Sony BVW-55 Maintenance Manual page 279

5. GB(2) gear assembly replacement
(1) Push and remove both ends of the GB(2) gear
assembly from the back of the gear box
housing using tweezers.
(2) Remove the bearings from the shafts on both
ends of the removed GB(2) gear assembly.
(3) Clean the shafts on both ends of a new GB(2)
gear assembly with dry cloth.
(4) Install bearings in the shafts on both ends of
the GB(2) gear assembly.
(5) Apply grease thinly to the whole gear
circumference of the GB(2) gear assembly.
(6) Insert the GB(2) gear assembly from the top
of the gear box housing in the direction
shown in the figure, push both ends of the
assembly using tweezers, then install it
securely.
6. GB(1) gear assembly replacement
(1) Remove the GB(2) gear assembly. (Refer to
(1) in step 5 above.)
(2) Remove the GB(1) gear assembly from the
gear box housing.
(3) Replace the GB(1) gear assembly with a new
one.
(4) Insert the GB(1) gear assembly into the gear
box housing and install the GB(2) gear
assembly. (Refer to (6) in step 5 above.)
BVW-55 P2
Push then to remove using tweezers
GB(2) gear assembly
Shaft
GB(2) gear assembly
Bearing
4-2. Gear in Gear Box Replacement
Shaft
Bearing
GB(1) gear
assembly
4-7