housing. Insert the coupling bolts and
total eccentricity shown by the gage on
screw in until just snug.
the flywheel face in one complete
revolution. The total eccentricity should
(6)
Remove the fibre strips that were used to
not exceed .0005 inch.
support the armature.
(3) Support the armature on the lower main
(7)
Engage the frame and flywheel fits and
pole pieces by strips of fibre 3/32-inch
insert all frame bolts.
thick, so placed that they can be
(8)
Gradually tighten bolts, alternating
withdrawn from the generator as it is
between coupling and frame fits until all
assembled on the engine.
bolts are tight, taking precautions so that
(4) The generator should now be adjusted
fits enter without being forced.
until it is concentric with the engine shaft.
(9)
The generator frame and engine bell
The generator fan will now freely enter the
housing fit must not be pulled home by
engine bell housing.
the coupling bolts. The bell housing bolts
(5) Move the generator toward the engine
must be tightened at the same time that
until the coupling fits are just engaged but
the coupling bolts are being tightened.
with the frame free of the engine bell
Section VIII. AUXILIARY GENERATOR
72. General Data
74. Cleaning
Refer to paragraphs 65 through 71 for leaning
a. Operating Limits (Maximum)
details.
(1)
Safe rpm...................................................3,100
(2)
Volts ..............................................................40
(3)
Amperes........................................................50
75. Bearings
(4)
Shunt field amperes ........................................5
b. Brushes.
the housings and inner bearing cal)s. Refer to figure 5
(1)
Number of brush arms ....................................4
for lubrication instructions.
(2)
Brushes per arm..............................................1
(3)
Size of brushes (inches)............... 3/8 x 1 x 1
b. During assembly or overhaul. grease bearings
(4)
Brush tension (pounds) with full
as follows:
length brush .........................................1 to 1
(1) Refer to figure 13 for bearing assembly
(5)
Minimum radial length of carbon
details.
when worn (inches) ........................................1
c. Bearings.
(2) Completely pack all of the internal space
Type...................Railway Type Free Fit Ball Bearings
in the bearing with grease.
d. Normal Pole Bores at Center of Poles (inches).
(3) Fill the lower half of the housing grease
(1)
Main poles ................................................5.872
chambers with grease.
(2)
Commutating poles...................................5.872
e. Weights (Pounds)
76. Disassembly and Assembly
(1)
Complete armature, lbs .................................85
a. Disassembly and assembly details, also bearing
(2)
Complete generator, lbs ..............................200
f. Resistance of Windings (ohms at 25C.)
maintenance, will be similar to that discussed in
(1)
Armature...................................................0.110
(2)
Commutating field ....................................0.034
(3)
Shunt field ..................................................5.37
will be apparent from the drawing.
73. Description
77. Brushholders, Brushes and Commutator
This generator is a four-pole, direct-current,
For information on maintenance of brushholders,
commutating-pole, shunt-wound generator arranged for
brushes, commutator, etc., refer to paragraphs 78
self-ventilation by means of a fan at the rear end of the
armature. Shaft extensions are provided at each end.
366445-55-5
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