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SERVICE BULLETIN
DATE:
6/15/69
BULLETIN NUMBER: 20
MODEL:
All Engines
SUBJEC~
Connecting Pressure Sensing Devices to Oil Galleries
Oil pressure sensing devices, such as senders and switches,
must never be connected directly to any oil gallery of an
engine.
The reason is simply that continued engine vibration
causes fatigue of the fittings used to make such a connec-
tion.
If
these
fittings
fail,
the
engine loses
its oil
pressure and very quickly seizes.
Such pressure sensing devices must be bulkhead mounted and
connected to the oil gallery using an appropr iate grade of
lubricating oil hose.
Any fittings used to connect the hose
to the gallery must be of steel or malleable iron.
Brass
must not be used for this purpose.
102
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