Zenair CH2000 - Manifold Pressure Gauge; Replacement of Instruments

ZENAIR CH2000 SERVICE MANUAL
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MANIFOLD PRESSURE GAUGE
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.
TROUBLESHOOTING
MANIFOLD PRESSURE GAUGE
Trouble
Cause
Remedy
Excessive error at existing
barometric pressure.
Pointer shifted.
Replace instrument.
Excessive error when
engine is running.
Line leaking.
Tighten line connections.
Sluggish or jerky pointer
movement.
Improper damping
adjustment.
Adjust damping screw.
Broken or loose cover glass.
Vibration or excessive
pressure.
Replace glass and reseat
case.
Dull or discolored luminous
markings.
Age.
Replace instrument.
Incorrect reading.
Moisture or oil in line.
Disconnect lines and blow
out.
REPLACEMENT OF INSTRUMENTS - Fig. 21
GENERAL
Since all instruments are mounted in a similar manner, a description of a typical removal and
installation is provided as a guide for the removal and installation of the instruments. Special care
should be taken when any operation pertaining to the instruments is performed.
Remove the connections to the instrument and remove the mounting screws of the instrument.
Note: Tag connections for ease of reinstallation.
Installation of the instruments will be in the reverse order given for removal. After the
installation is completed, check all components for clearance of the control column, condition,
proper operation and safety.
3 Apr 95 9.13