TM 55-1520-240-23-6
7-116
TEST FLIGHT CONTROL RESERVOIR/COOLER (AVIM)
(Continued)
7-116
FLUID LEVEL TRANSDUCER ADJUSTMENT
28.
Close valve (14).
29.
Apply pressure to pressure port (13) until cylinder
(11) bottoms in reservoir (9).
30.
Mark line on cylinder (11) where cylinder enters
housIng (15). Use marking pencil (E271).
31.
Open valve (14).
32.
Close shutoff valve (8).
33.
Open valve (7) and fill reservoir (9) until mark on
cylinder (11) is 1 inch from empty position.
34.
Connect signal generator (16) to transducer
receptacle (17). Pin numbers 1 and 2.
35.
Connect voltmeter (18) to transducer receptacle
(17). Pin numbers 3 and 4.
36.
Apply 5 volts at 450 Hz to transducer receptacle
(17). Then adjust the voltage until the
milliammeter reads 10 ma.
37.
Open valve (7) to apply 60 psi pressure to return
port (2) until line on cylinder (11) is 2 inches
from housing (15).
38.
Close shutoff valve (7).
39.
Check reservoir (9) fluid level. Fluid level shall
not change.
40.
Remove lockwire from screws (19). Remove two
screws from cylinder (11).
41.
Turn square end of LVDT core (20) until voltmeter
(18) reads 1.653 volts.
42.
Install two screws (19) in cylinder (11). Torque
screws to 20 inch-pounds.
43.
Lockwire screws (19). Use lockwire (E231).
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