10-62. TROUBLESHOOTING.
TABLE X-IX. ENGINE OIL PRESSURE GAUGE
Trouble
Cause
Remedy
Excessive error at
Pointer loose on shaft
Replace instrument.
zero.
Overpressure or seasoning
of bourdon tube.
Excessive scale error.
Improper calibration
Replace instrument.
adjustment.
Excessive pointer
Air in line or rough
Disconnect line and fill with light
oscillation.
engine relief valve.
oil. Check for leaks. If trouble persists,
clean and adjust relief valve.
Sluggish operation ofpointer
Engine relief valve
Clean and check.
or pressure fails to build up.
open.
10-63. REMOVAL AND REPLACEMENT. Refer to Paragraph 10-89 of this section.
CALIBRATION CHART
GRADUATION DEGREES FROM ZERO TOLERANCE *
0#
-30°
±1
25#
-14.5°
±1/2
60#
+8°
±1
90#
+24°
±1
100#
+30°
±1/2
*—NOTE—
TOLERANCE IS IN
POINTER WIDTHS
0 25 60 100
OIL PRESS
7/16 - 20 THD. X 37° FLARE
Figure 10-4. Engine Oil Pressure Gauge
PIPER AIRCRAFT
PA-28-161 CADET
AIRPLANE MAINTENANCE MANUAL
Issued: FEBRUARY. 28, 1989
I N S T R U M E N T
2C5