Subtask 75-23-10-020-053
 B. Remove the rotor active clearance start bleed (RACSB) valve as follows:
 (1) Disconnect the electrical connectors, Channel A (450) and Channel B

 (460) from the RACSB valve (60). Use soft-jawed pliers if necessary.

 (2) Install blanking caps on the open ends of the electrical connectors and the electrical connectors on the RACSB valve for channel A (450) and Channel B (460).

 (3) Put a container below the area of the drain cap (180) and the fuel manifold (390) of the RACSB valve (60).

 (4) Remove the drain cap (180) of the fuel drain tube (90). Fuel will drain into the container.

 (5) Remove the fuel drain tube (90).

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 RACSB Valve
 Figure 401/TASK 75-23-10-991-300

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 INTENTIONALLY BLANK

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 Removal/Installation of the RACSB Valve
 Figure 402/TASK 75-23-10-991-301- 13 (SHEET 1)
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 Removal/Installation of the RACSB Valve
 Figure 402/TASK 75-23-10-991-301- 23 (SHEET 2)
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 Removal/Installation of the RACSB Valve
 Figure 402/TASK 75-23-10-991-301- 33 (SHEET 3)
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 (6) Install blanking plug on the drain cap fitting, on both ends of fuel drain tube (90) and on the open end of the drain tube (190).

 (7) Remove the bolts (270, 280) and the spacer (290) from the RACSB air tube (70) and the RACSB valve (60).

 (8) Cut the lockwire on the coupling nut of the RACSB air tube (70).
 Disconnect the tube sections at the coupling nut using WRENCH SET,
 SPANNER - AIRTUBE NUTS (856A1612).

 (9) Remove the nut (610) and bolt (570) that attach the loop clamp (620) and the RACSB air tube (70) to the bracket (580).

 (10) Remove the RACSB air tube (70).

 (11) Remove and discard the gasket (260).

 (12) Remove the 4 bolts (130) and the spacer (140) from the upper air start tube (80) and the RACSB valve (60).

 (13) Remove the bolts (640), nuts (670) and washers (660) that attach the retaining strap (630) and the upper air start tube (80) to the bracket (650).

 (14) Cut the lockwire and remove the bolts (560) that attach the upper air start tube (80) to the combustion case.

 (15) Remove the upper air start tube (80).

 (16) Remove the e-seal (550).

 (17) Remove and discard the gasket (150).

 (18) Remove the 4 bolts (420) from the fuel manifold (390) and remove the spacer (510) from the fuel manifold (390).

 (19) Remove and discard the gasket (430) from between the fuel manifold

 (390) and the RACSB valve (60).

 (20) Remove the 4 bolts (210) from the lower air start tube (100) and the RACSB valve (60).

 (21) Remove the bolts (220, 230) from the RACSB discharge tube (110) and the RACSB valve (60).

 (22) Remove and discard the gaskets (200, 240) and the orifice plate (250).

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 (23) Move the bracket assembly (300) away from the RACSB valve (60). NOTE : It should not be necessary to remove items from the bracket

____
 assembly (300).

 (24) If necessary, loosen the loop clamps (350, 380) that attach the fuel manifold tubes (390) by removing the bolts (370, 490) and nuts (360, 400) to get adequate clearance with the tubes when the RACSB valve is removed.

 (25) Remove the RACSB valve: CAUTION : PROVIDE SUPPORT FOR THE RACSB VALVE AS YOU REMOVE THE BOLTS
　
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