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8. Replacement of Casing Parts
8-1 Glass Replacement
Tool used
Mineral glass is used in models having water resistance up to
200 meters, and the glass can be replaced. Parts information
for the glass is contained in parts lists (P/L, P.P.L.). Glass is
indicated as “Glass & packing”.
The procedure for replacing the glass is as described below.
1) Have a new glass & packing available. (Fig. 8-1)
2) Remove the band, cover/back and module from the watch
leaving only the case/center ass'y.
3) Remove the old glass and packing/glass from the case.
Wipe the glass fit part of the case with cloth.
4) Place the case in the hand press. The lower pressing piece
of the hand press should be large enough to hold the pe-
riphery of the case, and large enough to that the case sits
level without tipping.
The upper pressing piece should be the same size or slightly
smaller than the periphery of the glass (so that it allows
press fitting to be performed around the outside edge of the
glass).
5) Install the new packing/glass in the case. The old packing/glass should not be reused since it
can cause defective water resistance and separation of the glass from the case.
6) Place the glass on the press fit portion of the case. When it is difficult to position the glass at this
time, temporarily fasten the glass to the case with cellophane tape to prevent it from moving.
7) Turn the handle of the hand press with the case and glass positioned as described above to press
fit the glass into the case. (Fig. 8-2)
When the upper pressing piece begins to make contact with the glass, turn the handle a little at a
time. Temporarily stop turning the handle and take the watch out of the hand press to check
that the glass is sitting level in the case. (If press fitting is continued until the glass is completely
press fit in the case, it will be impossible to correct the position of the glass if it is not sitting level in
the case. Always make sure to discontinue press fitting to check that the glass is level.)
8) If the glass is being press fit on an angle, place a piece of cloth or buckskin on the part of
the glass that is higher (the part that has been pressed in the least) and continue press fitting.
(Tilting of the glass is corrected since pressure is increased correspondingly by the presence of the
cloth or buckskin.)
9) When appears that the glass is being pressed in on an angle, press the glass in a little at a time
while interrupting press fitting to make sure that tilting has been corrected.
10)When the glass has been completely pressed in, check the quality of the fit visually and if there is
no problem, install the module and cover/back.
11)In the case of water-resistant watches, always make sure to perform the waterproof inspec-
tion after repair is completed.
NO.
Code No.
Tool name
1
1904 5153 HP-fingerstall (two set)
2
1901 9439 Buckskin
3
1901 9522 Hand press
Fig. 8-1
Fig. 8-2