ARMY TM 9-6115-670-14&P
4-146
HERTZ METER
a. Refer to FO-1 (SICPS/WIN-T), or FO-7 (JTACS), and disconnect plug J2 from P2.
b. Remove electrical leads from meter by performing steps “a.”, “b.”, and “c.” of REPLACE procedure.
c. Measure resistance on terminals at rear of meter. Resistance reading should be 7.0 ohms +/- 1.0
ohms.
d. If meter reading is not within the specified resistance, replace meter.
DC AMPERES METER
a. Refer to FO-1 (SICPS/WIN-T), or FO-7 (JTACS), and disconnect plug J2 from P2.
b. Remove electrical leads from meter by performing steps “a.”, “b.”, and “c.” of REPLACE procedure.
c. Measure resistance on terminals at rear of meter. Resistance reading should be 50.0 ohms +/- 3
ohms.
d. If meter reading is not within the specified resistance, replace meter.
REPLACE
a. Remove ten screws (caged nuts (SICPS), machine screws (JTACS and WIN-T)) (1, Figure 4-45)
securing APU control unit cover to chassis and remove.
b. At rear of meter (2), identify and tag terminal leads (6).
c. For each terminal lead, remove nut, flat washer, and lock washer (5) from terminal (7). Remove
terminal leads (6).
NOTE
Use this procedure to replace A-C VOLT, A-C AMP,
HERTZ, and D-C AMP meters. Refer to FO-1
(SICPS/WIN-T) or F0-7 (JTACS) when replacing
electrical meters.
NOTE
Water temperature meter and hour meter have terminals.
