4
DETROIT DIESEL 53
SECTION 4
LUBRICATION SYSTEM
CONTENTS
4
Lubrication System..
4.1
lubricating Oil Pump
4.1.1
Lubricating Oil Pressure Regulator
4.4
Lubricating Oil Cooler
4.6
Oil Level Dipstick
Oil Pan..
4.7
4.8
Ventilating System
4.0
Shop Notes - Specifications - Service Tools
LUBRICATION
SYSTEM
IN-LINE
ENGINES
replaceable element type full flow filter. With this type
The engine lubrication systems, illustrated in Figs. 1
and 2,. include an oil intake screen and tube assembly,
filter, which is installed between the oil pump and the
an oil pump, an oil pressure regulator valve, a full flow
oil cooler, all of the oil is filtered before entering the
oil filter with a by-pass valve, an oil cooler and oil
engine. Should the filter become plugged, the oil will
cooler by-pass valve.
flow through a by-pass valve, which opens at
approximately 18-21 psi, directly to the oil cooler.
The rotor type oil pump is bolted to the back of the
engine lower front cover and is driven directly by the
crankshaft.
On current engines, the oil cooler by-pass valve is
located on the right-hand side of the engine front
cover and the oil pressure regulator valve is located on
the left-hand side as viewed from the rear of the
engine (Figs. 1 and 2). On former engines, both valves
Lubricating oil from the pump passes from the lower
were located on the right-hand side of the cover
front engine cover through short gallery passages in
(Figs. 1 and 2).
the cylinder block. From the block, the oil flows to the
full flow filter, then through the oil cooler and back
If the cooler becomes plugged, the oil flow will be to a
into the front engine cover and cylinder block oil
by-pass valve in the lower engine front cover and then
galleries for distribution to the various engine
bearings. The drain from the cylinder head and other
to the cylinder block oil galleries. The by-pass valve
engine parts leads back to the oil pan.
opens at approximately 52 psi in the current In-line
In the former In-line engines,
engines.
the by-pass valve opens at approximately 30 psi.
Clean engine oil is assured at all times by the use of a
SEC. 4 Page 1
August, 1972
