operators_manual

operator's manual. Never use filters that
contain supplemental coolant additives
(SCAs) in an ELC-filled system. Consult
your engine operator's manual for
information on the coolant filter and service
procedures.
CAUTION
Use of non-genuine PACCAR coolant
filters can cause severe engine dam-
age.
Cooling System Sealing Additives
and Soluble Oils
OK
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1. Do not use soluble oils or sealing
additives.
CAUTION
The use of sealing additives or soluble
oils in the cooling system can cause
damage to the engine. These additives
can plug various areas of the radiator,
EGR system and oil cooler. The plug-
ging of the cooling system can hamper
heat transfer, causing internal engine
damage. DO NOT use sealing addi-
tives or soluble oils in the cooling sys-
tem. The use of sealing additives can:
• Build up in coolant low-flow
areas
• Plug the radiator and oil cooler
• Damage the water pump seal
• Damage heat transfer surfaces
• Damage seals and hoses
• Corrode brass and copper
Failure to comply may result in equip-
ment or property damage.
Inspect Coolant Level
Inspect the vehicle's coolant surge tank for
proper coolant level. Add coolant if the
level in the tank is below the line marked
MIN.
The minimum fluid level is determined by
the line on the surge tank indicated by the
letters "MIN." This indicator is located
below the fill cap. The cooling system will
need to be filled if the level is not above the
"MIN" line, regardless of engine
temperature.
1. Fill location
2. Fill line
Radiator Hoses
Perform these maintenance procedures
according to the Preventative Maintenance
Schedule.
1. Check the following radiator hose
conditions:
MAINTENANCE - Cooling System Maintenance
252 Y53-6126-1A1 (01/21)
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