TM 11-6720-242-35
4-56. Removal and Replacement of the Gasket
428 (3) Catch the spring (15) as the pivot arm is
withdrawn.
(fig. 3-16 (2))
b. Replacement. Being sure that the spring (15) is
a. Removal. Remove the cover (18) by removing the
installed properly, replace the pivot arm (11) in the
six screws (20). Pull the gasket (19) free from the cover
reverse order of removal.
(18).
b. Replacement.
4-59. Removal and Replacement of Keeper Rollers
(1) Clean the cover (18), thoroughly, using methyl ethyl
keytone (MEK).
a. Removal.
NOTE
Be sure the holes in the gasket
(1) Remove the keeper block assembly (para 3-41).
match the cover holes before
(2) Remove any of the eight keeper rollers (3) by
cementing the gasket in place.
removing the appropriate retaining ring (2).
b. Replacement. Replace the keeper rollers (3) in the
reverse order of removal.
(2) Apply adhesive to the cleaned surface of the cover
and the correct surface of the gasket; let them stand
4-60. Removal and Replacement of Film Guides
until the adhesive is slightly tacky to the touch.
(3) Being careful to line up the holes, place the gasket
on the cover and press thoroughly.
a. Removal.
4-57. Removal and Replacement of Keeper Arms
(1) Remove the pressure plate assembly (para 3-40).
(2) Remove the film guide (1) by removing the two
screws (2) or film guide (4) by removing two screws (5).
a. Removal.
(3) Remove pins (3) or (6).
b. Replacement.
(1) Remove the pressure plate assembly (para 3-40).
(2) Remove the keeper block assembly (para 3-41).
NOTE
(3) Remove the keeper arms (22 or 23) by removing
The top edge of the film guide must
the appropriate pins (21).
be parallel to the top surface of the
b. Replacement.
pressure plate (14). The dimension
(1) Be sure that the keeper arm (22 or 23) is properly
between the two surfaces must be
oriented when placing it in position on the keeper block
0.027 inch.
(24).
(2) From the outside, insert the pins (21) in their holes
and partially press them in.
(1) Secure the film guide (1) or (4) using the two screws
(3) When assured that the keeper arm swings freely,
(2) or (5).
press in the pins fully leaving 0.06 inch protruding on the
(2) Pin the film guide to the pressure plate.
outside.
4-61. Removal and Replacement of Adas Pressure
4-58. Removal and Replacement of Pivot Arm
Plate
a. Removal.
a. Removal.
(1) Remove the keeper block assembly (para 3-41).
(1) Remove the pressure plate assembly (para 3-40).
(2) Remove the retaining ring (9).
NOTE
(3) Withdraw the pin (8) and catch washer (10), tension
Before proceeding to the next step,
spring washer (11), washer (12), and the spring (13) as
carefully note the position and
the pin (8) is withdrawn.
orientation of the spring (15).
(4) Remove the adas pressure plate (7).
b. Replacement.
(1) Replace the adas pressure plate (7) in the reverse
(2) Remove the pivot arm (11) by removing the
order of removal and the following special procedure.
retaining ring (13) and the shim (14).
4-28
