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    • By Calvin
      Hello guys..
      Why my seiko speedtimer 7015 chronograph run smoothly when its day(morning till evening)
      But its stop and heavy when its time to changing the day date,whats the problem and how to fix it..
      Thankyiuu
    • By Delgetti
      First of all my apologies for not having documented the disassembling, but the watch arrived in a terrible condition and I stripped it down right away to get rid of all that dirt.
      If you have worked on some watches yet and think about entering the chronograph world with a 7734 let me give you 3 advices:
       
      Do it! The 7734 is a solid construction and not too complicated. Take your time and watch all the 6 parts of Mark's Venus 175-service on youtube. Of course the Venus is a column wheel system, but the basic movement is very similar and also on the chrono layer you can learn a lot especially about lubrication: https://www.youtube.com/watch?v=EI3T-IR3AgM Download the 7734 service manual. A lot of information here: https://strela-watch.de/valjoux-7734-7733-7736-technical-documentation/  
      Here we go. Some 8200 for the barrel and the new mainspring goes in (got it from cousins - what I'm gonna do after Brexit?  ).

       
      The complete barrel. Some D5 for the arbor. 

       
      Putting in the wheels and the bridges. Lubrication: 9010 for the escape wheel and the second wheel, D5 for all others. 

       

       

       

       
      The keyless works. 9501 for the stem and the gears. 

       
      D5 for the wheels and the lever axis, 9501 for the contact points of levers and springs. 

       

       
      The click spring. 

       
      D5 for the click and the crown wheel, 9501 for the contact point of click and its spring. Finally the ratchet wheel goes in.

       
      The pallets go back in, no lubrication for the pivots. 

       
      Lubricating the balance jewels with 9010. 

       
      The balance back in. The escape wheel and the pallets got epilame so I let run the movement with dry pallets for some minutes. 

       
      After that 941 for the pallets (work from the dial side through the window).

       
      Now I start with the chronograph. First the bridge and the spring for the levers go in. 

       

       
      Fly back lever goes in with some D5. 

       
      Operating lever, again D5 for the axis. A little bit tricky, you must upline the integrated spring with the upper lever first (9501 for the contact area). The second pictures shows the final layering. 


       
      The sliding gear goes in, D5 for the lever axis, no lubrication for the wheel!

       
      At this point I forgot to put in the minute recorder runner (no lubrication). You should install it here, later its going to be more difficult. 
      The blocking lever (D5) returns. Some 9501 for the contact area to the sliding gear. 

       
      The blocking lever spring. Be very careful, this one isn't just a flyer, its a damned Lockheed SR-71 Blackbird. 

       
      The friction spring (gets a drop of 9010). 

       
      The chronograph runner and its bridge (9010 for the long pivot and the jewel in the bridge). 

       
      The minute recorder jumper, no lubrication. 

       
      The hammer. D5 for the axis, 9010 for the lever ends that hit the hearts, 9501 for the contact areas to the sliding gear, fly back lever, operating lever, jumper. 

       
      The hammer cam jumper. 

       
      Before installing the clutch give 9010 to the pivots of the coupling wheel. D5 to the lever axis. 

       
      The spring. 9501 for the contact point. 

       
      Finally line up the driving wheel with the coupling wheel and the chrono layer is complete again!

       
      The dial side. Some 9501 and the cannon pinion goes in.

       
      Hour wheel with D5.

       
      The dial rest with its 3 screws.

       
      The date indicator.

       
      The date indicator driving wheel with some D5.

       
      The jumper with D5 to its axis. As there was no lubrication described in the manual between disc/jumper or disc/wheel and the parts looked well polished I didn’t lubricate. It works - let’s see how long.

       
      The guard with 2 screws.

       
      Finally the spring.

       
      The dial comes back and is secured with its 2 screws from the side.

       
      While disassembling I put the little hands into seperate trays to prevent mixing them up.

       
      Now I turned the crown in the setting position exactly to the point when the date switches and put on the hour hand to 12.
      Positioning the chrono-hand exactly on zero was that tricky that I forgot to take a pic.

       

       
      New springs and gaskets for the pushers. Unfortunatly I’m not good in restoring cases. So just refreshing the brushing a bit and some cape cod work.

       
      The movement back in the case and secured with 2 screws. A new gasket for the caseback and here we are.

       

       
      Thank you for watching. 

    • By RyMoeller
      I recently acquired an Omega Speedmaster automatic from the 1970's that has the Omega 1045 / Lemania 5100 movement inside.  Long story short- the previous owner tried to service it and made a mess instead.  I've managed to source all the parts I think I need except one for the automatic works- the Stop Spring (part no. 1414).  This looks like a part I may be able to fabricate but if the original is available I would prefer that.  Unfortunately I've come up empty with my usual suppliers.   Cousins is the one one who may have it, but it's Restricted which I suppose means you need to be an Omega authorized technician (which I naturally am not) to purchase.

       
      If anyone has a lead to follow I would be most grateful for your assistance.  This piece is a proper mess right now but I think I'm close to bringing it back from the dead.

    • By RyMoeller
      Here's a look at the finished product. The new luminous paint has been applied with a light tint to give it an aged appearance which compliments the dial. The hour and minute hands have been painted with the same batch to ensure a proper match. They'll be affixed to the movement once the paint has cured for several days.
    • By RyMoeller
      The old paint has been removed to review the markings underneath. The old luminous paint came away quite easily with a bit of pegwood.
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    • Welcome to the forum.
    • Your original description reminded me of a recent problem I had with a different movement.  I switched screws.......The head on the screw holding the pallet cock turned out to look the same, but had a minutely thicker head.  This caught the balance and stopped it.  I felt really silly but it was a very rewarding fix!
    • If you didn't clean the balance jewels introducing fresh oil could dislodge the old gummed up oil and make things worse. I'm afraid you you wont make much progress without cleaning the balance jewels. Assuming you have checked that all jewels are clean and balance pivots are not bent bu the problem still persists,... I would check the endshake of the balance. A watch this old may have had the balance staff replaced and the replacement may not have been an exact fit. On most watches you can adjust the endshake a bit by pushing the jewel housing in the mainplate up or down a bit (using a staking set). Note that this may change the interface between roller jewel and pallet fork so this needs to be considered. On larger mens watches you can sometimes get a screwdriver between the hairspring coils to remove the jewels but on these smaller ladies watches its not so easy. Good luck Anilv
    • Hello all, Imnew to the group, been collecting for only a short time. saw Marks youtube vids, and gave a crack at the basic course. I've retired from the open heart team and very used to working with loops on mm objects. This subject of watchmaking has always interested me, but family and work always to precedence.
    • I have a Solution - Clear nail polish Find an inconspicuous spot then under magnification put a small drop on the tip of a pin and try to mix it into the plastic. If it polish changes colour you have your glue if not, let it set to see how well it adheres anyway. If above fails try another brand - nail polish is just a solution designed to dissolve shiny plastics an their additives.
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