RADIO INTERFERENCE SUPPRESSION-continued

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