Checking Compression Pressure - Man D 2866 LUE 605 Repair Manual

Fig. 1
D Check valve clearance and adjust, if necessary,
see page 89
D Let engine run until coolant temperature re-
aches approx. 60-80°C
D Remove all fuel injectors, see page 31
D For compression guideline values, see publica-
tion "Service Data"
Start with 1st cylinder. Insert new seal, screw on
test connection of compression recorder with union
nut and tighten with pin spanner.
Fig. 2
Screw compression recorder for diesel engines on
to test connection. Insert test sheet into compres-
sion recorder.
Turn engine over by means of starter until the
pointer of the compression recorder is not de-
flected any further.
Connect up compression recorder with test con-
nection to the next cylinder, and check all cylinders
as described above.
Fig. 3
Depending on the compression recorder design,
the engine can also be started directly by the com-
pression recorder.
For this purpose the electrical connections on the
starter electromagnetic switch (terminals 50 and
30) are to be accordingly connected up.
Fig. 4
Compare the values measured and remove com-
pression recorder and test connection. Apply
"Never Seeze" to contact faces on fuel injectors.
Screw in fuel injectors with nozzle and new seal.
Screw on union nut and tighten to specified torque.
Connect up injection lines and leakage fuel return
lines.

Checking compression pressure

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