My first automatic movement, Seiko 6309a, seems to have resistance in motion works after servicing

[Bulletmagnate]

After servicing, I spun the motion works by turning the spring drum and everything turns correctly, but it felt like it took more effort than it should. My suspicion is confirmed because I have to wind the spring a lot to get the balance wheel going, plus the watch will only run for a bit more than an hour. I had lubricated as shown on videos and I find no faults in the parts or bearings. What are some things that could cause this? Thanks for any help!

[mikepilk]

If you are sure that the balance is spinning freely? - a blast from a puffer and it should still be moving well after 30s.

Is the gear train running freely - without the pallet or barrel, blow with a puffer and check it all spins freely. Check endshake of all wheels.

A common problem is wear on the barrel bridge arbor hole. Remove the ratchet wheel from the barrel, stick some pegwood in the barrel arbor thread and check for side shake, and up and down for end shake.  Too much and the barrel can touch the brige, mainplate or a wheel.

You can see how to check in this video

 

Edited February 13 by mikepilk

[Nucejoe]

 Concurring  with Mike, barrel lid ought be fitted in the barrel & sit flush level with the barrel wall, check if its level ( first ) as you lift the barrel bridge when disassembling.

Barrel lid must fit tight in the barrel.

 Check if mainspring is coned, which can happen when previous watch destroyer has pulled the spring out of the barrel. Coned mainspring can push out a loosely fitted  barrel lid.

The click also can diminish spring's torque.

Good luck 

 

[Bulletmagnate]

Wow, I watched that video. I hadn't thought of that! First, I will find out if the arbor hole is oversized. I'll let you know what I find, and if I can correct it. Thanks for your time!