Holiday Neptune 2004, Owner'S Manual

Page: 387 / 416

CHASSIS INFORMATION --- SECTION 10 • 387
NEPTUNE 2004
10
General guidelines for shutting the engine down are fairly simplistic. Allow the
engine to idle three to five 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 generally lighter engine
operation and the need for the three to five minutes is not necessary. It is recommended
to fill the fuel tank at the end of the day to help prevent condensation and drive
out moist air. Do not fill the fuel tank to the top, as fuel will expand when warm
and may overflow.
When the motorhome has been sitting for extended periods, 30 days or more,
verify all the fluid levels are correct. Follow the normal starting procedures. If the
oil pressure gauge does not register within 15 seconds, shut off the engine
immediately to avoid damage. Consult the OEM Engine Manual for guidelines on
troubleshooting low oil pressure, or contact a qualified service technician. If oil
pressure is normal, allow the engine to idle for three to five minutes before operating
under a load.
A fully formulated antifreeze is recommended. The use 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,
buffering compounds and a percentage of good clean quality water.
The antifreeze of coolant must meet ethylene glycol or propylene
glycol recommendations. A good clean quality water in a 50/50 ratio
(40 to 60% working range) mixed with fully formatted antifreeze
will provide protection 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
Cummins Operation & Maintenance 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.
NOTE: Any item on the back of the motorhome which blocks the
grill opening or changes the air flow may cause an overheating
condition under some circumstances.
The coolant fluid freeze point should be checked with every oil change interval
at 15,000 miles, 500 hours or six months, whichever comes first. The coolant
should be drained and flushed at 6,000 hours or two years of service, whichever
comes first.
ENGINE
SHUTDOWN
Extended Shutdown
COOLANT
080208d