Engine Oil Pressure Gauge Troubleshooting - Piper PA-24 Comanche Service Manual

PIPER COMANCHE SERVICE MANl'AL
TABLE XI-IX. TACHOMETER
•
Trouble
Cause
Remedy
'0
reading on indicator.
Broken sha ft.
Replace instrument.
either permanent or
intermittent.
Springs weak.
Replace instrument.
Pointer oscillate...
Rough spot on. or sharp bend
Repair or replace.
excessive Iy.
in shaft.
Excess friction in instru-
Replace instrument.
ment.
11-5~.
Engine Oil Pressure Gauge.
II-54. General. The oil pressure gauge is mounted in the cluster on the instrument panel. Thi- gauge \\ ill
indicate the amount of oil pressure available at the pressurized engine oil passage.
II-55. Removal And Replacement. Refer
to
Paragraph 11-20 of this section.
II-Sil. Troubleshooting.
•
TABLE XI-X. E'GI'E OIL PRESSU RE GArGE
3G13
ISSt ED. 8/18/72
Trouble
Cause Remedy
Exccssive error at zero.
Pointer loose on shaft.
Replace instrument.
Overpressure or sea-
soning of bourdon tube.
Excessive scale error.
Improper calibration adjust- Replace instrument.
ment.
E xces-ive pointer Improper damping or rough Disconnect tine and drain.
oscillation. Engine relief valve. Check for leaks.
If
trouble persists. clean
and adjust relief \al\ e.
Sluggish operation or Engine relief valve open. Check and clean.
pointer or pre,sure
fails to build up.
ISSTRt·\tE'
.