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Electrical System
Up
TM-9-2350-238-20-2 Crane (CAB) Components Recovery Vehicle Full-Tracked: Light Armored M578 (
Next
Hydraulic  System  
TM
9-2350-238-20-2
1-9.
LOCATION
AND
DESCRIPTION
OF
MAJOR
COMPONENTS
(CONT).
warning switch opens at 9 to 13 psi (62 to
(7) T h e
instrument
and
switch
panels
90 kPa) on increasing pressure. When the
contain
the
switches,
indicator
lights,
and
switch is closed, a circuit is completed to
gages required for operation of the vehicle.
light
the
warning
light
and
cause
the
warning
Refer
to
TM
9-2350-238-10
for
description
of
horn to sound. The engine oil pressure trans-
the separate items on each panel.
mitter is a variable resistance unit. It gives a
reading on the engine oil pressure indicator.
(8) T h e r m a l
break,
automatic
reset,
The engine oil temperature warning switch
15-ampere and 20-ampere circuit breakers
closes
at
300F
to
310F
(149C
to
155C)
protect the vehicle components and circuits.
on increasing temperature. When the switch
is closed, a circuit is completed that causes
(9) The  service  headlamps  are  set  for
the
warning
light
to
light
and
the
warning
high or low beam by the dimmer switch. The
horn
to
sound.
The
transmission
oil
tempera-
two headlamps are combination units. Each
ture transmitter is a variable resistance unit. It
headlamp
consists
of
an
incandescent
driving
gives a reading on the transmission oil temp-
lamp, blackout driving lamp, and blackout
erature
indicator.
The
transmission
oil
pres-
marker
lamp.
The
taillights
are
combination
sure transmitter is a variable resistance unit.
units. The right taillight consists of a blackout
It gives a reading on the transmission oil pres-
stoplight
and
marker
light.
The
left
taillight
sure indicator. The fuel level transmitter is a
consists of a service taillight, service stop-
sparkproof, float-operated variable resistance
light,
and
blackout
marker
light.
The
dome
unit. It gives a reading on the fuel level
lights
are
a
standard
combination
blackout
indicator.
and service light. The flasher assembly turns
the flasher signal headlight on and off
repeatedly
when
the
FLASHER
SIGNAL
(11) Vehicle  components  are  connected
with single wire leads or multiple lead wiring
switch is in the ON position. Operation of the
harnesses.
All
wiring
is
standard
ordnance
flasher signal headlight is indicated by the in-
waterproof cable. Connections are made by
dicator
lamp
in
the
cab.
The
two
floodlights
waterproof, rubber, single wire quick-discon-
are
controlled
by
the
FLOODLIGHTS
switch
in
nect
connectors,
plug-receptacle,
connectors,
the cab.
or
solderless
waterproof
terminals.
All
leads
are identified by a marker band attached to
(10) When the brake foot pedal is de-
the
wire
and
stamped
with
a
circuit
number.
pressed,  the  brake  warning  sensitive  switch
The
socket
and
pin
contacts
of
the
connec-
roller guide is released, causing the switch
tors are identified by upper case letters of the
contacts
to
close.
Closing
the
switch
con-
alphabet, stamped on the connector insert.
tacts
causes
the
service
stoplight
or
blackout
stoplight to light. The engine low oil pressure
1-6

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