Running; Check Gauges; Fault Indication; Operation At Low Load - Volvo TAD734GE User Manual

Operation
Correct operating technique is very important for both fuel economy and engine life. Always let the engine warm
up to normal operating temperature before full power is demanded. Avoid sudden throttle openings and operation
at high engine rpm.
Check instruments
Check all instruments immediately after starting, and
then regularly during operation.
IMPORTANT! On engines in continuous opera-
tion, the lubricating oil level must be checked, at
least every 24 hours. Refer to the "Maintenance,
lubrication system" chapter.

Fault indication

If the EMS 2 system receives abnormal signals from
the engine, the control unit generates fault codes and
signals alarms by means of lamps and audible warn-
ings. This is done by means of CAN signals to the in-
strument.
More information about fault codes and trouble shoot-
ing is found in the "Diagnostic function" chapter.
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Operation at low load

Avoid long-term operation at idle or at low load, since
this can lead to increased oil consumption and even-
tually to oil leakage from the exhaust manifold, since
at low turbo pressures oil will seep past the turbo-
charger seals and carry over with the charge air into
the inlet manifold.
As a consequence of this carbon builds up on valves
and piston crowns, and in exhaust ports and the ex-
haust turbine.
At low loads the combustion temperature becomes so
low that complete combustion cannot be guaranteed,
with the consequent possibilities of fuel-dilution of the
lubricating oil, and over time, leakage from the ex-
haust manifold.
If the following points are carried out as a comple-
ment to normal maintenance, there will be no risk
of malfunctions caused by operation at low load:
•
Reduce operation at low load to a minimum. If the
engine is regularly test run without load once a
week, the duration should be limited to 5 minutes.
•
Run the engine at full load for about 4 hours once
a year. Carbon deposits in the engine and exhaust
system are thus given the opportunity of being
burned up.