Air Intake and Exhaust System Operation and Tests
IMPORTANT: If testing the engine with the air filter
system removed, install JDG576
Turbocharger Shield to inlet of
NOTE: On "H" engines, pressure reading should be taken
at intake manifold after the aftercooler.
1. Disconnect line (A) from intake manifold and install the
appropriate fitting from JDE147 Manifold Pressure Test
Kit or FKM10002 Universal Pressure Test Kit. Connect
gauge (B) and hose assembly to fitting. Be sure all
connections are tight.
IMPORTANT: Engine speed and load should be
stabilized before taking a gauge
reading. Be sure that gauge works
properly and familiarize yourself with
the use of the gauge.
Turbo-boost pressure checks are only a
guide to determine if there is an engine
problem (valve leakage, faulty nozzles,
A--Intake Manifold Plug
etc.). Low pressure readings are not a
conclusive reason for increasing
injection pump fuel delivery. Pump
adjustment should be within
specifications as established by an
authorized diesel repair station.
2. Before checking boost pressure, warm up engine to
allow the lubricating oil to reach operating temperature.
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