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

28. GENERAL INSTRUCTIONS
a. When the reassembly procedure
includes the staking of rivets or similar
parts, all staking and riveting should be
done in the early stages of reassembly to
avoid damage to other parts. Be sure to
support the main casting solidly when
riveting or staking.
b. Parts which require lubrication are
listed in paragraph 2 (b). Lubricate
sparingly and wipe away excess lubricant
with a clean cloth. Use only the specified
lubricants. During assembly, place a drop
of oil in each tapped hole to facilitate
screw installation.
c. The following component assemblies
require no adjustment and can be
reassembled by reversing the disassembly
procedure.
Worm Gear Assembly, Figure 18
(Design 642 only).
Fire Shutter Assembly, Figure 17
(Design 642 only).
Aperture Plate Assembly, Figure 16.
Sprocket Guard Assembly, Figure 15.
Lens Carrier Assembly, Figure 14.
Lamphouse Assembly, Figure 8.
Lampholder Assembly, Figure 7.
29. REASSEMBLING THE BLOWER
(Figure 19)
Reassemble the blower in reverse
order of disassembly, noting the following
special precautions.
a. Insert the bearings (17) and washers
(16) into the housings and press the retaining
rings (15) in until they snap into the
ring grooves.
b. Install the collar (4) so that the
REASSEMBLY PROCEDURE
21
shaft (14) has a barely perceptible amount
of end play (0. 002 to 0. 005 inch).
c. After the blower housings have been
assembled with the eyelets, loosen the set
screw (12) through the blower opening and
shift the blower wheel (13) until it is
accurately centred between the inner surfaces
of the housings.
30. REASSEMBLING THE MECHANISM
(Figure 13)
Note - Items 1 to 17, 23 to 34, 37 and 38
are used only in Design 642 projectors.
When reassembling Design 641 projectors,
disregard all references to those parts.
a. (641 and 642). Press the bearing
(22) into the mechanism housing. Install
the bearing (41) onto the camshaft until it
is seated against the shoulder of the shaft.
Install the retaining ring (18) onto the
camshaft with the convex side of the ring
away from the bearing (41).
b. (642 only). Assemble the animation
clutch bracket parts (7 to 17). Attach the
clutch bracket assembly with screws (1
and 2) and washers (3). Install the shuttle
adjustment bracket (6), washer (5) and
round nut (4); then press down on the
bracket assembly with the fingers and
tighten the screws (1) and (2) securely.
c. (642 only). Assemble the bushings
(37) into each of the three holes in the
worm gear (34). Assemble the bearing
assembly (33) to the worm gear so that:
the ears of the bearing assembly are in
line with the notches in the worm gear.
Assemble the two shoulder pins (30) into
the bearing assembly. Insert the ears of
the clutch yoke (31) through the slots in the
bearing assembly, and press the pins (30)
in to engage the holes in the clutch yoke
ears. Install the spring (32) over the
protrusion of the clutch yoke and into the
hole in the bearing assembly. Assemble