Perkins 1300 EDi Series, Workshop Manual, Page: 139 / 264

Workshop Manual, TPD 1353E, Issue 3 127
10
Peregrine EDi and 1300 Series EDi
Lubrication system 10
General description (Low-pressure system)
Refer to "Low-pressure system flow diagram" on page 128 for illustration references.
Lubricating oil from the sump passes through a strainer and a pipe into a channel in the timing case. The
lubricating oil passes through the channel to the inlet of the oil pump.
The lubricating oil passes from the oil pump, under pressure, through a channel in the timing case. The oil
either passes through a relief valve which is fitted in the timing case or passes into an oil pressure rail. The
relief valve opens at 551 kPa (80 lbf/in
2
) 5,6 kgf/cm
2
and returns the oil to the sump.
A temperature control valve in the oil filter head controls the flow of oil from the pressure rail. If the oil is hot
(A2), the valve will open and the oil passes through the oil cooler to the oil filter head and then into the filter. If
the oil is cold (A3), the valve closes and the oil passes directly to the oil filter.
Clean lubricating oil (A1) passes from the filter to a regulator valve which operates at 331 kPa (48 lbf/in
2
)
3,37 kgf/cm
2
. If a restriction occurs in the filter element, a by-pass valve fitted in the filter housing opens. Oil
that by-passes the filter passes directly to the regulator valve. The regulator valve either by-passes oil to the
sump or allows oil to pass to the main pressure rail and then through ports in the cylinder block to the
crankshaft main journals.
Lubricating oil from the main pressure rail also passes:
l
To jets in the crankcase that spray oil on the underside of the pistons to cool them.
l
Through a channel in the crankcase and in the timing case to the reservoir for the high-pressure pump.
There are ports in the crankcase through which oil passes to the camshaft journals.
Lubricating oil passes through holes drilled in the crankshaft journals to the crank pins to lubricate the big end
bearings.
Lubricating oil from the rear journal of the crankshaft passes to the rear of the rocker shaft. The oil passes along
the hollow rocker shaft to lubricate the rocker levers.
The turbocharger receives clean oil through a pipe from the oil filter head. The oil passes through the bearing
housing of the turbocharger and returns through a pipe to the crankcase, and then to the sump.
The compressor, if fitted, receives oil from a union connection fitted to the cylinder block. Lubricating oil from
the main pressure rail passes through a drilled hole to the union, the oil then passes to the compressor.
Lubricating oil from the compressor returns to the sump.
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