Bell & Howell - Projector - Filmosound 641 - 642 ... - Cine Information

gear; then hold the spring in this position
and switch the knob to the SILENT setting.
g. Hold the lens carrier (4) between
the hinge bosses of the mechanism housing.
Insert the washers (Z) and (3) between the
lens carrier hinge ears and mechanism
housing hinge bosses and press the hinge
pins (1) into place. The lens carrier
catch installed in paragraph 32, step v b'9
must be adjusted as necessary to permit
the lens carrier to be opened freely; yet
must hold the carrier firmly against the
stop screw (19, Figure 11) in the closed
position.
34. REASSEMBLING THE SOUND HEAD
(Figure 9)
Reassemble the sound head parts in
reverse order of disassembly, noting the
following special precautions.
a.. Apply a light film of oil to all roller
shafts before installing the rollers. Do
not over-lubricate.
b» Assemble the light pipe (24), retainer
(23) and sound drum shaft (22)
loosely before inserting the shaft into the
sound head housing. The set screw (20)
bears against the retainer (23), while two
set screws (21) secure the sound drum shaft.
c. Refer to paragraph 49 for all sound
head adjustments to be performed.
35. REASSEMBLING REAR REEL ARM
(Figure 6)
Reassemble the rear reel arm parts
in reverse order of disassembly, noting
the following special precautions.
a. Make certain that all gear teeth are
meshing properly (without binding, but with
no obvious looseness).
b. Lubricate all gear teeth sparingly
with grease, and check the gear action
before installing the reel arm cover, (9).
25
36. REASSEMBLING FRONT REEL ARM
(Figure 5)
Reassemble the front reel arm parts
in the reverse order of disassembly,
noting the following special precautions.
a. Make certain that all gear teeth are
meshing properly (without binding, but with
no obvious looseness).
b. Lubricate the gear teeth sparingly
with grease, and check the gear action and
clutching action before installing the reel
arm cover (3).
37. REASSEMBLING THE PROJECTOR
(Figure 4)
Reassemble Figure 4 parts in the
reverse order- of disassembly, except as
noted in the following special precautions.
a. When reassembling the transformer
(14) and amplifier (25) it should be noted
that the various leads should be connected
to the tag boards by matching the colours.
b. After the tilt mechanism is installed,
rotate the knob (30) to retract the tilt
bar (18) up against the base.
c. Do not tighten the blower screws (8)
until the rear mechanism plate parts are
assembled and the blower pulley can be
aligned with the motor pulley.
38. REASSEMBLING THE PROJECTOR
(Figure 3)
Reassemble Figure 3 parts in the
reverse order of disassembly, noting the
following special precautions.
a. Slip one ear of the bracket (44) onto
the belt shifter (51). Position the stop (55)
between the ears of the bracket (44) so that
the set screw (54) is accessible through
the centre hole in the bracket. Assemble
the stop and bracket onto the belt shifter.
Then assemble the bar bracket (53) to the
belt shifter and tighten the set screw (52)