Table 5. Troubleshooting (Cont)
and for shorts.) (See figure 10.)
Plug connector not secure.
Indicator light il-
Tighten plug connector
motor does not run.
Open lead to motor. (Check for
Repair or replace wiring harness
Open lead in motor. (Check for
Worn motor brushes.
Repair or replace armature.
Open circuit in motor armature
or field winding. (Check
and ground-approx. 1.7 ohms)
Motor runs slowly.
Poor brush contact.
Insufficient or incorrect oil in
Commutator worn or dirty.
Lack of proper oil in reservoir.
Fill reservoir with proper oil
Pump is operating but
or pressure is produced.
Check valve stuck.
Replace instrument (paragraphs
Improperly adjusted relief
Tighten caps to prevent leakage.
Caps on connectors loose.
Defective selector valve.
Section V. RADIO INTERFERENCE SUPPRESSION
equipment is satisfactorily suppressed, there is no
quency range of 0.15 through 1000.0 megacycles
tion, or reduction to a minimum, of electrical
at a distance of 5 feet from the tester.
disturbances produced by operation of the equip-
ment. These electrical disturbances are composed
58. INTERFERENCE SUPPRESSION
partly of electrical waves in the radio frequency
range. They must be suppressed as they will in-
terfere with the proper operation of friendly
electric motor (2) and it provides a low resist-
radio and radar equipment, and can be detected
ance path to ground stray currents created by the
by an enemy with electronic devices to give an
arc of the motor brushes.
accurate location of the equipment. When the