SHOP MANUAL
Engine
Ch 1 page 216
Descriptions, High pressure check
Checking for internal leaks
1 Start the engine.
2 Start the test "Checking for internal leaks " in SDP3.
3 Switch off the engine. Read the pressure remaining in the accumulator using SDP3. There should be some
pressure remaining. There are internal leaks if the pressure approaches 0 bar within 1 min.
H2 - Checking the return fuel pressure
1 Connect pressure gauge 99 362 to the test connection on the return fuel manifold and open the test
connection.
2 Start the engine. Read the pressure with the engine idling. The value should be below 0.8 bar. If the pres
sure exceeds 0.8 bar the overflow valve on the return fuel manifold should be cleaned and visually inspected.
Start again from step 1.
3 Switch off the engine, remove the pressure gauge and close the test connection.
When the overow valve is removed air will be introduced, opposite the ow di-
rection. It will take some time for the system to bleed itself. During this time the
measurement is not reliable. Leave the engine idling for a while before repeating
the test. If the pressure still exceeds 0.8 bar, there is internal leakage in an injec-
tor.
NOTE
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