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Cleaning the Model
260
Movement
The best way to clean the Model 260 movement is to disassemble the movement
only to the point of removing the balance bridge and the balance wheel as-
sembly.
The movement should be placed in the watch cleaning machine ( includ-
ing ultrasonic baths), preferably on edge to insure proper drainage of the
'fluids.
The movement must be imm
e
rsed in two sets of rinsing fluid. The final rinsing
solution must be absolutely clean
.
After cleaning is completed, the movement
must be thoroughly dried.
The balance wheel assembly must be cleaned separately in order to prevent
damage to the balance staff points, the hairspring and the coil.
Other metal parts may be cleaned in the same manner as the movement.
Only standard watch cleaning solutions should be used in the above cleaning
procedures.
Caution must be exercised when cleaning cases, dials, hands, special rings, etc.
which may contain materials other than metal because paint, lacquer and plastic
finishes can be damaged by some standard watch cleaning
solutions.
For
lubrication instruc
t
ions see Page 260.7.
For reassembly instructions see Page 260 .9.
260.6
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