varnish which meets Military Specification MIL-V-
Wire size . . . . . . . . . . . . . . . . . No. 17 AWG
Wire type . . . . . . . . . . . . . . . Copper. Type T, heavy
173. Allow coil to air-dry at a temperature of
synthetic resin-coated per
70 F, for 15 minutes.
Military Specification
(7) DC welder excitation field windings.
MIL-W-683A
Number of coils . . . . . . . . . . . .2
Winding type . . . . . . . . . . . . . Wave
Turns per coil . . . . . . . . . . . . . . . . 1500
(4) Treatment schedule of armature. T h e
Wire size . . . . . . . . . . . . . . . . . . . No. 17 AWG
following baking treatment should be accomplished
Type
of
winding
Random
in a recirculating, forced-exhaust type bake oven.
NOTE: If field is larger because of random condition, a
B a k i n g times and temperatures may vary
maximum of 40 turns may be removed.
d e p e n d i n g on the recommendations of the
manufacturer of the varnish being used.
(a) Preparation. Mask both commutators,
(8) DC exciter shunt field winding.
the sliprings, and the shaft with a suitable masking
Number of coils . . . . . . . . . . .4
tape to prevent adherence of varnish to these parts.
Turns per coil . . . . . . . . . . .1400
(h) Dipping and draining. Immerse the
armature in varnish, Military Specification MIL-V-
Type of winding . . . . . . . . . . . Random
Wire size . . . . . . . . . . . . . . . . . . . No. 21 AWG
1137A, Type AN, grade CB, for 3 minutes.
Type of wire Copper . . . . . . . . . . . . . . . Type T, heavy
Remove and drain for 10 minutes. Rotate armature
synthetic resin-coated per
to prevent puddling of varnish.
Military Specification
(c) Wiping. Remove masking tape. Wipe
MIL-W-583A
previously masked surfaces with cloth dampened
(9) Treatment schedule for the DC welder
with an approved cleaning solvent to clean these
excitation field and the DC exciter shunt field. The
surfaces of any trace of varnish.
following baking treatment should be accomplished
(d) Baking. Bake for 1 hours at 320 F.
in a recirculating, forced-exhaust type bake oven.
(e) Second treatment. Remove from oven
Baking times and temperatures may vary with the
and allow armature to cool to approximately
recommendations of the manufacture of the varnish
140 F. Repeat (a) through (c) above, but with a
being used.
baking time of 4 hours at 320 F.
(a) Dipping and draining. Immerse the coil
(f) Fungicidal treatment. Allow armature
in varnish which meets Military Specification MIL-
to cool to ambient temperature. Repeat (a) above.
V-1137A, Type AN, grade CB for 3 minutes.
Immerse in a fungicidal varnish which meets
Remove and drain for 10 minutes. Rotate coil
Military
Specification
MIL-V-173.
Repeat
during drainage to prevent varnish from puddling.
(c) above and allow armature to air-dry for 15
(b) Baking. Bake the coil for 1 hours at a
minutes at a temperature of 70 F.
temperature of 320 F.
(5) DC welder commutation winding.
(c) Fungicidal treatment. Allow the coil to
Numbrer of coils . . . . . . . . . . .. 4
cool to ambient temperature. Immerse in a
Turns per coil . . . . . . . . . . . . . . . .15
f u n g i c i d a l varnish which meets Military
Type of wire . . . . . . . . . . . . . . . . Copper, Type T. heavy
Specification MI L-V-1 73. Allow coil to air-dry at a
synthetic resin-coated per
temperature of 70 F, for 15 minutes.
Military Specification
MIL-W-.583A
Type of winding . . . . . . . . . . Edge Wound
Number of poles . . . . . . . . . . .4
Number of slots . . . . . . . . . 48
(6) Treatment schedule for interpole wind-
Number of coils . . . . . . . . . . . . . 48
ing. The following baking treatment should be
Coil span . . . . . . . . . . . . . . . . 1-12
accomplished in a recirculating, forced-exhaust
Turns per coil . . . . . . . . . .10
type bake oven. Baking times and temperatures
Wire size . . . . . . . . . . . . . . . . No. 15 AWG
Type of wire . . . . . . . . . . . . . . . HNF(heavy, nylon, flat
may vary depending on the recommendations of the
band metallic armor)
manufacturer of the varnish being used.
(a) Dipping and draining. Dip the coil in
(11) Treatment schedule for the motor-
and out of the varnish which meets Military
a l t e r n a t o r windings. The following baking
Specification MIL-V-1137A, Type AN, grade CB.
treatment should be accomplished in a recir-
Drain for 10 minutes. Rotate the coil to prevent
culating, forced-exhaust type bake oven. Baking
times and temperatures may vary with the
puddling of the varnish.
recommendations of the manufacturer of the
(b) Baking. Bake the coil for 1 hours at a
temperature of 320 F.
varnish being used.
(c) Furtgicidal treatment. Allow coil to cool
(a) Preheating. Preheat stator assembly for
to ambient temperature. Immerse in a fungicidal
1 hour at a temperature of 140 F.
1-2