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Vostok 2416b Service notes

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Service notes
Boctok caliber 2416b
Dave Murphy

Instructions are below each picture.

Back Side:

Remove 1 screw and rotor
Remove Stem
Remove movement from case
Remove hands and dial

1 screw and reversing wheels keeper
3 screws and auto-wind bridge

1.) Reversing Wheels
2.) First Reduction Wheel
3.) ratchet wheel driving wheel
4.)Screw, click, and click spring underneath
5.)screw and ratchet wheel
6.)Left Hand screw and crown wheel

At this point, You can (and should) unwind the mainspring barrel.

Remove 2 screws and Movement Spacer
Remove 2 Dial Screws (not seen in this photo)
Remove Calendar Jumper Spring
Remove 3 screws and Calendar cover plate

These are Flat head screws

1.) Calendar Jumper
2.) Foil
3.)Hour Wheel
4.)Date Ring
5.)intermediate calendar wheel
6.)screw and Calendar wheel
7.)Calendar cam (under the calendar wheel)
8.)screw and Calendar cam spring (under the date ring)

3 screws and Keyless Cover

These are Cheese head screws

1.)minute wheel
2.)setting wheel
3.)setting yoke spring
4.)setting yoke
5.)setting lever
6.)sliding pinion
7.)winding pinion

Remove Cannon Pinion. I used the #1 Presto Hand puller

shock spring
cap jewel
Pierced jewel

Remove Shock spring, cap, and pierced jewel on the other side

Note: use tool made from pegwood

1.) 1 screw and wheel train bridge. Make note of the location of this screw.
2.) 3rd wheel
3.) 4th wheel (underneath)
4.) escape wheel (underneath)

1.) Second reduction gear for auto-wind
2.) 1 screw, seconds hand pinion spring, and seconds hand pinion
3.) 3 screws and winding bridge

1.) Center Wheel
2.) Winding barrel
3.)Crown wheel click post. Spring will be attached to winding bridge underside.
4.) Stem Release button
5.) 1 screw and balance assembly

1.) 1 screw and pallet lever bridge
2.) pallet lever

Boctok 2416b
Cleaning and Oiling notes
Dave Murphy

Cleaned in ultrasonic cleaner, in 3 beakers.
Cleaning: 2 cycles in L&R Extra Fine Watch Cleaning Solution
First Rinse: 1 cycle in L&R Ultrasonic Watch Rinsing Solution
Final Rinse: 1 cycle in L&R Ultrasonic Watch Rinsing Solution

1 load: Entire keyless, setting, and calendar works EXCEPT day ring
1 Load: Motion works
1 load; all plates and bridges
1 load: Balance assembly, alone

After final rinse:
Balance assembly, balance pierced and cap jewels, shock assemblies rinsed in "One Dip" hairspring cleaner.

Oiling strategy:

Moebius 9010 on low-load jeweled pivots
Moebius 9020 on medium-load jeweled pivots
Moebius D-5 on high-load jeweled pivots
Moebius 9415 on pallet stones
Moebius 8141 in the mainspring barrel
Moebius 8217 Braking grease on the mainspring barrel wall
PML Stem Grease for metal-to-metal sliding contact

Oiling amounts:
Using the black oiler,
Light = dipped to a depth 1/3 of the oiler's width.
Medium= dipped to a depth 2/3 of the oiler's width.
Heavy= dipped to a depth equal to the oiler's width.

Unless noted, use light to medium oiling on the black oiler.

Boctok 2416 Assembly and Oiling
Dave Murphy

Mainspring Barrel Wall in 2 places, 8217, yellow oiler, medium heavy

Arbor to Mainspring using pin vise (inset)
Wind spring into barrel

Barrel floor, 8141, yellow oiler medium-heavy
Mainspring coils, 8141, yellow oiler, medium heavy

Barrel cover

Barrel arbor, D5, (both sides) (inset)

Pallet Lever
Pallet lever bridge and 1 screw

Do not Lubricate the Pallet lever pivots.

