____
 (1)
 Make sure that the C/Bs 1GG and 2GG are closed

 (2)
 Open, safety and tag the C/Bs 3GG and 4GG

 (3)
 On the panel 402VU, put the A/SKID & N/W STRG switch in OFF position

 (4)
 Disconnect the connector from the RVDT 3GC

 (5)
 Connect the SENSOR-VOLTAGE TEST (F26792000) or SENSOR - VOLTAGE TEST between the connector and the RVDT 3GC.

 (6)
 On the panel 402VU, put the A/SKID & N/W STRG switch in ON position

 (7)
 Connect a AC voltmeter

 (8)
 Stage 1:

 (a)
 On the SENSOR-VOLTAGE TEST (F26792000) or SENSOR - VOLTAGE TEST

 (18) set the selector switch to U1.

 (b)
 Record the voltage (U1).

 (c)
 On the SENSOR-VOLTAGE TEST (F26792000) or SENSOR - VOLTAGE TEST

 (18) set the selector switch to U2.

 (d)
 Record the voltage (U2).

 (e)
 From the voltages U1 and U2, calculate the voltage U: U = U1 - U2

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 (9) If the voltage U is not equal to 0 +/- 20mV, adjust the gear box:
 (a)
 Remove the RVDT 3GC (16) (Ref. TASK 32-51-19-000-001).

 (b)
 On the ADJUSTING TOOL - NWS GEARBOX (F26630200) (13), loosen the two knurled adjusters (14) so that the inner part of the ADJUSTING TOOL - NWS GEARBOX (13) can turn freely.

 (c)
 Install the ADJUSTING TOOL - NWS GEARBOX (13) on the N/WS gearbox

 (10)
 -put the stud (22) of the ADJUSTING TOOL - NWS GEARBOX (13) in the drive slot (23) of the gearbox plate (12),
 -attach the ADJUSTING TOOL - NWS GEARBOX (13) on the gearbox
 (10) with the screws (15).

 (d)
 Install the RVDT 3GC (16) (Ref. TASK 32-51-19-400-001)

 - engage the spigot (20) in the hole (21) on the ADJUSTING TOOL -NWS GEARBOX (13),
 -make sure that it is flush with the N/WS gearbox (10).
 NOTE : Lightly lubricate the packing of the sensor (16) with
____
 COMMON GREASE (Material No. 04-015).

 (10)
 Stage 2:

 (a)
 On the SENSOR-VOLTAGE TEST (F26792000) or SENSOR - VOLTAGE TEST

 (18) set the selector switch to U1.

 (b)
 Record the voltage (U1*).

 (c)
 On the SENSOR-VOLTAGE TEST (F26792000) or SENSOR - VOLTAGE TEST

 (18) set the selector switch to U2.

 (d)
 Record the voltage (U2*).

 (e)
 From the voltages U1* and U2*, calculate the voltage U*: U* = U1* - U2*

 (11)
 Stage 3:

 (a) Calculate the algebraic value T that has been introduced with the ADJUSTING TOOL - NWS GEARBOX (13) installed between the RVDT 3GC
 (16) and the N/WS gearbox (10):
 T = U - U*

 (12)
 Remove the RVDT 3GC (16) (Ref. TASK 32-51-19-000-001).

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 (13)
 Carefully loosen the screws (11) through elongated holes of the ADJUSTING TOOL - NWS GEARBOX (13). Leave the ADJUSTING TOOL - NWS GEARBOX (13) installed.

 (14)
 Install the RVDT 3GC (16) (Ref. TASK 32-51-19-400-001).

 (15)
 Stage 4:

 (a)
 On the SENSOR-VOLTAGE TEST (F26792000) or SENSOR - VOLTAGE TEST (18), set the selector switch to U1 and then U2.

 (b)
 On the ADJUSTING TOOL - NWS GEARBOX, adjust the two knurled adjusters (14). (this will move the drive plate (12) of the gearbox (10)) until you get:

 U1 = U2 (plus or minus 10mV)
 This figure is the value U (reference)

 NOTE : When you turn the knurled adjusters, the gear box plate
____ (12) moves and changes the secondary voltages U1 and U2. When you turn the knurled adjuster:
 -
in one direction, U1 increases and U2 decreases,

 -
in the other direction, U2 increases and U1 dcreases.

 (16) Stage 5:
 (a)
 On the SENSOR-VOLTAGE TEST (F26792000) or SENSOR - VOLTAGE TEST (18), set the selector switch to U1.

 (b)
 Adjust the two knurled adjusters (14) again (this will compensate the value T put in with the installation of the ADJUSTING TOOL -NWS GEARBOX (13) until you get:

 U1 = U (reference) minus (T/2) (plus or minus 10mV) This figure is the value U (final)
 (17)
 Tighten the two knurled adjusters (14). Make sure that the position of the drive plate does not move.

 (18)
　
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