(5) Remove spring (23) and seats (84 and 35)
drive shaft (20) out of housing (39).
from shaft (38). Remove bushing (37) and screw (36).
(11) Remove lever (8) from housing (39).
(6) With fuel rack toward rear of engine, slide
Remove seal (14) and bushings (18) when required.
thrust bearing (27) towards front to gain access to ring
Remove bolt (11), lockwasher (12), cover (13), gasket
(80), then remove ring (30).
(9), and two screws (10) from housing (39).
(12) Drive pin (15) from lever (8), then remove
pin (17) and spring (16) from lever (8). Remove bolt (22)
Ring seats on inner lip of
and lock (21).
spring seat (34).
(7) Remove seats (34 and 35) from shaft (38),
plate (44), and gasket (42) from cover (3) when required.
spring (33), and bolt (47) from adapter (32). Remove
f. Reassembly and Installation. Reassemble and
bearing (49) from shaft (38).
install the governor by reversing the procedures used in
(8) Separate adapt er (32) from fuel rack by
steps (1) through (13) of e above.
removing pin (29), then remove adapter (32), washer
g. Cleaning, Inspection, and Repair.
(31), and thrust bearing (27).
(1) Clean all parts and dry thoroughly.
(9) Remove ring (28) from fuel rack then lift the
(2) Inspect bushings and bearings for scoring or
assembled weights (26) from rack.
wear. Inspect shafts for alignment, springs for tension
and return to length after compression. Inspect weights
for balance and freedom of movement on dowels.
The two dowel pins (25)
Inspect compression spring seats for freedom of
securing weights (24) must be forced
movement without play on shaft. Inspect mounting
out when necessary to install a new
hardware for burs or stripped threads. See that housing
At installation of new
is not cracked or broken.
weight, stake the pin(s) in place.
(3) Repair by replacing excessively worn or
(10) Use a soft face hammer and drive shaft (20)
defective components. Replace seals, gaskets, and
towards engine block until plug (19) is forced out, then
damaged mounting hardware.
Section V. FUEL INJECTOR FOR ENGINE MODE 687C-18-ES
ease in nozzle removal. Never permit
the polished surface of nozzle to
The fuel injectors deliver the required quantity of the fuel
contact any abrasive substance.
into the combustion chamber of each individual cylinder
as a fine spray mist. The fuel injection pump distributes
b. Cleaning, Inspection, and Repair.
the fuel through high pressure lines. When pressure in
(1) Clean all parts and dry thoroughly. Wipe
each injector reaches 2,200 psi, the nozzle opens and
nozzle clean with a soft lint-free dampened cloth.
fuel atomizes as it passes through the fuel injection
Assure that all carbon deposits have been removed.
Never allow any abrasive substance to contact nozzle.
overheating or corrosion caused by acids in fuel.
3-12. Fuel Injector
Inspect all seating surfaces for wear or corrosion. Test
a. Removal and Disassembly.
spring for tension and check its ability to return to normal
(1) Remove fuel injector (TM 53810-206-12).
length after compression. Inspect spindle for wear or
(2) Position the fuel injector in a vise equipped
Inspect all threaded surfaces for stripped
with soft metal jaw inserts then remove cap (1, fig. 3-12),
flatwasher (2), nut (3), and flatwasher (2).
(3) Repair by replacing worn or defective parts.
(3) Remove adjusting screw (4) from body (9)
Replace all gaskets and seals.
and lift spring (5) out of adjusting screw (4).
(4) Remove spindle (6) from body (9).
Caution: After inspecting injector
(5) Remove nut (12) from body (9), then remove
parts, wipe them free of all
nozzle (11) and gasket (10).
fingerprints as they are lid aside for
reassembly. Cover all parts with a
Note. When carbon deposit is high,
light coat of fuel oil, then cover with a
soak injector in a carbon solvent for
clean cloth until reassembly begins.