Identification of wheels

Brass pin for crown wheel click post, PML
Area where crown wheel click post slides, PML

1.)Winding Bridge (this view is the underside)
2.) Crown Wheel Click post, so it pivots on the brass pin
3.) Crown wheel click post spring

Mainspring Barrel (inset)
Center Wheel (inset)
The Stem Release Button! (inset)

Winding bridge and 3 screws. The Crown wheel click post must pivot and spring back when it is assembled.

Center wheel jewels, D-5, (both sides)
Barrel Arbors, D-5 heavy, both sides

1.) Escape wheel (inset)
2.) 4th wheel (inset)
3.) 3rd wheel (inset)
4.) Second winding reduction wheel
5.) Wheel train Bridge and 2 screws (inset)

Escape wheel pivots 9010 both sides
4th wheel pivots 9010 both sides
3rd wheel pivots 9020 both sides
Second winding reduction wheel post, D-5

Seconds hand pinion

bearing surface, underside of seconds hand pinion spring, D-5
surface under click, 9010

seconds hand pinion spring and 1 screw
ratchet wheel and 1 screw
click spring
click and 1 screw
crown wheel

click post 9010
crown wheel post D-5

Left hand screw to crown wheel

Flip to the dial side of the movement.
Lubricate pallet stones, Light 9415, on impulse surfaces only. Access is through the 2 rectangular holes.

balance assembly, 1 screw

Lubricate cap jewel, medium heavy, to cover 1/2 to 2/3 of cap jewel (inset)

Assemble pierced jewel to cap jewel
assemble shock assemblies with pegwood tool.

At this point, movement should run. Put a screwdriver in the screw holding the ratchet wheel, and wind.

Ratchet wheel driving wheel (inset)
First winding Reduction Wheel (inset)
Auto-wind bridge and 3 screws
Both reversing wheels
Reversing wheels keeper and 1 screw

Posts for Reversing wheels, D-5
1 jewel in each reversing wheel, D-5
First winding reduction wheel jewels, D-5, both sides
Ratchet wheel driving wheel jewels, D-5, both sides

Stem pivot, PML
Stem clutch square, PML
Stem set lever notch, PML
Stem shoulder, PML

Sliding Clutch Pinion
Winding Pinion

Sliding Clutch pinion slot, PML
Sliding Clutch pinion Breguet teeth, PML
Winding Pinion Breguet teeth, PML

Seconds hand pinion, 9010
Center wheel post, D-5

Install Cannon pinion using pin vise

Lubricate with PML:
Stem Release button
Post for setting yoke
Post for minute wheel
Post for setting wheel

minute wheel
setting wheel
setting lever
setting yoke
setting yoke spring

Lubricate with PML:
"heel" of setting yoke
post on setting lever
side of setting lever where keyless cover springs against it
edge of setting lever where it touches the setting yoke

Keyless cover and 3 screws. (inset)
note: hook the cover spring on to the post on the setting lever

Lubricate outside of Cannon pinion, 9020

Lubricate with PML:
post for intermediate calendar wheel
under calendar cam
post for date ring jumper

Hour Wheel
Dial Foil (not shown)
intermediate calendar wheel
calendar cam
date ring jumper

Lubricate with PML:
top of calendar wheel
hub+shoulder of calendar wheel screw

date wheel jumper
calendar wheel with 1 screw
calendar cam spring and 1 screw

2 or 3 teeth of the date ring, PML

Date ring,
Calendar cover and 3 screws
calendar jumper spring

Dial screws
Movement spacer and 2 screws
Dial and hands
Rotor and 1 screw

rotor bearing, 9020
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Reactions: 5
1 - 2 of 2 Posts
Thank you for your good work ! :)
Why did you lubricate the third wheel with 9010 instead of d5 ? :)
1 - 2 of 2 Posts
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