Thermo King SB-190 30, Manual

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Engine Maintenance (Rev. 12/03)
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Oil at the camshaft idler gear support lubricates the idler
bushing and passes through the transfer pump cam oil feed
line to lubricate the transfer pump cam and the injection
pump idler gear.
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 in
the last few liters (quarts) of oil to drain out. Refill the pan
with 15.2 liters (16 quarts) and check the dipstick level. Run
the unit, and then recheck the oil level. Add oil as necessary
to reach the full mark. See Specifications chapter 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 then 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 -34 C (-30 F).
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.
Antifreeze Maintenance Procedure
As with all equipment containing antifreeze, periodic
inspection on a regular basis is required to verify the condi-
tion of the antifreeze. After two years of service, inhibitors
become worn out and must be replaced by changing the
antifreeze.
Drain, flush and replace the total antifreeze mixture to
maintain total cooling system protection. When the anti-
freeze is replaced, use ethylene glycol type engine coolant
concentrate meeting the GM 6038-M specification. The fac-
tory recommends the use of a 50/50 antifreeze mixture in all
units even if they are not exposed to freezing temperatures.
This antifreeze mixture will provide the required corrosion
protection and lubrication for the water pump.