TECHNICAL GUIDE
Cal. 4R15A/4R15B/4R16A/4R16B
14/19
• Lubricating
ws
SeCOND ReDUCtiON WHeeL
Lubricate the SeCOND ReDUCtiON WHeeL.
Refer to the right figure.
eh
FiRSt ReDUCtiON WHeeL
Liberally lubricate the FiRSt ReDUCtiON WHeeL.
Refer to the right figure.
ek
FiRSt ReDUCtiON WHeeL HOLDeR
w;
OSCiLLAtiNg WeigHt
When fixing the OSCiLLAtiNg WeigHt, an alignment with the FiRSt ReDUCtiON WHeeL is necessary
in order to wind the MAiNSPRiNg most efficiently. Rotate the FiRSt ReDUCtiON WHeeL manually until
its hole aligns with the gilt dot on the BALANCe COCK and set the OSCiLLAtiNg WeigHt vertically at
the stem side, and then tighten the screw. Refer to the figure below.
●
Winding mechanism
First reduction wheel
First reduction wheel holder
Barrel and train wheel bridge (back side)
35
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38
36
Balance cock guide pin
First reduction wheel
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