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TM 9-2320-279-20-1
Maintenance Procedures (Cent)
2-28. RADIO INTERFERENCE SUPPRESSION
CHECK
CHECK GROUND
BLOWER
WIRE CONNECTION
Suppression in the M977 series vehicles is accomplished by grounding straps, tooth-type washers,
shielded cables, and shielded crane electrical components. Use these suppression devices when necessary
to join critical parts, forming a complete electrical circuit, for conducting radio interference currents
directly to vehicle ground and away from antennas.
c. Blower motor used in the cab for heating/cooling/air circulation has built-in ground straps f or
attachment. Tooth-t ype washers are used whenever an interference suppression ground connection is
made.
CHECK
CHECK CABLES
GROUND
AND CONNECTIONS
ALTERNATOR/REGULATOR
STARTING MOTOR
d. Starting/charging system. The
has built-in interference suppressors to eliminate
brush noise. Starting motor ground strap and cables must be in good condition, not frayed or broken, and
all nuts securely tightened to ensure positive grounding. Scrape mating metal surfaces clean before
installing ground straps and cables.
2-338

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