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TECHNICAL GUIDE
61 Second wheel pinion
• Lubricating
Lubricate the upper portion of the second wheel pinion as shown in the
illustration at right.
63 Complete barrel with mainspring
• Lubricating
It is not necessary to disassemble the complete barrel with mainspring. If it is disassembled for
cleaning purposes, lubricate 2 to 3 portions inside the barrel with SEIKO Watch Oil S-3.
65 Center wheel bridge
• Lubricating
Lubricate the first reverser idler of the center wheel bridge at the portion indicated in the illustration
below.
80 Main plate
• Lubricating
Lubricate the second reduction wheel at the portion indicated in the illustration below.
Lubricate the
two teeth.
12
<Top view>
<Top view>
Snap for first reverser idler
First reverser idler
<Top view>
Second reduction wheel
<Cross section>
<Cross section>
Snap for first reverser idler
First reverser idler
Center wheel bridge
<Cross section>
Second reduction wheel
Cal. 4S77A
Main plate
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