2 drops of oil (PL SPECIAL) on the drive shaft
(4) Loosen the setscrew that secures the dog
and casing; wipe off the excess oil. Refer to item
trip arm assembly to the lead-screw shaft
10 in the lubrication chart.
and remove the dog trip arm assembly
from the shaft.
b. Equipment with Unsealed Bearings. Disas-
sembly of the drive shaft of equipment using un-
(5) Slide the bearing assemblies free of the
sealed bearings (earlier models) should be per-
shaft, remove the retaining plates, and
formed only by qualified personnel. Disassemble
clean the assemblies by flushing or by
as follows:
immersion in solvent (SD). The bear-
ings need not be removed from the
(1) Remove the motor from its mounting
mounting brackets for this operation.
posts (par. 139).
(2) Remove the clutch from the shaft (par.
(6) Dry with a clean, lint-free cloth. USe air
pressure, if available, to dry the interior
of the bearings. Repack the bearings
(3) Remove the retainer plate from the clutch
with grease (GL) as outlined in the chart
end of the shaft and the thrust plate from
the other end of the shaft.
in paragraph 135 and wipe off all excess
(4) The shaft and bearings will slide free of
grease.
the motor casing. Do not remove the
(7) Reassemble in the reverse order of dis-
assembly. Check all adjustments.
gear from the shaft.
(5) Clean the bearings and shaft by flushing
Note. When the dog trip arm assembly is
or by immersion in solvent (SD). Dry
finally positioned on the lead-screw shaft, the
secondary clutch dog latch should be in line
thoroughly with a clean, lint-free cloth.
with the keyway in the lead-screw shaft.
Use air pressure, if available, to dry the
interior of the bearings.
139. Motor
(6) Repack the bearings with grease (GL) in
Motors used in unmodified Facsimile Sets
accordance with the chart in paragraph
AN/TXC-1 and AN/TXC-1A use brushes on the
135. Wipe off the excess grease.
(7) Reassemble in the reverse order of dis-
starting motor and require cleaning and lubrica-
tion quarterly. Motors used in Facsimile Set
assembly, and make proper adjustments.
AN/TXC-1B, AN/TXC-1C, and AN/TXC-1D
have no brushes, and require cleaning and lubri-
a. Equipment with Sealed Bearings. Disassem-
cation semiannually.
bly of equipment with sealed bearings (later
a. Motors in Facsimile Sets AN/TXC-1 and
models) is not required for lubrication. Place 1 or
AN/TXC-1A. The following instructions are ap-
2 drops of oil (PL SPECIAL) on the shaft and
plicable to the motors which use brushes:
casing; wipe off the excess oil. Refer to item 11 in
(1) Disassembly. Disassemble as follows:
the lubrication chart.
(a) Remove the four screws that secure the
b. Equipmenti with Unsealed Bearings. Dis-
motor to the mounting posts.
assembly of the lead screw of equipment using un-
(b) If care is taken to avoid undue strain on
sealed bearings (earlier models) should be per-
the connecting leads, they need not be
formed only by qualified personnel. Disassemble
unsoldered.
as follows:
(c) Remove the four screws that secure the
(1) Remove the mounting screws that secure
bottom bell to the motor case and care-
the bearing brackets to the chassis base.
fully remove the bell. Be careful not
(2) Rotate the drum so that the clutch dog
to lose the thrust ball.
trip arm and dog latch are in a horizontal
(d) Carefully withdraw the rotor, rotating
position with relation to the chassis base.
it in a counterclockwise direction as it
is being withdrawn.
Release the secondary clutch dog latch.
(2) Cleaning. Clean as follows:
(3) Lift the entire lead-screw and drum as-
(a) Clean the exterior of the motor with a
sembly clear of the chassis. Be careful
dry, clean cloth. If necessary, slightly
not to damage the lead-screw threads or
dampen the cloth with solvent (SD).
to bend the shaft. Place the assembly
on a suitable bench for the balance of the
Be careful not to get any of the solvent
cleaning operation.
on the coils or windings. Dry all parts
