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 TM 55-1905-217-34
(1)
Position the commutator end bearing assembly (1, fig. 4-8) to the frame and field assembly (3) and
secure with the six attaching screws (19) , plain washers (18) and lockwashers (17).
(2)
Place the spacer washer (8) and the middle bearing assembly (6) on the shaft of the armature
assembly (5).
(3)
Press the Bendix drive assembly (9) on the armature shaft and secure by tightening the setscrew;
then slide the retaining wire into place.
(4)
Position a new middle bearing gasket (7) on the motor drive housing assembly (10) and place over
the Bendix drive assembly. Secure to the middle bearing assembly with six screws (15) and
lockwashers (14). Secure screws (15) with a locking wire.
(5)
Place the brake shoe (20) on the armature shaft (brush end) and insert the armature assembly (5) in
the frame and field assembly (3).
(6)
Secure these subassemblies to the frame and field assembly with twelve bolts (11) , flat washers
(12) and lockwashers (13).
(7)
Install eight brush assemblies (13, fig. 4- 11).
(8)
Position the two field coil leads to the proper brush assemblies and secure the brushes with the eight
brush lead attaching screws (14, fig. 4-11) and lockwashers (15).
(9)
Slide cover band assembly (2, fig. 4-8) into position and secure by tightening the two cover band
bolts.
o. Test After Overhaul. Before any testing, perform thorough inspection of starting motor for proper
assembly, particularly electrical connections. Be sure sleeve bearings wicks and reservoirs have been
lubricated.
(1) No-load test. Connect the starting motor in series with four 6 volt 200 amp storage batteries, a
suitable variable resistor to control voltage, and an ammeter capable of reading several hundred
amperes. If an rpm indicator is available, read the armature rpm as well as the current draw with the
unit running free speed or no-load. The starting motor should meet the following specification:
Maximum current................................ ...... 90 amperes
Voltage................................ ........................ 23.3 vdc
Rpm (approx) ................................ ............... 8500
(2) Torque test. Torque testing equipment is required for conducting a stall torque test of the starting
motor. The torque developed, current drawn, and voltage are checked together. The starting motor
should meet the following specifications:
Maximum current................................ ..... 500 amperes
Voltage................................ ............................ 3.2
Minimum torque................................ ............ 22 lb ft
f. Installation. Install the starter motor. (TM 55-1905-217-12, para 4-50).
Section II. HYDRAULIC STARTING SYSTEM
4-4. General
A description of the hydraulic starting system is included in the Operator and Organizational Maintenance
Manual TM 55-1905-217-12.
4-5. Hydraulic Starting System Reservoirs
a. General. The reservoirs are mounted on the starboard side of the engine room as shown in figures 4-13 and
4-22
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