TM 11-6660-200-14
5-22.
WIND DIRECTION TRANSMITTER SYNCHRO ZEROING. (CONT)
4.
Pull vane shaft housing (6) out of vertical support (5) while pushing up on connector (7).
5.
Remove five screws and wires from synchro (8).
6.
Install test connections on synchro (8) as shown in wiring diagram.
CAUTION
Do not apply power to synchro for more than 30 seconds. Application of power for a longer period of
time will overheat and damage synchro.
NOTE
When synchro is powered up, plate (9) on top of vane shaft (10) will turn to a true north position. Perform
step 7 to bring synchro into alinement.
7.
Turn synchro (8) to aline positioning hole (11) side of plate (9) center line with N-stamp (12)
on vane shaft housing (6).
8.
Disconnect from power source.
9.
Remove test connections from synchro (8).
10.
Using screws (13), install transmitter wiring as shown in table below.
TERMINAL NO.
WIRE COLOR
INDEX NO.
R1
White
14
R2
Black
15
S1
Green
16
S2
Red
17
S3
Orange
18
NOTE
Make sure O-ring (19) is in place on vane shaft housing (6).
11.
Install connector (7) through top of vertical support (5) and pull connector out of bottom.
12.
Install vane shaft housing (6) into top of vertical support (5).
13.
Aline N-stamp (12) on vane shaft housing (6) with mark made on vertical support (5)
during disassembly.
14.
Install three screws (1) and lockwashers (2).
15.
Aline pin 2 (20) on connector (7) with locating pin (21) on vertical support (5).
16.
Install two screws (3) and lockwashers (4).
FOLLOW-ON MAINTENANCE: Install transmitter center section (para 5-16).
5-31
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