(2) Remove the frame, lens, lens clips, lens gasket and the bulb.
(3) Remove the four nuts, lockwashers, and the machine screws securing the back plate to the frame.
Remove the back plate assembly and the body pad from the skirting.
c. Cleaning, Inspection, and Repair.
(1) Clean all metal parts with an approved cleaning solvent. Dry thoroughly.
(2) Wash the lens with soap and warm water, and rinse thoroughly. If the lens is not cracked or
chipped, polish with a soft, lint-free cloth. Replace a cracked or chipped lens.
(3) Inspect the backplate and the frame for dents, corrosion, or other damage and replace if necessary.
(4) Check the socket for corrosion. Repair or replace as necessary.
(5) Inspect the electrical leads for cracked, frayed or oil-soaked insulation and replace if damaged.
(6) Check all hardware and replace any that is damaged.
d. Reassembly and Installation.
(1) Install the wire assembly in the front of the back plate with the rubber nipple over the wire assembly
protruding from the rear of the back plate.
(2) With the body pad properly positioned secure the back plate to the frame with the four machine
(3) Install the bulb, lens gasket, the lens and the body. Seea above.
(4) Connect the electrical leads to the marker lamp and remove the identification tags.
a. Removal. Remove the screw securing the reflector (7, fig. 2) to
the water distributor.
b. Cleaning and Inspection.
(1) Clean all parts in an approved cleaning solvent.
(2) Inspect for cracks, breaks, worn gasket, or other damage, and replace as necessary.
c. Installation. Position the reflector (7) on the water distributor and secure with screw.
Section IX. CONTROLS AND INSTRUMENTS
95. Description
The engine control and instrument system is comprised of the high temperature safety switch, starter switch,
magneto stop switch and wire, low oil pressure shutoff switch. The distributor control and instrument system is
comprised of the bitumeter assembly. water tank level gage, water discharge pressure gage, and the signal
gongs.
96. Starter Switch
a. Description. The starter switch is a spring loaded, push-type switch. Pushing the button completes an
electrical circuit from the battery to the starter. Because the switch is a one-piece unit, it must be
replaced if defective.
b. Testing. If the starter motor fails to operate, short the switch by placing a screwdriver across the
terminals (15, fig. 19) at the back of the starter switch (3). If the starter motor operates, the switch is
defective and must be replaced.
c. Removal.
(1) Remove the battery cable, and the starter cable (2) from the terminals (15) on the back of the
starter switch.
(2) Remove the two bolts (4), nuts (6) and lockwashers (5) holding the starter switch to the front panel
and remove the switch.
d. Installation. Position the starter switch in the engine front panel mounting hole and secure with two bolts
(4), nuts (6) and lockwashers (5).
97. High Temperature Safety Switch
a. Description. The high temperature safety switch is a temperature sensing unit that shuts off an
overheating engine automatically. The
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