TM 9-1829A, April 1944
50/100
2021-07-07
c.
Replace oil wick and plug:
Saturate oil wick in watch and clock oil and place in frame. Using punch, tap oil
wick plug into place (fig. 67).
Figure 67: Replacing oil wick plug
d.
Replace second and third gears:
Lubricate gear teeth with small amount of No. 00 grease, O.D. Do not
overlubricate. Place second gear and third gears in position, and fasten with bracket and screw (fig. 54). Test
for free turning and end play (about 0.004 inch). End play can be adjusted by bending gear bracket.
e.
Replace front jewel and hair spring regulator (fig. 59):
Screw front jewel into bracket. Place hair spring
regulator in position and screw on front jewel nut, but do not tighten. Place tiny thrust washer over end of
speed cup staff, and place speed cup and staff in front jewel bracket. Temporarily place speed cup and front
jewel bracket in frame. Fasten rear jewel bracket in place. While holding front jewel bracket securely in place,
adjust front jewel, using adjuster (T-178705), allowing about 0.003 inch staff end play (fig. 68). Tighten
upper jewel nut securely, using
1
/
4
inch open-end wrench. Be sure hair spring regulator is in correct position
with slotted end toward odometer intermediate gear. Remove rear jewel bracket, allowing speed cup to be
lifted out of frame.
Figure 68: Adjusting front jewel, using special tool (T-178705)