Alarm Buzzers - MCi MC8 Crusader Maintenance Manual

MAINTENANCE
Crusader
MC-8
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MANUAL
ALARM BUZZERS
DESCRIPTION
T~e alarm buzzer for the alarm system are moun-
ted m an external sealed junction box at the left hand
front below driver's window. The alarm buzzers for
the alarm system are Low Air, Hot Engine, Lavator)'
Emergency, Low Oil Level, Fire Alarm, Low Water,
Low Oil Pressure and A/C Hi-Low.
Note_: Activate each circuit during adjusting buzzer
for des1red so~nd. To increase sound, turn adjusting
screw clockwise; counter-clockwise to decrease.
Refer to Figuie 7-1 for adjusting screw.
The man_ufacturers specified range is between 65
and 75 decibels. The factory set range is 75 decibels.
ADJUSTING
SCREW
Figure 7-1: Alarm Buzzer Sound
Adjustment Location
HEADLIGHTS
DESCRIPTION
Headlights are d<_rnble filament "Sealed Beam" type
and are mounted m the front of the vehicle.
?wit,ch marked "Headlights" mounted in the
dnver s switch panel to the left of the driver controls
headlights. High or low headlight beam is selected by
means of a floor-mounted dimmer switch. When high
bean:is are on, a tell-tale light marked "Hi Beam" on
the instrument panel will glow.
MAINTENANCE
Clean with water and a good glass cleaner
whenever dirty.
For maximum illumination head lamps must not be
blackened and proper voltage must be maintained.
L?~ battery, loose or dirty electrical contacts in
wmng system and poor ground all contribute to a
decrease in voltage. Check wiring and connections
regularly and keep battery properly charged. When
headlamp burns out, a complete new sealed beam
unit must be installed.
REMOVAL
Remove bezel retammg screws and remove bezel.
Remove three screws which hold sealed beam unit in
housing. Pull unit out of housing. Disconnect plug-in
socket. Install new sealed beam unit reversing above
procedure.
HEADLIGHT ADJUSTMENT
Headlights must be aimed carefully and accurately
to assure safe vehicle operation at night. Adjustments
can be made quickly and accurately with a headlight
tester. However, if equipment is not available, make
adjustments as described below.
(A) Place vehicle on level floor so headlights are 25
feet from a smooth vertical surface preferably of
light color. A door or wall is suitable. Center line
of vehicle should be perpendicular to this ver-
tical surface.
(B) Draw a horizontal line on vertical surface at
height of light center. Locate point on this
horizontal line at which projected centerline of
vehicle intersects. Measure distance between
lamp centers and divide this distance equally on
either side of center mark. Then draw two ver-
tical lines directly ahead of each light center.
(C) Switch on high beam and cover one light ad-
justing other.
(D) Remove light bezel retaining screws and aim
light beam with adjusting screws. Top screw
provides horizontal adjustment.
(E) When aiming headlights, beam may appear
distorted. A new sealed beam unit must be in-
stalled to correct this condition.
(F) After headlight is properly aligned, cover its
beam and proceed in same manner as above with
opposite light.
GENERATOR
DESCRIPTION
The 24-volt generator, is a fan cooled, diode rec-
tified. brushless unit in which current-carrying con-
ductors are stationary. The only movable part is the
rotor, which is mounted on two ball bearings located
in the drive and frame. Rubbing seals are provided to
retain grease in the bearing reservoir. The generator
should be checked externally for grease leakage at
the drive end about every 100,000 miles after
300,000 miles have been accumulated.
The current-carrying conductors in the generator
are the field winding, the stator windings and six
diodes. The field winding assembly is attached to the
end frame by four attaching bolts. The stator win-
dings are assembled inside the laminations and stator
frame. and are connected electrically to the six
diodes which together comprise the rectifier. The