Figure 4-12. Carburetor and solenoid valve, exploded view.
(6) Pull the fuel heater (7) from the nozzle end of
spec. P-D-680) used to clean parts is
potentially dangerous to personnel
(7) Remove the screw (8) and lock washer (9) secur-
and property. Do not use near open
ing the solenoid cap (10) to the carburetor. Push the
flame or excessive heat. Flash point of
grommet (11) from the slot in the cap to free the
solvent is 100°F (38°C).
solenoid lead. Remove the solenoid cap and the washer
(1) Clean metal parts in dry cleaning solvent (fed.
(12), and remove the solenoid coil (13) and coil housing
spec. P-D-680) and allow parts to dry thoroughly before
(14) from the carburetor. Remove the preformed pack-
reassembly. Do not immerse the thermostat, solenoid
ing (6) from the burner end of the carburetor,
coil, or carburetor in solvent.
c. Cleaning and Inspection.
(2) Inspect the fuel adjustment needle tip for wear,
scoring, or other damage. Replace the fuel adjustment
needle if the needle is bent or damaged.
Clean parts in a well-ventilated area.
(3) Test the preheat thermostat for continuity. The
Avoid inhalation of solvent fumes and
thermostat contacts must be open (no continuity) at
prolonged exposure of skin to cleaning
temperature of 55° ± 6°F (9.4° to 16°C). The contacts
solvent. Wash exposed skin
must be closed (continuity) at a temperature of 40°
thoroughly. Dry cleaning solvent (fed.