3304 VEHICULAR ENGINES
TM 5-3805-263-14&P-2
SPECIFICATIONS
ENGINE OIL PRESSURE
All steps of this procedure must be followed for the pressure findings
to be usable.
Step 3. Run the engine to get the oil temperature at 210° F (99° C).
NOTE: A 5° F (3° C) increase in oil temperature gives approximately
Step 1. Be sure that the engine is filled to thecorrect level with either
1 psi (7 kPa) decrease in oil pressure.
Step 4. Keep the engineoil temperature constant. With the engine at
the rpm from the chart, read the pressure gauge.
SAE 10 or SAE 30 oil. If any other viscosity of oil is used, the
information in the ENGINE OIL PRESSURE CHART does
not apply.
Step 2. Find a location on the engine oil manifold to install a tee. The
Make a comparison between the pressure reading on the test gauge
easiest method is to remove the sending unit for the present
and the minimum permissible pressure from the ENGINE OIL PRES-
gauge and install a tee at this location. Install a probe from
SURE CHART. If the pressure reading on the test gauge is below
the 9S9102 Thermistor Thermometer Group in one side of
the minimum permissible pressure, find the cause and correct it.
the tee Connect a 8M2744 Gauge from the 5P6225 Hydraulic
Operation of the engine with low oil pressure can be the cause of
Test Box to the other side of the tee.
engine failure or of a reduction in engine life.
ENGINE OIL PRESSURE CHART
TEST
rpm
1500 rpm
or above
SAE NO.
MINIMUM PERMISSIBLE PRESSURE
OF TEST OIL
psi
kPa
10
20
140
30
24
165
600 to 800
rpm
10
6
40
30
7
50
OIL FILTER GROUP
2P6475
Oil cooler bypass valve and oil filter bypass valve
must open at a pressure difference of
25 ± 3 psi (170 ± 20 kPa)
(1) 8M3182 Spring for oil cooler bypass valve:
Length under rest force
2.5 in. (63.5 mm)
Test force . . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.92 lb. (39.7 N)
Free length after test.......................... 3.61 in. (91.7 mm)
Outside diameter . . . . . . . . . . . . . . . . . . . . . . . .
.81 in. (20.6 mm)
(2) 8M3182 Spring for oil filter bypass valve:
Length under test force . . . . . . . . . . . . . . . . . . . . 2.5 in. (63.5 mm)
Test force . . . . . . . . . . . . . . . . . . . . . . . . . . .
8.92 lb. (39.7 N)
Free length after test
3.61 in. 191.7 mm)
Outside diameter
. . . . . . . . . . . . . . . . . . . . . . . .81 in. (20.6 mm)
(3) Put engine oil on seal (3). Put filter (4) in position and tighten until the
seal makes contact with the base. Turn the filter an additional 270°.
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