Piper ARROW III - General; Manifold Pressure Gauge; Manifold Pressure Indicator; Removal and Replacement

TABLE X-VII. MAGNETIC COMPASS (cont)
Trouble Cause Remedy
Compass swings Normal.
erratically when
radio transmitter
is keyed.
10-43. MANIFOLD PRESSURE GAUGE.
10-44. GENERAL. The manifold pressure gauge is a vapor proof, absolute pressure type instrument. Pressure
from the intake manifold of the engine is transmitted to the instrument through a line. A pointer indicates the
manifold pressure available at the engine in inches of mercury.
10-45. TROUBLESHOOTING.
TABLE X-VIII. MANIFOLD PRESSURE INDICATOR
Trouble Cause Remedy
Excessive error at Pointer shifted. Replace instrument.
existing barometric
pressure.
Excessive error when Line leaking. Tighten line connections.
engine is running.
Sluggish or jerky Defective instrument. Replace instrument.
pointer movement.
Dull or discolored Age. Replace instrument.
marking.
Incorrect reading. Moisture or oil in Disconnect lines and
line. blow out.
10-46. REMOVAL AND REPLACEMENT. (Refer to Paragraph 10-76 of this section.)
Revised: 2/13/89
2G6
CHEROKEE ARROW III SERVICE MANUAL
INSTRUMENTS