Oiling Recommended; The Day And Date Mechanism; Type; Setting The Day And Date - Bulova 11 ANAC Technical Bulletin

Oiling recommended
1. Winding mechanism
2. Setting wheel posts
3. Minute wheel pivot
4. Cannon pinion of the large
driving wheel (94 A)
5. Gear train
6. Barrel arbor
7. Post of connecting wheel for
auxiliary reverser (317)
8. Crown wheel post
9. Teeth of both reversing
gears (317 C - 317 D)
10. Automatic train
11. Pallet stones
12. Balance wheel
13. Oscillating weight arbor (322)
and gib (343)
14. Post of intermediate date
wheel (581)
15. Post of date indicator driving
wheel (574)
16. Post of intermediate day
wheel (609)
17. Date indicator driving stop pin
(see fig. 3)
18. Function of date jumper (596)
19. Function of day jumper (586)
20. Day star (591)
21. Pin of date indicator driving
wheel (574)
NOTE: The cannon pinion (94 A) turning
on the center stud (106 C), the pivots
of the pallet (57) and the pivoting posts
of the day and date jumpers (586 and
596) require no lubrication.
The day and date
mechanism
Type
This movement is equipped with an
«instant date change" mechanism,
which means that the date indicator
jumps instantly at midnight, while the
day disk starts moving slowly at about
10 p. m., to change to the next day at
approximately midnight.
Disassembling and reassembling
Because of the 'simplicity of the system,
disassembly and reassembly of the day
and date mechanism can be done
without any difficulty. However, to set
the day star with dial disk (591) when
reassembling the day and date mecha-
nisms, it is important, to eliminate
damage of the finger of the date indi-
cator driving wheel (574), to proceed as
follows:
1. Make sure that the finger of the date
indicator driving wheel (574) does not
interfere with the teeth of the inter-
Moebius
8300
8300
8300
8030
9010
8030
Figure 7
The day and date mechanism
The date indicator driving wheel finger
8300
8300
8300
8030
941
9010
8300
8300
Figure
6
The calendar mechanism
8300
8300
8030
8030
8030
8030
8030
mediary day wheel (609) but is
positioned on the other side, as
shown in figure 7.
2. Keep slight pressure on the day dial
disk (591) and with the aid of a
pointed tool, through the hole, pull
the day jumper (586) backwards
(against the stem) in order to set it
between two teeth of the day star.
NOTE: Should the calendar jump two
days instead of one, check and if
necessary increase the tension of the
date jumper spring (578).
Checking the movement in the
case
1. After fitting the movement into the
case, make certain the oscillating
weight functions normally with no
contact against the back of the case.
2. By turning the winding crown, make
sure that the day and date indicators
jump correctly at approximately
12 o'clock (midnight).
4
Setting the day and date
1. Set the day by turning the hands
clockwise or counter-clockwise until
the right day appears in the dial
aperture.
2. Set the date by moving the hands
back and forth between 12 o'clock
(midnight) and 8 o'clock until the
desired date is reached.
(Each time, the day will turn back
and return again to the correct day).
NOTE: To advance the date without
changing the day after months having
less than 31 days, turn the hands back-
wards to 8 o'clock (20.00 hours) and
then advance them again until the pro-
per date of the following month appears.
3. Set the time by turning the hands
forward to correct time.
NOTE: If the time of day is afternoon
(p. m.) continue to turn hands past
12 o'clock noon before stopping at the
correct time. This action assures proper
day and date advance in relation to
time-of-day hands.