion is to be oiled.

 

JC