ARMY TM 9-6115-642-24
AIR FORCE TO 35C2-3-455-12
MARINE CORPS TM 09247A/09248A-24/2
2-57 CONTROL BOX TRAY.
2-57.1 Removal.
a.
Shut down generator set.
b. Open left side engine access door and disconnect negative battery cable.
c.
Remove control box top panel, paragraph 2-16.1.
d. Remove control panel, paragraph 2-54.2.
e.
Remove control panel frame, paragraph 2-55.1.
f.
Remove control box side panels, paragraph 2-56.2.
g.
Remove DC CONTROL POWER circuit breaker, paragraph 2-26.3; BATTERY CHARGER FUSE assembly,
paragraph 2-25.3; AC voltage regulator, paragraph 2-27.3; frequency transducer, paragraph 2-28.4; shunt,
paragraph 2-29.3; overvoltage relay, paragraph 2-30.3; short circuit/overload relay, paragraph 2-31.3; crank
disconnect switch, paragraph 2-32.3; relays, paragraph 2-33.3; and resistor-diode assembly, paragraph
2-34.3.
h. Contact next higher maintenance level to remove control box harness.
i.
Remove nuts (18, FIGURE 2-15), Iockwashers (19), washers (20), and control box tray (21) from generator
set.
j.
Remove bolts (22), washers (23), and nuts (24) from tray (21).
k. Remove screws (25) and controls bracket (26).
l.
Remove screws (28), nuts (27), and tracks (29). Drill out rivets (30) and remove voltage reconnection switch
plate (31).
2-57.2
Inspection.
a.
Inspect control box tray (21, FIGURE 2-15) for dents, cracks, loose paint, and corrosion.
b. Inspect for damaged and missing cage nuts (32).
2-57.3 Repair.
WARNING
a.
b.
c.
d.
2-57.4
a.
b.
c.
d.
e.
f.
Wear a protective mask and gloves when sanding CARC painted surfaces. CARC
paint dust is a health hazard and could cause personal injury if warning is not
followed.
Repair all dents and cracks, and remove all loose paint.
Remove light corrosion with fine grit abrasive paper (Item 15, Appendix C).
Repaint surface in accordance with TM 43-0139. (F) Refer to applicable directives.
Replace all missing or damaged cage nuts (32, FIGURE 2-15).
Installation.
Install voltage reconnection switch plate (31, FIGURE 2-15) with new rivets (30).
Install bolts (22), washers (23), and nuts (24) in control box tray (21).
Install tracks (29) and secure with screws (28) and nuts (27).
Install controls bracket (26) with screws (25).
Position control box tray (21) in generator set and install washers (20), lockwashers (19), and nuts (18).
Contact next higher maintenance level to install control box harness.
2-85
