79-33-01
ALL ú ú C03 Page 403 ú Jul 15/95
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
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CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
(2) S 434-010-C00If you replaced the pressure switch, install the unions on the pressure switch: (a) Lubricate the threads of the unions with engine oil. (b) Install a union on each side of the pressure switch.
(3) S 424-011-C00Install the screws and washers (3 locations) that attach the pressure switch to the mounting bracket.
(4) S 434-012-C00Connect the oil tubes to the pressure switch: (a) Lubricate two new O-rings with engine oil. (b) Install an O-ring on each union. (c) Connect the elbow and the vent pressure tube to the switch.
(5) S 434-013-C00Connect the electrical connector to the low oil pressure warning switch.
(6) S 864-018-C00Remove the DO-NOT-CLOSE tag and close this circuit breaker: (a) P6-3 Load Control Center 1) MASTER DIM
(7) S 794-014-C00When you do the next engine run, do the idle leak check (AMM 71-00-00/501, Test No. 3).
(8) S 714-015-C00When you do the next engine run, do the operational test for the low oil pressure warning system (AMM 79-33-00/501).
(9) S 614-016-C00Fill the engine with oil (AMM 12-13-11/301).
S 414-017-C00
(10) Close the left fan cowl panel (AMM 71-11-02/201).
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79-33-01
ALL ú ú C03 Page 404 ú Jul 15/93
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
////////////////////////A / /
CFM56 ENGINES
737-300/400/500/ /MAINTENANCE MANUAL ////////////////////////
OIL TEMPERATURE INDICATING SYSTEM - DESCRIPTION AND OPERATION
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1. General
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A. The oil temperature indicating system measures the temperature of the engine oil in each engine and provides a visual indication of the oil temperature in the flight compartment.
B. The oil temperature indicating system consists of the oil temperature bulb and the oil temperature indication.
2. Oil Temperature Bulb (Fig. 1)
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A. The oil temperature bulb is a temperature sensitive resistance element enclosed in a metal case. The resistance of the element varies with oil temperature. It is mounted in a boss on the oil scavenge filter and measures the temperature of the oil leaving the oil scavenge filter.
3. Oil Temperature Indication (Fig. 1)
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A. AIRPLANES WITH OIL TEMPERATURE INDICATORS; (AIRPLANES WITHOUT THE ENGINE INSTRUMENT SYSTEM (EIS)); The oil temperature indicator provides a dial/pointer indication of the oil temperature. Two indicators, one for each engine are located on the pilots' center instrument panel, P2. The oil temperature indicator consists of a stationary coil, a moving coil, a pointer attached to the moving coil and a dial face graduated from -50°C to 200°C.
B. AIRPLANES WITH THE ENGINE INSTRUMENT SYSTEM (EIS); The oil temperature indication provides a dial/pointer display of the oil temperature. Two displays, one for each engine, are located on the pilots' center instrument panel, P2, as part of the Secondary Engine and Hydraulics Display. The oil temperature display consists of a dial face graduated from -50°C to 200°C. The range markings are as follows:
-Green: 10 to 160°C
-Amber: 160 to 165°C
-Red Line: 165°C
4. Operation (Fig. 2)
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A. AIRPLANES WITH OIL TEMPERATURE INDICATORS;
(AIRPLANES WITHOUT THE ENGINE INSTRUMENT SYSTEM (EIS));
Refer to the data that follows:
(1) 28 volt ac power is supplied to the oil temperature indicating system from the P6-2 circuit breaker panel. Indicator lighting is 5 volts ac.
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