LANCE II SERVICE MANUAL
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.
1045. TROUBLESHOOTING.
TABLE
X-VIII. MANIFOLD PRESSURE
INDICATOR
Trouble
Cause
Remedy
Excessive error at
existing barometric
pressure.
Excessive error when
engine is running.
Sluggish or jerky
pointer movement.
Pointer shifted.
Line
leaking.
Defective instrument.
Replace instruments.
Tighten line connections.
Replace instrument.
Dull or discolored
marking.
Age.
Replace instrument.
Incorrect reading.
Moisture or oil in
line.
On 32RT-300 disconnect
lines and blow out.
On 32RT-300T open
manifold
pressure
line
purge valve
behind gauge
with engine at idle.
1046. REMOVAL AND REPLACEMENT. Refer to Paragraph 10-76 of this section.
1047. TACHOMETER INDICATOR.
1048. GENERAL.
The tachometer is connected
to the engine accessory by a flexible cable
and angle drives 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.
Isued: 1/3/78
INSTRUMENTS
2E23
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