EGT INDICATOR CHECK (Figure 2-4).

TM 55-4920-244-14

Figure 2-3. Installation of heater probes in engine (sheet 1 of 2).

e. One or more engine thermocouples inoperative in

(8) If system is within tolerances, secure tester in

accordance with paragraph 2-14.

engine paralleling harness (para. 2-16).

2-7. USING TESTER TO TROUBLESHOOT

f. Engine thermocouple harness errors (para. 2-15).

EGT SYSTEM.

g. Transpositions (crossing of lead wires) (para. 2-13).

If the egt system error exceeds applicable technical

manual tolerance, one or more of the causes listed below

h. Engine thermocouples out of calibration (para.

will probably be the source of trouble. The complete egt

2-16).

system and all of its components must be correct before

2-8. EGT INDICATOR CHECK (Figure 2-4).

the egt system can be used for reliable exhaust gas

temperature pickup. The possible sources of trouble are:

a. Connect egt indicator check adapter to instrument

a. EGT indicator error (para. 2-8).

cable and instrument cable to connector P-3.

b. Resistance of circuit out of tolerance (para. 2-9),

b. Before removing EGT indicator from instrument

panel, install slippage mark from indicator case to panel

to insure correct reinstallation position. Adjust EGT in-

c. Shorts to ground (para. 2-10).

dicator in normal operating position while in instrument

d. Shorts between leads (para. 2-11).

panel.

Change 3