Tightening Torque And Washer - Sony BVW-55 Maintenance Manual

3-1-5. Tightening Torque and Washer

1. Tightening torque and screwdriver
This model uses many M1.4 and M2 screws.
Be sure to use the specified tool when loosening or tightening these screws.
Use a torque screwdriver and tighten the screws with the specified tightening torque.
Torque screwdriver bit (for M1.4):
Torque screwdriver bit (for M2):
Hexagon bit (Across flat has 1.5 mm): J-6326-120-A
Torque screwdriver (for 3 kg):
Tightening torque
For M1.4 screw:
For M2 screw:
Reference
This model uses small-sized screws. Be careful not to drop these screws in the unit during removal and
reinstallation. We recommend to magnetize the screwdriver bit to prevent that the screws drop.
2. Stop washer and E ring
Do not re-use the stop washer and E ring after removing them. Be sure to use a new stop washer and E
ring when installing parts.
Stop washer: 3-559-408-11
E ring(2.3): 7-624-105-04
Removing the stop washer and E ring
Remove the stop washer and E ring using small pliers or tweezers.
m
. Be careful not to drop the stop washer and E ring in the unit.
. Take care that the tool does not touch other parts, especially, the drum.
Installing the stop washer
It is recommended to use the tool below when installing the stop washer.
Stop washer fastening tool: J-6323-530-A
(1) Insert a stop washer into the thin tip of a stop
washer fastening tool.
(2) Put the thin tip of the tool on the top of the
shaft to be installed in a upright position.
(3) Push the tool downward and install the stop
washer to the shaft.
BVW-55 P2
J-6325-110-A
J-6325-380-A
J-6325-400-A
9 x 10 _2 N.m (0.9 kgf.cm)
20 x 10 _2
N.m (2.0 kgf.cm)
3-1. General Information on Parts Replacement and Alignment
Stop washer fastening tool
Stop washer
Stop washer
3-7