1
2
3
4
Checking compression
111
D Check valve clearance and adjust, if necessary,
see page 98
D Let engine warm up
D Remove all fuel injectors, see page 31
D For compression guideline values, see
publication “Service Data”
Fig. 1
Start with 1st cylinder. Insert new seal, screw on
test connection of compression recorder with union
nut and tighten with pin spanner.
Insert test sheet into compression recorder for
Diesel engines. Screw compression recorder on to
test connection.
Turn engine over with starter until needle deflection
of compression recorder stops, at the same time
holding adjusting lever of injection pump in stop
position.
Connect up compression recorder with test
connection to the next cylinder, and check all
cylinders as described above.
Fig. 2
Depending on the compression recorder design,
the engine can also be started directly by the
compression recorder. For this purpose the
electrical connections on the starter
electromagnetic switch (terminals 50 and 30) are
to be accordingly
connected up.
Fig. 3
Compare the values measured and remove
compression recorder and test connection. Apply
“Never Seeze” to contact faces on fuel injectors.
Fig. 4
Screw in fuel injectors with nozzle and new seal.
Screw on union nut and tighten to specified torque.
Tightening torque: 120 Nm
Connect up injection lines and leakage fuel return
lines.
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