INDICATING
VACUUM GAUGE
A suction gauge is mounted on the right side of the instrument panel. This gauge is calibrated in inches of
mercury and indicates the amount of vacuum in the system. The suction gauge has a direct pressure line and a
vent line. These aircraft indicate differential pressure or actual pressure being applied to gyro instruments. As
system filter becomes clogged or lines obstructed, gauge will show a decrease in pressure. Do not reset
regulator until the filter and lines have been checked.
REMOVAL OF VACUUM SENSOR
The sensor unit is located under the instrument panel on the vacuum regulator. Remove the sensor as
follows:
1. Disconnect two electrical leads.
2. Unscrew sensor unit from vacuum regulator.
3. Cover hole to prevent foreign matter from entering regulator.
INSTALLATION OF VACUUM SENSOR
l. Screw sensor unit into vacuum regulator.
2. Reconnect two electrical leads.
3. Perform operational check.
THIS SPACE INTENTIONALLY LEFT BLANK
37 - 21 - 00
Page 37 - 08
Reissued: August 1, 1986
2E10
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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