Thermo King SB-III 30 SR+, Manual

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Engine Maintenance
EMI 3000
EMI 3000 is an extended maintenance interval package. It
was phased in as standard equipment on this unit in the first
quarter of 2001. The EMI 3000 package consists of the fol-
lowing key components:
• New EMI 3000-Hour Cyclonic Air Cleaner Assembly
and Air Cleaner Element
• New EMI 3000-Hour Fuel Filter (black with gold let-
tering)
• New EMI 3000-Hour Dual Element Oil Filter (black
with gold lettering)
• API Rating CG-4 Mineral Oil (ACEA Rating E2-96 for
Europe)
• Five Year or 12,000 Hour ELC (Extended Life Cool-
ant).
The EMI package allows standard maintenance intervals to
be extended to 3,000 hours, or 2 years, whichever occurs
first.
NOTE: Units equipped with the EMI 3000 package do
require regular inspection in accordance with Thermo
King’s maintenance recommendations.
NOTE: The new EMI 3000 oil filters and new EMI 3000
air cleaners are NOT interchangeable with the oil filters
and air cleaners previously used in this unit. Refer to Ser-
vice Bulletin T&T 274 for information about retrofitting
EMI 3000 components.
ENGINE LUBRICATION SYSTEM
The TK 486 engine has a pressure lubrication system. A tro-
choid type oil pump circulates the oil through the system to
lubricate the engine compartments. The oil pump contains a
pressure regulating valve that limits the oil pressure to
approximately 45 to 57 psi (310 to 390 kPa). The oil pump
is driven by the crankshaft gear, and is attached to the lower
part of the timing gear housing.
The oil is picked up by a screened inlet near the bottom of
the oil pan. The inlet is positioned far enough from the bot-
tom of the pan to avoid picking up any of the residue that
tends to settle on the bottom of the pan. The oil then passes
through the intake pipe to the oil pump.
The oil pump forces the oil through an oil gallery to the dual
element (full flow/bypass) oil filter. Dirt and other particles
are trapped in the filter element as the oil passes through the
oil filter. If the filter element becomes clogged, a bypass
valve built into the oil filter allows the oil to bypass the fil-
ter element. This keeps the engine components from being
starved for oil if the filter element is clogged.
After passing through the oil filter, the oil enters the main
oil gallery. Oil passages connected to the main oil gallery
supply oil to the idler gear shaft, the camshaft bearings, the
main bearings, and the fuel injection pump.
Oil from the idler gear shaft lubricates the idler gear bush-
ing, the idler gear, the other timing gears, and the fuel pump
before returning to the oil pan.
Some of the oil supplied to the main bearings flows through
passages in the crankshaft to the connecting rod bearings.
This oil is thrown around the bottom end of the engine as it
flows out of the bearings while the crankshaft rotates. Some
of this oil lubricates the cylinder walls. Some of this oil
lands in the holes on the top of the connecting rods and
lubricates the wrist pins and the connecting rod bushings.
The oil eventually returns to the oil pan.
Some of the oil supplied to the camshaft bearings flows
through passages in the cylinder block, the cylinder head,
and the rocker arm supports to the rocker arm shaft. The
rocker arm shaft supplies oil to the rocker arm bushings and
the rocker arms. Some oil squirts out of holes in the rocker
arms to lubricate the valve stem caps and the valve stems.
The oil that is pumped up to the rocker arm assembly flows