6) Remove the used resistance spool.
7) Replace the old resistance spool with a new resistance
spool or a spare resistance spool.
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8) Remove the insulation from the end of the wire at the center of the new resistance spool.
9) With the soldering iron, connect the clean end of the wire to the coarse adjustment terminal A5.
10) Connect one lead of the wheatstone bridge or the multimeter to the vernier adjustment terminal B3.
11) Remove sufficient insulation from the loose end of the resistance wire to make a good connection with the lead of the wheatstone bridge or the multimeter.
12) Connect the lead of the wheatstone bridge or the multimeter to the wire.
13) Measure the circuit resistance.
14) Make a record of the circuit resistance.
15) Wind off the necessary quantity of wire to get the correct resistance.
NOTE: 1 foot of the wire is equal to 0.7 ohms.
____
16) Remove sufficient insulation from the resistance wire to make a good connection with the lead for the wheatstone bridge or the multimeter.
17) Connect the other lead of the wheatstone bridge or the multimeter to the resistance wire.
18) Move the lead of the wheatstone bridge or the multimeter down the resistance wire until you find the correct resistance value.
NOTE: As the lead of the wheatstone bridge or the
____ multimeter moves down the resistance wire, remove the insulation from the resistance wire.
19) Cut the resistance wire at the location for the correct resistance value.
20) Make sure you remove all the insulation from the resistance wire.
21) Wind up the unwanted resistance wire in the resistance spool and one time around the center post.
NOTE: Let a sufficient length of the resistance wire
____ stay so you can solder the resistance wire to the vernier adjustment terminal B3.
22) With the soldering iron, connect the end of the resistance wire to the vernier adjustment terminal B3.
23) Remove the jumper from pin 1 and pin 2 of the connector for the EGT indicator.
24) Do step 3.C.(5) to make sure the circuit resistance agrees with Table 501.
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////////////////////////A / GTCP85-129 SERIES /737-300/400/500/ ENGINES/MAINTENANCE MANUAL ////////////////////////
S 435-019
(7)
If the circuit resistance agrees with Table 501, disconnect the wheatstone bridge or the multimeter.
S 435-020
(8)
Connect the electrical connectors:
(a)
Remove the jumper from between pin A and pin B of the connector D1102 for the APU engine lead.
(b)
Connect the connector D1102 for the APU engine lead to the EGT receptacle in the upper shroud.
(c)
Connect the connector D446 to the EGT indicator on the P5 forward overhead panel.
S 415-021
CAUTION: KEEP A MINIMUM CLEARANCE OF 0.18 INCHES (5 MM) BETWEEN THE
_______ ENGINE, FIRE DETECTOR, CLAMPS AND LOWER SHROUD.
BE CAREFUL WHEN YOU MOVE THE LOWER SHROUD. DAMAGE TO THE SHROUD DRAIN LINES CAN OCCUR.
(9) Install the lower shroud:
(a)
Hold the lower shroud against the upper shroud.
(b)
Close the shroud latches.
S 415-022
(10) Close the APU cowl door:
(a)
Disconnect the door support rods.
(b)
Put the door support rods in the clips on the APU cowl door.
(c)
Close the APU cowl door.
(d)
Close the latches for the APU cowl door.
S 865-023
(11) Set the circuit breaker and the switch:
(a)
Remove the DO-NOT-CLOSE tag and close this circuit breaker: 1) E3-3 Electrical Shelf, APU Control Unit
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