TM 9-2350-230-12
Malfunction
Probable cause
Corrective action
COMMANDER'S CUPOLA
M551A1 ONLY - Continued
81.5
Cupola mag-
Inoperative speed
Notify support main-
netic clutch en-
switch in drive
tenance.
gages too soon, not
motor.
letting drive motor
slow down.
81.6
Cupola drive
Motor oil seals
Notify support main-
motor burns up
leaking
tenance to replace
drive motor.
81.7
CUPOLA ALIGN
Bad contact in
Inspect electrical
switch inoperative
electrical con-
connectors for
nector or defec-
bent or broken
tive wiring
pins, loose con-
harness
nections, dirt or
moisture in con-
nectors, or damage
to wiring harness.
Notify support
maintenance.
81.8
Cupola drive
Defective relay
Replace resistor box
motor runs at slow
in resistor box
assembly (fig 10-
speed only
35.4).
81.9 Cupola stops
Defective resistor
Replace resistor box
before reaching
in resistor box
assembly (fig 10-
front position dur-
35.4).
ing automatic align
cycle.
81.10 Automatic
Defective relay
Replace cupola (re-
align cycle stops
lay) control box
when align switch
control box
(fig 10-33).
is released.
a Replace cupola/
81.11 Automatic
a Defective align/
cupola align func-
stop switch in
laser control box
tion does not work
cupola laser
assembly (fig 10-
control box
35.2).
b Replace cupola
control box
box (fig 10-33).
8-32.1