TM 5-3895-369-14
b .
Cleaning/Inspection.
Drycleaning solvent (P-D-680) is TOXIC and flammable. Wear protective goggles and gloves; use
only in a well-ventilated area; avoid contact with skin, eyes, and clothes and do not breathe vapors.
Keep away from heat of flame. Never smoke when using solvent; the flash point for type I
drycleaning solvent is 100°F (38°C) and for type II is 140°F (60°C). Failure to do so may result in
injury or death to personnel.
If personnel become dizzy while using cleaning solvent, immediately get fresh air and medical help.
If solvent contacts skin or clothes, flush with cold water.
If solvent contacts eyes, immediately flush
eyes with water and get immediate medical attention.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
Clean all metal parts in drycleaning solvent except armature, field coil, and starter drive.
Clean starter drive with clean dry cloth.
Check field frame for cracks, breaks, or other obvious damage.
Check armature shaft for rough surfaces or damaged, splices. Clean with No. 240 grit emery paper.
Check commutator contact surface for rough surface, pits, scoring, burns, hard carbon, oil coat, and
out-of-round.
Check brushes for wear, distortion, or discoloration.
Check brush springs for distortion.
Check splines and gear teeth on starter drive for damage.
Check bushings for damage or wear. If inside diameter of bushings is more than 0.005 inches (0.127 mm)
larger than shaft diameter, replace bushings.
Replace unserviceable parts.
c.
Testing.
(1)
Check armature for short circuits, opens, and grounds as follows:
(a)
Short circuits. Short circuits are located by rotating armature in growler with steel strip held on
armature. Steel strip will vibrate on area of short circuit. Shorts between bars are sometimes
produced by brush dust or copper between bars.
(b)
Opens. Checking points where conductors are joined to commutator for loose connections
causing arching and burning of commutator. If bars are not badly burned, leads to riser
bars can be resoldered.
(c)
Grounds. Grounds in armature can be detected by use of test lamp. If lamp lights when one test
prod is placed on commutator and other test prod on armature core or shaft, armature is grounded.
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