The Series 53 engine lubricating system, illustrated in
full-flow filter that removes the larger foreign particles
Figs. 15 and 16, includes an oil intake screen and tube
without restricting the normal flow of oil.
assembly, an oil pump, a pressure regulator, a full-flow
oil filter or by-pass filter with by-pass valve; and an oil
The by-pass filter assembly, when used, continually
cooler with a by-pass valve.
filters a portion of the lubricating oil that is being bled off
the oil gallery when the engine is running. Eventually all
Lubricating oil from the pump passes from the lower
of the oil passes through the filter, filtering out minute
front cover through short oil galleries in the cylinder
foreign particles that may be present.
block. From the block, the oil flows to the full-flow oil
filter, then through the oil cooler (if used) and back into
The lubricating oil filter elements should be replaced,
the front engine cover and cylinder block oil galleries for
each time the engine oil is changed, as follows:
distribution to the various engine bearings. The drains
from the cylinder head(s) and other engine parts lead
1. Remove the drain plug and drain the oil.
back to the oil pan.
2. The filter shell, element and stud may be detached
Oil pressure is regulated by a pressure relief valve
as an assembly, after removing the center stud from the
mounted in the engine front cover. Oil cooler and oil
base. Discard the gasket.
filter by-pass valves prevent the stoppage of oil flow if
these items become plugged.
3. Clean the filter base.
4. Discard the used element, wipe out the filter shell
and install a new element on the center stud.
Each engine is equipped with a full-flow type lubricating
5. Place a new gasket in the filter base, position the
oil filter (Figs. 13 and 14). If additional filtering is
shell and element assembly on the gasket and tighten
required, a by-pass type oil filter may also be installed.
the center stud carefully to prevent damaging the gasket
or center stud.
All of the oil supplied to the engine passes through the
6. Install the drain plug and, after the engine is started,
check for oil leaks.
Fig 13. Typical In-Line Engine Oil Filter Mounting
Fig. 14. Typical V-Type Engine Oil Filter Mounting