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C I R R U S

 

A I R P L A N E   M A I N T E N A N C E   M A N U A L

M O D E L  S R 2 2

79-30

Page 1

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EFFECTIVITY:

 INDICATING

1.

DESCRIPTION

This section describes that portion of the oil system which is used to indicate the quantity, temperature, 
and pressure of the oil. Components included are the oil filler cap/dipstick, oil pressure/temperature gage, 
oil pressure sensor, and oil temperature sensor.

An oil filler cap/dipstick is located at the rear of the engine on the top left side and is accessed through the 
oil filler door on the upper cowling. The engine oil tank capacity is 8 quarts (7.57 L). Refer to Chapter 12, 
Servicing for approved engine oil specifications and servicing procedures. 

(Refer to 12-10)

Serials 0002 thru 1601, 1603 thru 1643, 1645 thru 1662:

 A 2¼” combination Oil Pressure and Oil Temper-

ature Gage is mounted on the right instrument panel immediately below the EGT/CHT gage. The instru-
ment is internally lighted. The oil pressure pointer sweeps a scale marked from 0 psi to 100 psi. The oil 
pressure gage receives a signal from a pressure sensor mounted at the aft end of the engine below the oil 
cooler. Normally, oil pressure may drop to 10 psi at idle but will be in the 30 - 60 psi range at higher RPM. 
The oil temperature pointer sweeps a scale marked from 75° F to 250° F in 25° F increments. The oil tem-
perature gage receives a signal from a temperature sensor mounted at the lower left side of the engine 
below the oil cooler. 28 VDC for instrument operation is supplied through the 5-amp ENGINE INST circuit 
breaker on the Essential Bus.

Serials 1602, 1644, 1663 & subs:

 Oil pressure is displayed in the upper right corner of the MFD as both a 

simulated pressure gage and as text. The simulated pressure gage receives a signal from a pressure sen-
sor mounted at the aft end of the engine below the oil cooler via the Data Acquisition Unit (DAU). The sim-
ulated pressure gage sweeps a scale marked from 0 psi to 100 psi in 5 psi increments. Oil pressure is also 
continuously displayed in the engine parameters field located in the lower right corner of the PFD. In the 
event oil pressure falls below 30 psi or exceeds 75 psi, the MFD will display “Check Oil Pressure” in a yel-
low advisory box in the lower right corner of the MFD. If oil pressure falls below 10 psi or exceeds 99 psi, 
the MFD will display “Check Oil Press” in a red advisory box.

Oil temperature is displayed in the upper right corner of the MFD as both a simulated temperature gage 
and as text. The simulated temperature gage receives a signal from a temperature sensor mounted at the 
lower left side of the engine below the oil cooler via the Data Acquisition Unit (DAU). The simulated temper-
ature gage pointer sweeps a scale marked from 75° F to 250° F in 10° F increments. In the event oil tem-
perature reaches 235° F, the MFD will display “Monitor Oil Temperature” in a cyan advisory box in the lower 
right corner of the MFD. If oil temperature exceeds 240° F, the MFD will display “Check Oil Temperature” in 
a red advisory box in the lower right corner of the MFD. 28 VDC for the digital instrument operation is sup-
plied through the 2-amp ANNUN / ENGINE INST circuit breaker on the Essential Bus.

15 Apr 2007

Summary of Contents for SR22

Page 1: ...ed through the 5 amp ENGINE INST circuit breaker on the Essential Bus Serials 1602 1644 1663 subs Oil pressure is displayed in the upper right corner of the MFD as both a simulated pressure gage and as text The simulated pressure gage receives a signal from a pressure sen sor mounted at the aft end of the engine below the oil cooler via the Data Acquisition Unit DAU The sim ulated pressure gage sw...

Page 2: ...1 60 d Disconnect electrical connector from gage e Remove screws and washers securing gage to instrument panel Remove gage from air plane 2 Installation Oil Pressure Temperature Gage a Position gage to instrument panel and secure with screws and washers b Connect electrical connector to gage c Install MFD Refer to 31 60 d Reset ENGINE INST circuit breaker e Perform Operational Test Oil Pressure Te...

Page 3: ...re is displayed on the MFD screen 1 Operational Test Oil Pressure Temperature Gage a Set BAT1 and AVIONICS switches to ON positions b On MFD when PRESS ANY BEZEL KEY TO CONTINUE is displayed press any key c If Engine Monitoring is selected press Fuel Done to enter Map page d Rotate left knob to select Engine page e Verify oil temperature needle indicates bottom of scale f Verify oil pressure needl...

Page 4: ...603 thru 1643 1645 thru 1662 Pull ENGINE INST circuit breaker c Serials 1602 1644 1663 subs Pull ANNUN ENGINE INST circuit breaker d Remove engine cowling Refer to 71 10 e Disconnect electrical connector from sensor f Remove sensor from engine 2 Installation Oil Pressure Sensor a Position sensor to engine and install b Connect electrical connector to sensor c Install engine cowling Refer to 71 10 ...

Page 5: ...ove engine cowling Refer to 71 10 e Disconnect electrical lead from sensor f Remove safety wire securing sensor to engine g Remove sensor and washer from engine Discard washer 2 Installation Oil Temperature Sensor a Acquire necessary tools equipment and supplies b Position new washer and sensor to engine and install c Connect electrical lead to sensor d Safety wire sensor to oil cooler Refer to 20...

Page 6: ... oil pressure temperature warning light is integrated into the annunciator assembly mounted top cen ter above the flight instruments The oil light will illuminate if the oil temperature exceeds 240 F 116 C or if the oil pressure is less than 10 psi 68 9 kPa For maintenance practices pertinent to the annunciator assembly see Indicating and Recording Refer to 31 50 ...

Page 7: ...ssure and Oil Temperature Indication Sheet 1 of 2 SR22_MM79_1474C OIL COOLER REF LEGEND 1 Oil Pressure Gage 2 Oil Temperature Gage 3 Screw 4 Washer 5 Connector 6 Oil Pressure Sensor 7 Oil Temperature Sensor 8 Wire Harness Terminal Ring 9 Nut 9 4 8 9 6 5 7 4 5 1 2 4 3 Serials 0002 thru 1601 1603 thru 1643 1645 thru 1662 15 Apr 2007 ...

Page 8: ...R R U S A I R P L A N E M A I N T E N A N C E M A N U A L M O D E L S R 2 2 15 Apr 2007 Figure 79 301 Oil Pressure and Oil Temperature Indication Serials 1602 1644 1663 subs Sheet 2 of 2 SR22_MM79_2232 LEGEND 1 Oil Pressure Gage 2 Oil Temperature Gage 1 2 2 1 ...

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