TM 55-2840-231-23
8-6.
Oil Pressure Regulator - Removal, Installation, Inspection, Testing and
ENGINE/ - Continued
3. Inspection
4. Testing
Item
Oil pressure
During start
Idle to 78% N1
78-89% N1
90% N1 and above
NOTE
Adjustment - Continued
Adjust the regulating
valve as outlined in item 5,
Adjustment.
a. Check external condition
of regulator; insure that
the regulator is lockwired.
If regulator is not lockwired,
check the adjustment as
outlined in item 5, Adjust-
ment.
b. If oil pressure cannot be
adjusted within limits,
remove the regulator.
Check for a broken spring
or evidence of poppet
sticking. Check for damage
or wear on the poppet
seating surface.
Oil pressure limits apply to an
engine that is at normal operating
temperature.
a. With engine running at
ground idle, check that
the oil pressure is 50
psig minimum.
b. With engine operating at
maximum speed, check
that oil pressure is
within limits. (Refer to
following table.)
Limit
Remarks
Increasing pressure by the time 20% N1 is
Abort start if pressure does
reached
not start increasing.
50 psig minimum
90-130 psig
115-130 psig
8-8
