TM 9-2330-390-14&P
4-21. ELECTRICAL GROUND POINTS.
Many electrical problems are the result of poor ground connections. You can ensure that ground
connections are good by performing the following steps:
When troubleshooting an electrical malfunction or performing electrical maintenance
on either dolly set lighting system or engine, disconnect either intervehicular cable or
battery negative (-) ground cable. Failure to do so may create a spark and electrical
shock, resulting in serious injury to personnel.
(1)
Remove hardware connecting ground cable terminal lug to ground point.
Dry cleaning solvent, P-D-680, is toxic and flammable. Always wear protective
goggles and gloves, and use only in a well-ventilated area. Avoid contact with skin,
eyes, and clothes, and DO NOT breathe vapors. DO NOT use near open flame or
excessive heat. The solvent’s flash point is 100°F-1380F (38°C-590C). It you
become dizzy while using cleaning solvent, immediately get fresh air and medical help.
if solvent contacts eyes, immediately wash your eyes and seek medical attention.
(2) Clean mounting hardware, ground cable terminal lugs, and ground point with dry cleaning solvent
(Item 27, Appendix F) and scrub brush (Item 3, Appendix F).
(3)
Remove any rust with wire brush (Item 4, Appendix F) and crocus cloth (Item 6, Appendix F).
(4)
Look for cracks, loose terminal lugs, and stripped threads. Replace any defective parts.
tight.
(5)
Install hardware connecting ground cable terminal lug to ground point. Ensure that all hardware is
4-22. LINES AND PORTS.
To keep dirt from contaminating systems when removing and installing air, hydraulic, fuel, and oil hoses and
lines, perform the following steps:
(1)
Clean fittings and surrounding area before disconnecting lines.
(2)
Cover, cap, plug, or tape lines and ports after disconnecting lines. When these are not available,
use hand-carved wooden plugs, clean rags (Item 25, Appendix F), duct tape (Item 30, Appendix F), or other similar
materials to prevent dirt from entering system.
(3)
Ensure that new and used parts are clean before installing.
(4)
Walt to remove cover, cap, plug, or tape from lines and ports until just before Installing lines.
4-12
