TM 9-1829A, April 1944
48/100
2021-07-07
i.
Remove odometer intermediate gear (fig. 63):
It is necessary to remove this gear only when it must be
replaced. File off outside end of intermediate gear shaft, and pry off gear (with screwdriver).
Figure 63: Staking intermediate gear, using fixture (T-178717)
j.
Remove oil wick:
Using punch, remove oil wick plug from frame (fig. 64). Then lift oil wick out of frame
(using tweezers).
Figure 64: Removing oil wick plug
30. Cleaning, inspection, and repair of parts
a.
General cleaning:
Thoroughly clean hair spring, speed cup, second gear, third gear, frame, brackets, screws,
and metal washers with brush (T-170755) and dry-cleaning solvent. Make sure to remove every trace of
grease, dirt, and lint so that any defects will be easily found. Carefully dry parts with compressed air. Wipe
other parts clean with a rag.
b.
Front and rear jewels:
Sharpen a match or orange stick to a fine point and use for cleaning jewels. Using
jeweler’s eyepiece, inspect jewels closely to see that they are not cracked or broken. If defective, they must
be replaced. A special process synthetic jewel is used in Stewart-Warner instruments which must not under
any circumstances be lubricated, as oil in jewels will cause erratic operation of unit.
c.
Speed cup and staff:
If the ends of the staff are oxidized or tarnished and cannot be readily cleaned to a
bright finish, replace the speed cup and staff assembly. Using jeweler’s eyepiece, inspect ends of staff for
wear. If badly worn, replace assembly. Hold ends of staff between thumb and forefinger, and spin cup to see
that it runs true and is not bent or otherwise damaged. Note: This assembly must be handled very carefully to
prevent its being thrown out of balance, out of line, etc.