F
OR
M
ODELS
: JGI, JGM, JGN, JGP
AND
JGQ
S
ECTION
4 L
UBRICATION
PAGE 4-58
Low Oil Pressure Shutdown
The low oil pressure shutdown is normally mounted by the packager and is supplied to cus-
tomer specifications. Ariel provides an oil pressure pickup fitting on the oil gallery located after
the cooler and filter. The electric or pneumatic oil pressure switch is to be set to actuate when
oil pressure falls below 35 psig (2.4 bar
g
). An alarm set to actuate when oil pressure falls be-
low 50 psig (3.4 bar
g
) is desirable.
NOTE:
1.
THE COMPRESSOR MUST HAVE A WORKING LOW OIL PRESSURE SHUT-
DOWN. WHEN SHUTDOWN AS RESULT OF LOW OIL PRESSURE, DO NOT
ATTEMPT TO RE-START UNTIL FAULT IS FOUND AND CORRECTED.
2.
DO NOT ATTEMPT TO ADD OIL TO THE CRANKCASE THROUGH THE
BREATHER HOLE WHILE THE UNIT IS RUNNING. THIS WILL CAUSE OIL
FOAMING, AND UNNECESSARY NO-FLOW SHUTDOWNS IN THE FORCE
FEED LUBRICATION SYSTEM.
3.
WHEN THE FORCE FEED LUBRICATION SYSTEM HAS A COMMON SUP-
PLY (FROM THE CRANKCASE), IT IS CONSTANTLY USING OIL FROM THE
CRANKCASE, A WORKING OIL SUMP LEVEL CONTROLLER IS NECES-
SARY. THIS MUST BE DESIGNED TO ALLOW OIL TO FLOW INTO THE
CRANKCASE FROM AN OVERHEAD TANK AT ALL AMBIENT TEMPERA-
TURE CONDITIONS.
