1. Air gag
2. Fuel pressure gaug
3. Vial graduate
4. Start/stop switch
5. Temperature gauge
10. Pressure Regulator
11. Sight glass
Figure 13-19. Injector Test Stand
position. Any leak in the hydraulic
clamping system will directly affect
injector loading and must not be
Fuel is delivered to the injector through
the inlet connector. Fuel pressure is controlled at this
point by a connecting line and pressure regulator.
The second connection with the clean
plastic line is the injector drain connection which carries
drain fuel from the injector back to the tank.
Fuel is delivered to the vial during a
measured number of strokes as recorded by the
13-14. FUEL INJECTION PUMP. To test, adjust,
replace, repair, overhaul, and rebuild the fuel injection
pump for Code "A" or Code "B", refer to figure 13-20
through 13-25 and proceed as follows:
Test and Calibration. The fuel pump should be
tested using the fuel pump test stand; refer to
paragraph b then proceed as follows:
(1) Remove the fuel pump and mainshaft cover
from the assembly as follows:
(a) Remove the speed switch in accordance
with the Operator/ Crew and Organizational
(b) Disconnect the fuel pump line from the
pump shut-off valve.
(c) Disconnect the throttle lever linkage from
the throttle lever.
(d) Disconnect the shut-off valve electrical
(e) Disconnect the pump cooling line to the
check valve elbow (1, figure 13-24) on the
mainshaft cover to the engine assembly.
(2) Install the fuel pump in the fuel pump test stand
mounting bracket leaving about 1/16 inch
(0.0625 mm) between fuel pump coupling and
test stand drive coupling.
(3) Squirt some clean test oil into the gear pump
inlet hole, so pump will pick up faster, then
connect suction line.
(4) Fill the fuel pump housing with clean test fuel oil
through the plug hole on