Thermo King Super II SR+, Manual, Page: 61 / 145

51
Engine Maintenance
ENGINE LUBRICATION SYSTEM
The se 2.2 diesel engine has a pressure lubrication system.
Oil is circulated by a gear-type oil pump driven off a gear on
the camshaft. The pump has several times the capacity
required by the engine; excess oil is returned to the crank-
case. The oil pump extends down into the oil pan, but is
positioned far enough away from the bottom of the oil pan
that any residue that settles to the bottom is not picked up by
the screened inlet.
From the oil pump, the oil passes through the oil supply
pipe to the oil filter assembly. The oil filter assembly con-
tains the oil pressure relief valve, the bypass valve and the
oil filter. The oil is forced through the oil filter into the main
oil gallery. The main oil gallery supplies oil to the main
bearings, camshaft, and camshaft idler gear support.
Oil passes from the main bearings, through drilled passages
in the crankshaft, to the connecting rod bearings. The tap-
pets and cylinder walls are lubricated by oil thrown from
connecting rod bearings as the crankshaft rotates.
From the rear camshaft bearing passageway, oil passes
through an oil gallery inside the engine to the rocker arm
shaft where the surplus drains back into the crankcase.
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.
1. Rocker Arm Shaft
2. Camshaft
3. Crankshaft
4. Oil Pump
5. Oil Filter
Lubrication System
1
2
3
4
5
sp2008