TROUBLESHOOTING MANIFOLD PRESSURE GAUGE.
CHART 7701. MANIFOLD PRESSURE INDICATOR
REMOVAL AND REPLACEMENT OF MANIFOLD PRESSURE GAUGE.
Refer to Chapter 34 and Removal of Face Mounted Instruments.
TACHOMETER INDICATOR (PA-44-180)
Each tachometer is connected to the engine accessory cover by a flexible cable and provides an indication of
crankshaft speed in revolutions per minute. The instrument has a recording mechanism for recording the time
that the engine is in actual operation. The right-hand tachomter has a reversing drive to correct for the counter-
rotation of the right-hand engine.
— Note —
Tachometer P/N 62177-3 must be used with Hartzell Propeller HC-C2YK-
2CLGF/FJC7666A or HC-2YK-2CGF/FC7666A. For information on the electric
tachometer in the 180T refer to Chapter 61.
TROUBLE CAUSE REMEDY
Excessive error at existing Pointer shifted. Replace instrument.
barometric pressure.
Excessive error when Line Leaking. Tighten line connections.
engine is running.
Sluggish or jerky pointer Defective instrument. Replace instrument.
movement.
Dull or discolored Age. Replace instrument.
marking.
Incorrect reading. Moisture or oil in line. Disconnect lines and blow
out.
PA - 4 4 - 1 8 0 / 1 8 0 T
AIRPLANE MAINTENANCE MANUAL
7 7 - 1 2 - 0 1
Page 77-04
Revised: May 15, 1989
3H6
PIPER AIRCRAFT
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