(13) Remove bolts (4 and 48), lockwashers
and return to length after compression. Inspect weights
(43), plate (44), and gasket (42) from cover (3) when
for balance and freedom of movement on dowels.
required.
Inspect compression spring seats for freedom of
movement without play on shaft. Inspect mounting
f. Reassembly and Installation. Reassemble and
hardware for burs or stripped threads. See that housing
is not cracked or broken.
install the governor by reversing the procedures used in
(3) Repair by replacing excessively worn or
steps (1) through (13) of e above.
defective components. Replace seals, gaskets, and
g. Cleaning, Inspection, and Repair.
damaged mounting hardware.
(1) Clean all parts and dry thoroughly.
(2) Inspect bushings and bearings for scoring
or wear. Inspect shafts for alinement, springs for tension
Section V. FUEL INJECTOR FOR ENGINE MODEL 687C-18-ES
NOTE
3-11. General
When carbon deposit is high, soak
The fuel injectors deliver the required quantity of the fuel
injector in a carbon solvent for ease
into the combustion chamber of each individual cylinder
in nozzle removal. Never permit the
as a fine spray mist. The fuel injection pump distributes
polished surface of nozzle to contact
the fuel through high pressure lines. When pressure in
any abrasive substance.
each injector reaches 2,200 psi, the nozzle opens and
fuel atomizes as it passes through the fuel injection
b. Cleaning, Inspection, and Repair.
spindle enroute to the combustion chamber.
(1) Clean all parts except nozzle and dry
3-12. Fuel Injector
thoroughly. Wipe nozzle clean with a soft lintfree cloth.
Assure that all carbon deposits have been removed.
a. Removal and Disassembly.
Never allow any abrasive substance to contact nozzle.
(2) Inspect nozzle for distortion from
(1) Remove fuel injector (TM 5-3810-20112).
overheating or corrosion caused by acids in fuel. Inspect
(2) Position the fuel injector in a vise equipped
all seating surfaces for wear or corrosion. Test spring for
with soft metal jaw inserts then remove cap (1, fig. 3-
tension and check its ability to return to normal length
after compression. Inspect spindle for wear or cracks.
(3) Remove adjusting screw (4) from body (9)
Inspect all threaded surfaces for stripped threads.
and lift spring (5) out of adjusting screw (4).
(3) Repair by replacing worn or defective
(4) Remove spindle (6) from body (9).
parts. Replace all gaskets and seals.
(5) Remove nut (12) from body (9), then
remove nozzle (11) and gasket (10).
CAUTION
After inspecting injector parts, wipe
them free of all fingerprints as they
EMC 5-3810-206-35/10
1
Cap
8
Lockwasher (2 rqr)
2
Flatwasher (2 rqr)
9
Body
3
Nut
10
Gasket
4
Screw
11
Fuel injector nozzle
5
Spring
12
Nut
6
Spindle
13
Seal
7
Nut (2 rqr)
Figure 3-12. Fuel injector, exploded view.
AGO 20051A
3-15
