TM11-6125-256-34
c Wiring and Sleeving Replacement When replacing
(2) Using resistance bridge ZM-4B/U
worn or damaged wiring and sleeving, use the old wiring
measure the resistance of windings A-G B-D,
and sleeving as guides for size and length
C-F Resistance should be between 0 1413
and 0 1627 ohm All readings must be within 2
percent of each other
g DC Stator Apply 300 volts ac, 60 Hz,
4-23. Reassembly
for 1 second between the shunt winding and
the yoke and between the series and shunt
windings
a Control Box Assembly (fig 4-6) Since the control
box assembly is basically an electronic assembly,
reassembly is limited to replacing damaged parts and
installing a repaired current relay assembly
a General
(1) When making wiring connections,
(1) Replace all ball bearings and brush assemblies at
refer to fig. 4-1 or 4-1.1 as applicable.
each overhaul New brushes must be run-in before the
(2) Attach current relay assembly SW1 (92, fig 4-6)
final test procedure (refer to paragraph 4-28)
using screws (93), and washers (94), and self-locking nuts
(95)
(2) Replace all electrical components having a
rating outside the tolerances specified in SECTION VI
with a suitable epoxy resin adhesive
(3) Replace all worn or damaged parts except where
a repair procedure is given and authorized
(4) For all soldering operations, use solder specified
in paragraph 4-22b(2)
b Soldering
b Voltage and Frequency Regulator Assembly
CAUTION
Repair of the voltage and frequency regulator assembly is
covered in SECTION IV
Do not use an acid core solder or an acid flux
Do not burn insulation during soldering
c Motor-Generator (fig FO-3) Refer to fig 4-1 when
(1) When soldering terminals (5 fig 4-8) of the dc
making motor-generator wiring connections Assemble
end bell lead assembly, use Eclipsaloy No 27 Grade 3
the motor-generator as follows
(The Bendix Corporation, Electric & Fluid Power
Division, Eatontown, N J) This solder consists of 15
percent silver, 80 percent copper, and 5 percent
(1) Install bearing springs (75, fig FO-3) into
phosphorus and has a melting range of 1200F (650C)
bearing liner of electrical rotating equipment housing
to 1300F (705C) (no Government equivalent
assembly (79)
specification available)
9, Grade 10 (The Bendix Corporation) This solder
consists of 63 percent tin and 37 percent lead, has a
numbers as those removed Heat ball bearings for one-
melting temperature of 357F (181C) and conforms to
half hour at 250F (121C) Support armature assembly
Military Specification MIL-S-6872
(77) and rotor assembly (78) with a suitable support
Position slingers (74) and, using a screwdriver press, a
swivel adapter and a bearing pusher, press ball bearings
remover (London Chemical Co) and blow dry with low-
(73) onto the inner ends of the armature and rotor shafts
pressure compressed air
Install retainer ring (72)
