3-17
BVW-55 P2
6. Upper drum assembly installation
(1) Align the positioning hole of the upper drum
assembly shown in the figure with the
positioning pin of the lower drum, and put the
upper drum assembly on the lower drum. At
that time, confirm that the positioning pin
protrudes from the upper surface of the upper
drum.
n
Hold the upper drum assembly in the portion
where the video heads does not exist. Take
care that the video heads does not contact
with the brush post and its peripheral parts
when the upper drum assembly is installed.
Put the upper drum assembly on the lower
drum, and never push the outer circumferen-
tial part of the drum by hands.
(2) Push the center part of the upper drum with
fingers just downward and bring the upper
drum in contact with the flange of the lower
drum.
(3) In the state in step (2), fix the four screws
tentatively in the order shown in the figure at
the torque below.
[Tightening torque: 10
x
10
_
2
N
.
m
{1.0 kgf
.
cm}]
(4) Tighten the four screws at the torque below.
[Tightening torque: 25
x
10
_
2
N
.
m
{2.5 kgf
.
cm}]
3-2. Upper Drum Assembly Replacement
Upper drum assembly
Brush post
Positioning hole
Positioning pin
Upper drum fixing screws
Upper drum assembly
1
4
3
2
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