OPM 250 en-GB 23
© Scania CV AB 2022, Sweden
Starting and running
Oil pressure
Normal oil pressure during operation is 3-6 bar
(43.5-87 psi). The lowest permitted oil pressure
when idling is 0.7 bar (10.2 psi).
The incorrect oil pressure alarm has the follow-
ing functions:
•Alarm only.
• Alarm and torque reduction by 30%.
• Alarm and engine shutdown.
• Alarm and engine shutdown override control.
High oil pressure (above 6 bar/87 psi) is normal
if the engine is cold when started.
Alarm levels, engines without SCR sys-
tem
If the engine does not have the SCR system, the
engine management system activates an alarm at
the levels below. The values refer to overpres-
sure, not absolute pressure. The alarm is activat-
ed after 3 seconds.
• At an engine speed below 1,000 rpm and an
oil pressure below 0.7 bar (10.2 psi).
• At an engine speed above 1,000 rpm and an
oil pressure below 2.5 bar (36.3 psi).
Alarm levels, engines with SCR system
If the engine is fitted with the SCR system, the
engine management system activates an alarm at
the levels below. The values refer to overpres-
sure, not absolute pressure. The alarm is activat-
ed after 10 seconds.
• At an engine speed below 600 rpm and an oil
pressure below 0.7 bar (10.2 psi).
• At 1,200 rpm and with oil pressure below 2.2
bar (32 psi).
• At 2,100 rpm and with oil pressure below 2.8
bar (40.6 psi).
Charging indicator lamp
If the lamp comes on during operation: Check
and adjust the alternator drive belt according to
the instructions in the section Checking the drive
belt.
If the charging indicator lamp is still on, this
could be due to an alternator fault or a fault in the
electrical system.
Belt transmission
When the belt transmission is new, it may make
a squeaking noise when running. This noise is
normal and disappears after 50-100 hours of op-
eration. The noise does not affect the service life
of the belt transmission.
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