Supplement coolant additives, or equivalent, are used to prevent liner
pitting, corrosion and scale deposits in the cooling system. Use the correct
Fleetguard coolant filter to maintain the recommended SCA concentration in
the system. Maintain the correct concentration by changing the service filter
at each oil drain interval.
NOTE: The correct filter is determined by the total cooling
system capacity and oil drain interval. Refer to the Coolant
Capacity Specifications in this section.
CAUTION: Insufficient concentration of the coolant
additives will result in liner pitting and engine failure. The
SCA concentration must not fall below 1.2 units or exceed 3
units per gallon of cooling system capacity.
Use the correct Fleetguard coolant filter to maintain
the recommended SCA concentration in the system.
Maintain the correct concentration by changing the
service coolant filter at each oil drain interval. The oil
pressure gauge, temperature gauge, warning lamps and
other safety lamps should be checked daily to ensure
proper operations.
NOTE: The correct filter is determined by the total cooling
system capacity. If you have any questions refer to the
Cummins manual.
NOTE: The engine does not require a “break-in” proce-
dure.
Rotten, swollen and worn hoses, as well as loose connections, are frequent
causes of coolant system problems. Overheating can be caused by an collapsed
hose or a clog caused by rubber shedding from a rotton hose. Replace any
hose found to be cracked, swollen or damaged. Connections should be inspected
periodically and hose clamps tightened.
If the coolant system becomes frozen solid, place the motorhome in a
warm area until the ice is completely thawed. At this point the motorhome
must be towed. If the engine is operated when the cooling system is frozen it
will result in engine overheating due to insufficient coolant.
Once thawed, check engine, radiator and related components for damage
caused by expansion of frozen coolant.
If the engine is overheated, never pour cold coolant into a hot engine. The
sudden change in temperature may crack the cylinder head or block. If the
engine is hot, fill slowly to prevent rapid cooling and distortion of engine
castings.
Chassis Information
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
DIPLOMAT 10•289
Coolant Hoses
Coolant System
- Thawing
OM090331.eps
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