T O 35C2-3-442-2
P-8-627-34
TM 5-6115 -457-34
TM-07464A-35
3 . D.C. ammeter (0 to 500 amp
to determine whether or not sanding opera-
scale).
tion is satisfactory. A satisfactorily seated
4. Carbon pile (0 to 600 amp
brush (56) should show evidence of contact
capacity).
on at least 85 percent of its length and 100
5. Spring scale (0 to 50 lb scale).
percent of its thickness.
6. Pony brake arm 12 inch long.
7 . Hand held tachometer -0-
7. Lift brushes (56) and remove
10,000 RPM.
sandpaper from armature (40) commutator.
CAUTION
WARNING
Never operate the
starter motor more
Compressed air used for cleaning and
than 30 seconds at
a time during test.
drying purposes can create airborne
Allow the motor to
cool for at least
particles that may enter the eyes.
2 minutes between
each crank cycle.
Pressure shall not exceed 30 psig.
Eye protection is required.
b. No load test.
8. Remove armature (40) from
frame and field assembly (53). Clean arma-
1. Connect no load current test set-
ture (40), brushes (56) and frame and field
up as shown in view A.
assembly (53). Blow out sanding dust using
compressed air.
2. Adjust carbon pile to obtain a
9. Coat shaft and splines on arma-
voltage of 22 volts. Current drain should
ture (40) with grease MIL-G-23827. Install
be 90 amperes (maximum) at 7000 RPM.
armature (40) (steps 1. and 2. above).
e. When assembling intermediate and
3. Apply rubber tip of hand held
pinion housing assemblies (2 and 34), torque
tachometer to end of shaft in drive housings
hex head screws (1) to 8 foot pounds. Make
to read RPM.
sure locating marks are aligned.
WARNING
4. If current is too high, check
bearing alignment end play. Two or three
Sealant, Glytal is moderately toxic
sharp raps with a rawhide hammer while
to eyes, skin and respiratory tract.
motoring will often help align bearings and
Eye and skin protection required.
f r e e armature.
Good general ventilation is norm-
ally adequate.
f. After assembly, the insulation on
c. SOLENOID WINDING TEST.
both terminal studs on frame and field as-
sembly (53) should be coated with glytal
1. Make solenoid winding test setup
sealant. Keep sealant off of contact sur-
as shown in view B.
faces of terminal studs and nuts.
8-28. TESTING. (See figure 8-8).
a. The following equipment will be re-
2. Test current draw and make
quired to perform the starter tests:
ground and open test on winding. Series
1. Two 12 volt batteries - 4 batteries
winding values at 7 0F should be 23.2 to
will be required if stall torque is to be per-
26.6 amperes at 12.9 volts. Shunt winding
formed.
values at 70 F should be 4.1 to 4.8 am-
2. D.C. voltmeter (0 to 50 volt
peres at 12.9 volts. Adjust carbon pile to
scale).
obtain 12.9 volts.
8-18
Change 8
