________________________________________________________________________________
1106 Perkins - Cooling and Lubrication System
Cooling System
1106 Perkins cooling system has the following components: Radiator,
Water pump, Cylinder block, Oil cooler, Cylinder head, Water temperature
regulator (thermostat).
Coolant Flow - The coolant flows from the bottom of the radiator (1) to
the centrifugal water pump (2). The water pump (2) is installed on the
front of the timing case. The water pump is driven by a gear. The gear
of the fuel injection pump drives the water pump gear. The water pump
forces the coolant through a passage in the timing case to the front of
the cylinder block (3).
(1) Radiator (2) Water pump (3) Cylinder block (4) Engine oil cooler (5)
Cylinder head (6) Water temperature regulator (thermostat) and housing
(7) Bypass for the water temperature regulator (thermostat)
The coolant enters a passage in the left side of the cylinder block (3).
Some coolant enters the cylinder block. Some coolant passes over the
element of the oil cooler (4). The coolant then enters the block (3).
Coolant flows around the outside of the cylinders then flows from the
cylinder block into the cylinder head (5).
The coolant flows forward through the cylinder head (5). The coolant
then flows into the housing of the water temperature regulator (6). If
the water temperature regulator (6) is closed, the coolant goes directly
through a bypass (7) to the inlet side of the water pump. If the water
temperature regulator is open, and the bypass is closed then the coolant
flows to the top of the radiator (1).
Lubrication System
Oil pressure for the 1106 Perkins engine lubrication system is provided
by an engine mounted oil pump. The engine oil pump is located on the
bottom of the cylinder block and within the oil pan. Lubricating oil
from the oil pan flows through a strainer and a pipe to the inlet side
of the engine oil pump. The engine oil pump is driven from the
crankshaft through an idler gear. The engine oil pump has an inner rotor
with four lobes.
The inner rotor is mounted to a shaft which also carries the drive gear.
The engine oil pump also has an outer annulus with five lobes. The axis
of rotation of the annulus is offset relative to the rotor. The distance
between the lobes of the rotor and the annulus increases on the right
hand side when the rotor is rotated. The increasing space between the
lobes of the rotor and the annulus causes a reduction in pressure. This
reduction in oil pressure causes oil to flow from the oil pan, through
the oil strainer and into the oil pump.
The distance between the lobes of the rotor and annulus decreases on the
left hand side when the rotor is rotated. The decreasing space between
the lobes of the rotor and annulus causes oil to be pressurized. The
increase in oil pressure causes oil to flow from the oil pump outlet
into the 1106 Perkins engine lubrication system. The oil flows from the
pump through holes in the cylinder block to a plate type oil cooler. The
plate type oil cooler is located on the left hand side of the engine.
From the oil cooler, the oil returns through a drilling in the cylinder
block to the filter head. The oil flows from the oil filter through a
passage to the oil gallery. The oil gallery is drilled through the total
length of the left side of the cylinder block. If the oil filter is on
the right side of the engine, the oil flows through a pipe assembly. The
pipe assembly is mounted to the lower face of the cylinder block.
Lubricating oil from the oil gallery flows through passages to the main
bearings of the crankshaft. The oil flows through the passages in the
crankshaft to the connecting rod bearing journals.
The pistons and the cylinder bores are lubricated by the splash of oil
and the oil mist. Lubricating oil from the main bearings flows through
passages in the cylinder block to the journals of the camshaft. Then,
the oil flows from the second journal of the camshaft at a reduced
pressure to the cylinder head. The oil then flows into the rocker arm
bushing of the rocker arm levers. The valve stems, the valve springs and
the valve lifters are lubricated by the splash and the mist of the oil.
The hub of the idler gear is lubricated by oil from the oil gallery.
The timing gears are lubricated by the splash of the oil. The
turbocharger is lubricated by oil via a drilled passage through the
cylinder block. An external line from the engine block supplies oil to
the turbocharger. The oil then flows through a line to the oil pan.
Piston cooling jets are installed in the engine. The piston cooling jets
are supplied with the oil from the oil gallery. The piston cooling jets
spray lubricating oil on the underside of the pistons in order to cool
the pistons.
________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________
________________________________________________________________________________________