Inspect connections for security and
Inspect wiring for defective insulation.
Test. Perform continuity check, using
ohmmeter between connecting points in the
wiring harness. (See FO-7, Control Cubicle,
Wiring Diagram.) Check for short circuits
between connector pins of the same
receptacle or terminal board.
If a broken wire is accessible, remove
sufficient insulation from each side of
the break to allow a good connection
of the bared ends by twisting them
together. Solder the connection and
wrap with electrical tape.
If a wire is broken from a terminal
lug, replace the lug. If a wire is
broken from a connector, resolder and
Under no condition leave the bare
If a break in the wire is inaccessible
within the wiring harness, disconnect
it at both ends and tape both ends.
Lace a new lead of the same gauge
and insulation outside the harness
and connect it to the proper terminals
or pins. Properly tag both ends of all
Replacement. If 30 percent of the harness
wires are defective, refer to next higher
level of maintenance for replacement.
Section XIII. MAINTENANCE OF AIR CLEANER
4-42. AIR CLEANER. (See figure 4-23.)
Removal. Remove both air cleaners as
Loosen eight hose clamps (24).
Remove six screws (15), nuts (16),
and lockwashers (17) from mounting
brackets (18 and 19).
Remove air cleaners (29).
Service. Check the air cleaner service
indicator. If indicator is in red, proceed as
follows (see figure 3-1):
Remove and empty dust cup (13)
when three-quarters full.
Reinstall dust cup (13) and O-ring
Clean air cleaner tubes with a stiff
brush. If heavy plugging is evident,
remove lower body section (15) and
clean with compressed air or water
not exceeding 1600F (71°C).
Never clean air cleaner tubes with
elements are installed in the air cleaner.
Do not steam clean air cleaner tubes.
Unfasten cover latches and remove
cover (1). Remove wing nut (3) and
remove primary filter element (4).
Remove cotter pin (5), castellated nut
(7).Replace with new element at
interval indicated in table 4-2 and
secure with castellated nut (6) and
cotter pin (5). Do not clean safety
filter element (7).
Clean primary filter element (4) by
either method (a) or (b), as follows: