MAINTENANCE OF THE M88A1 - OD1672 - LESSON 2/TASK 1
injector pump.
The check valve prevents a backflow of fuel into the
injector from the fuel return line and prevents continued engine operation
after the fuel shutoff valve is closed.
FIGURE 16.
FUEL INJECTION PUMP.
(7) Fuel Lines and Injector Nozzles.
There are twelve stainless
steel fuel injection lines (13) (figure 15 on page 35) that carry fuel under
high pressure from the injector pump to twelve fuel injector nozzles (15)
(figure 15) on the left and right banks of the engine.
Excess fuel is
carried from the nozzles through return tubes (1 and 16) on each cylinder
bank to the fuel return system.
(8) Purge Pump Assembly.
A hand-operated purge pump (figure 14 on
page 34) next to the driver's seat provides a means of purging air from the
fuel injector pump, fuel filters, and engine fuel lines. The air is forced
by the fuel pressure from the
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