ARMY TM 9-6115-604-12
NAVY NAVFAC P 8 633-12
4-129. MASTER (START/RUN/STOP) SWITCH S9 (16, Figure 2-1 ). MASTER SWITCH S9 Is used to start and stop
generator set operation. The switch is spring loaded to return to the RUN position after having been held In either the
START or STOP position.
a.
Test.
(1) Disconnect and tag leads from terminals 3 and 4
NOTE
Do not remove jumper across terminals 2 and 6.
(2) Using a multimeter set to RX1 scale with MASTER SWITCH S9 In RUN position, test for continuity across
terminals 1 and 2 and 5 and 6 Meter should Indicate zero ohm
(3) Hold MASTER SWITCH S9 in START position. Meter should indicate zero ohm across terminals 2 and 3
and 5 and 6.
(4) Hold MASTER SWITCH S9 in the STOP position. Meter should indicate zero ohm across terminals 1 and 2
and 4 and 5
(5) Connect leads to terminals 3 and 4 and discard tags.
(6) Replace MASTER switch S9 if It falls any of the continuity tests In steps (2) through (4), above.
b.
Remove See Figure 4-76
(1) Set MAINTENANCE LOCKOUT switch S100 to MAINTENANCE.
(2) Tag and disconnect wiring to MASTER SWITCH S9 (2).
(3) Remove locking nut and lockwasher to release MASTER SWITCH S9 (2) for removal from rear of panel.
c.
Install
(1) Install MASTER SWITCH S9 (2) from rear of cabinet C door.
(2) Secure from the front with lockwasher and locking nut.
(3) Connect wires and discard tags.
(4) Retest for proper operation per step a, above.
(5) Set MAINTENANCE LOCKOUT switch S100 to OPERATE
4-130. PANEL ILLUMINATION LIGHTS DS26 THROUGH DS29 (6, Figure 2-1). Panel lights illuminate engine control
panel for better visibility.
Dangerous voltage levels may be present at components located within cabinet C.
Observe all applicable safety precautions as outlined In Chapter 1, Section III, of
this manual.
a.
Test
(1) Apply 24 V dc to panel light holder contacts at rear of cabinet C door Each of the four panel lamps should
light.
(2) Replace inoperative lamps and repeat step (1), above If a known good replacement lamp falls to light,
replace panel light holder and retest.
b.
Remove. See Figure 4-76.
(1) Set MAINTENANCE LOCKOUT switch S100 to MAINTENANCE.
(2) Remove hood from panel light (3) and remove lamp (4) for replacement.
(3) Tag and disconnect wiring to panel light (3) and remove locking nut and lockwasher at rear of door panel.
Panel light (3) will slide out from the front.
4-192
