224 6 PERFORMANCE DIAGNOSTICS
Figure 288 Fuel Pressure Gauge
1. Quick disconnect check valve
2. Fuel test line
3. Fuel Pressure Gauge
4. Inline shut-off valve
5. Clear test line
Figure 289 Fuel Pressure Test Adapter
NOTE: If the engine is equipped with a Shrader valve,
use the Fuel Pressure Test Adapter.
Figure 290 Fuel/Oil Pressure Test C oupler
NOTE: If the engine is equipped with a diagnostic
coupling, adapt the Fuel/Oil Pressure Test Coupler to
the Fuel Pressure Gauge.
Figure 291 Fuel Pressure Gauge to fuel pressure
test adapter
2. Connect Fuel Pressure Gauge with shut-off valve
and clear 3/8” diameter hose to test valve.
3. Route the clear hose into a drain pan.
WARNING: To avoid serious personal
injury, possible death or damage to the engine
or vehicle – comply with the following:
When routing test line, do not crimp the line,
run the line too close to moving parts, or let
the line touch hot engine surfaces.
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any proced ures.
Follow all warnings, cautions, and notes.
©August 2008 Navistar, Inc.
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