Thermo King SB-III 30 SR+, Manual

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Engine Maintenance (Rev. 04/02)
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back down through the push rod openings and lubricates the
tappets and the cam lobes as it returns to the oil pan.
The oil that flows to the fuel injection pump returns to the
oil pan after lubricating the injection pump components.
Oil pressure is affected by oil temperature, oil viscosity, and
engine speed. Low oil pressure can usually be traced to the
lack of oil, a faulty oil pressure regulating valve, loose con-
nections in the lubrication system, or worn bearings. Low
oil pressure is not normally caused by a faulty oil pump.
Engine Oil Change
The engine oil should be changed according to the Mainte-
nance Inspection Schedule. Drain the oil only when the
engine is hot to ensure that all the oil drains out. When
changing oil, keep unit and trailer level so all the oil can
flow from the oil pan. It is important to get as much of the
oil out as possible because most of the dirt particles are con-
tained in the last few quarts of oil that drain out of the pan.
Refill the pan with 13 quarts (12.3 liters) and check the dip-
stick level. Run the unit, and then recheck the oil level. The
engine oil level should be at the FULL mark with the dip-
stick turned (threaded) into the oil pan. Never overfill. See
Specifications section for correct type of oil.
Oil Filter Change
The oil filter should be changed along with the engine oil.
Use a genuine Thermo King oil filter.
1. Remove the filter.
2. Apply oil to the rubber ring of the new filter and install
the filter.
3. Tighten the filter until the rubber ring makes contact,
then tighten 1/2 turn more.
4. Start the unit and check for leaks.
ENGINE COOLING SYSTEM
The engine employs a closed, circulating type, pressurized
cooling system. Correct engine temperatures are controlled
and maintained by a radiator, fan and thermostat. The cool-
ant is circulated through the system by a belt driven centrif-
ugal pump. The pump draws the coolant from the side of the
radiator, circulates it through the cylinder block and head
and returns it to the radiator. A thermostat mounted in the
coolant outlet line from the cylinder head to the radiator
automatically maintains coolant temperature within the
specified temperature range.
All water cooled engines are shipped from the factory with
a 50% permanent type antifreeze concentrate and 50%
water mixture in the engine cooling system.
This provides the following:
1. Prevents freezing down to -30 F (-34 C).
2. Retards rust and mineral scale that can cause engine
overheating.
3. Retards corrosion (acid) that can attack accumulator
tanks, water tubes, radiators and core plugs.
4. Provides lubrication for the water pump seal.
ELC (Extended Life Coolant)
ELC has been phased into all trailer units equipped with
TK 486, engines. A nameplate on the coolant expansion
tank identifies units with ELC.
NOTE: The new engine coolant, Texaco Extended Life
Coolant, is RED in color instead of the current GREEN or
BLUE-GREEN colored coolants.