General guidelines for shutting the engine down are fairly simplistic.
Allow the engine to idle 3 to 5 minutes after a full load operation. This
allows adequate cool down of pistons, cylinders, bearings and turbocharger
components. Under normal driving conditions, exiting the highway is gen-
erally lighter engine operation and the need for the 3 to 5 minutes is not
necessary.
When the motorhome has been sitting for extended periods, 30 days or
more, verify all the fluid levels are correct. Follow the normal starting pro-
cedures. If the oil pressure gauge does not register within 15 seconds, shut
off the engine immediately to avoid damage. Consult the Cummins
Operations and Maintenance Manual for guidelines on troubleshooting low
oil pressure, or contact a qualified service technician. Allow the engine to
idle for 3 to 5 minutes before operating under a load.
A fully formulated antifreeze or coolant containing a precharge of
Supplemental Coolant Additives (SCA) is recommended. The use of either
will significantly simplify coolant system maintenance. The difference
between a fully formatted antifreeze and a fully formatted coolant is the
percentage of water. Both contain balance amounts of antifreeze, SCA,
buffering compounds and a percentage of good clean quality water. The
antifreeze of coolant must meet ethylene glycol or propylene glycol recom-
mendations. A good clean quality water in a 50/50 ratio (40 to 60 percent
working range) mixed with fully formatted antifreeze will provide protec-
tion from -34º F to 228º F. The 50/50 mix ratio must be premixed prior to
being put in the system. Placing antifreeze and water in the cooling system
is not recommended. Consult the O&M manual for more details.
NOTE: An over concentration of antifreeze, or the use of high silicate
antifreeze, can cause damage to the coolant system and engine.
Antifreeze is essential in every climate.
The coolant fluid freeze point should be checked with every oil change
interval at 15,000 miles, 500 hours or 6 months, whichever comes first.
Also change the coolant filter at the same interval unless SCA concentra-
tion is over three units. The coolant should be drained and flushed at 6000
hours or 2 years of service, whichever comes first.
Chassis Information
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S I G N A T U R E
1 0 • 2 8 7
ENGINE
SHUTDOWN
-Extended
ENGINE
SHUTDOWN
COOLANT
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