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23 Jun 2004 76-00-00 Doc # DA201-C1
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DA20-C1 AMM
Engine Indicating
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CHAPTER 77
ENGINE INDICATING
Engine Indicating
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TABLE OF CONTENTS
CHAPTER 77-00 ENGINE INDICATING ..................................................................................................1
1. General .............................................................................................................................1
2. Description ........................................................................................................................1
TROUBLE SHOOTING...............................................................................................................101
1. General .........................................................................................................................101
MAINTENANCE PRACTICES ....................................................................................................201
1. General .........................................................................................................................201
2. Remove/Install The RPM Indicator...............................................................................201
3. Remove/Install The RPM Indicator Flexible Drive........................................................202
4. Remove/Install The Cylinder Head Temperature Thermocouple Probe ......................204
5. Remove/Install The Exhaust Gas Temperature Thermocouple Probe ........................205
6. Remove/Install The Exhaust Gas Temperature Indicator ............................................206
7. Remove/Install The Cylinder Head Temperature Indicator ..........................................207
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CHAPTER 77-00
ENGINE INDICATING
1. General
This Chapter tells you about the engine performance and temperature indicating systems on the
DA20-C1. A mechanical system operates the RPM indicator In the DA20-C1. The engine has two
temperature indication systems. It has the cylinder head temperature (CHT) indication system.
And it has the exhaust gas temperature (EGT) indication system. Refer to Chapter 28-00 for fuel
system indicating and Chapter 79-00 for oil system indicating.
The engine indicating system has these indicators:
− RPM Indicator.
− Exhaust Gas Temperature (EGT) Indicator.
− Cylinder Head Temperature (CHT) Indicator.
Sensors for the temperature indicators attach to the rear left (number 2) cylinder and to the top left
rear exhaust pipe.
Figure 1 shows the location of the engine performance indicators and sensors.
2. Description
A. RPM Indicator
The RPM indicator is located on the left side of the instrument panel. Four mounting screws on the
front of the instrument panel hold the RPM indicator in position. A flexible gear shaft that rotates
inside a protective cover, gives the drive to the RPM indicator. The flexible shaft connects from the
engine through the engine firewall to the rear of the RPM indicator. Gears inside the RPM indicator
take the mechanical input from the shaft and turn the indicator needle to give the correct RPM
indication.
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19 Dec 1997 77-00-00 Doc # DA 201-C1
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Figure 1: Locations of Engine Indicating Sensors and Indicators
DA20-C1 AMM
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B. Cylinder Head Temperature
The cylinder-head temperature-probe attaches to the bottom of the left rear cylinder. A braided
electrical cable connects the probe to the CHT indicator. The CHT indicator is at the top right of the
instrument panel adjacent to the EGT indicator. The thermocouple in the cylinder-head
temperature-probe generates a voltage that operates the cylinder-head temperature indicator.
C. Exhaust Gas Temperature
The exhaust-gas temperature-probe attaches to the top of the left rear exhaust pipe. A braided
electrical cable connects the probe to the EGT indicator. The EGT indicator is at the top right of the
instrument panel adjacent to the CHT indicator. The thermocouple in the exhaust-pipe
temperature-probe generates a voltage that operates the exhaust-gas temperature indicator.
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钻石20系列AMM 2(103)
