(j) Remove the check valve 2022GM as follows: 1 Loosen the check valve 2022GM and remove it at the same time
_ with the O-ring (58).
 2 Remove and discard the O-ring (58).
_
 (k) Remove the check valve 2057GM as follows: 1 Loosen the check valve 2057GM and remove it at the same time
_ with the O-ring (11).
 2 Remove and discard the O-ring (11).
_
 (l) Remove the nine bobbins (12), (21), (23), (30), (39) (Ref. TASK 20-23-21-911-001).
 NOTE : There are three different sizes of bobbins.
____
 (m)
 Install the blanking plugs in the open ports of all of the removed components.

 (n)
 Install the blanking plugs in the open ports of the manifold (26).

 (o)
 Remove and discard these items from the bobbins:

 -
the square-section seals (13), (22), (24), (31), (40)

 -
the O-rings (87), (90), (93), (94), (97)

 -
the back-up rings (85), (86), (88), (89), (91), (92), (95), (96), (98), (38).

 (p)
 Put the bobbins into the BAG - PLASTIC to keep them clean.

 (2) Install the removed parts on the replacement manifold (26) as follows:
 NOTE : If the replacement manifold (26) was not installed before,
____ then you must install the threaded inserts (25) and the cylindrical pin (14).
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 (a)
 Remove the blanking plugs from the manifold (26) and the components.

 (b)
 Apply the HYDRAULIC FLUIDS (Material No. 02-003) to the new O-rings and the threads of the unions.

 (c)
 Install the check valve 2057GM as follows:

 (d)
 Install the check valve 2022GM as follows: 1 Put the new O-ring (58) in position on the check valve 2022GM.

 1_ Put the new O-ring (11) in position on the check valve 2057GM.
 2_ Install the check valve 2057GM in port C of the manifold (26).
 3_ TORQUE the check valve 2057GM to between 3.19 and 3.47 m.daN
 (23.52 and 25.58 lbf.ft).

_
 2 Install the check valve 2022GM in port G of the manifold (26).

_
 3 TORQUE the check valve 2022GM to between 4.32 and 4.61 m.daN

_

 (31.85 and 33.99 lbf.ft).
 (e) Install the check valve 2059GM as follows: 1 Put the new O-ring (43) in position on the check valve 2059GM.
_ 2 Put the new back-up rings (44) and the new O-ring (45) in
_
 position on the check valve 2059GM. 3 Install the check valve 2059GM in the manifold (26).
_ 4 TORQUE the check valve 2059GM to between 6.26 and 6.83 m.daN
_
 (46.16 and 50.36 lbf.ft). 5 Safety the check valve 2059GM with the lockwire, MISCELLANEOUS
_ (Material No. 19-010).
 (f)
 Install the fluid sampling valve 2187GM (Ref. TASK 29-12-34-400-001).

 (g)
 Install the system pressure switch 2151GN (Ref. TASK 29-32-12-400-002).

 (h)
 Install the flight-control pressure switch 10CE1 (Ref. TASK 27-92-17-400-003).

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 (i)
 Install the hydraulic pressure transducer 2065GN (Ref. TASK 29-32-11-400-002).

 (j)
 Apply the HYDRAULIC FLUIDS (Material No. 02-003) to the new square-section seals, back-up rings and the O-rings.

 (k)
 Put the two new back-up rings (85) in position on the sides of the bobbins (12) without the identification grooves (equipment side).

 (l)
 Put the two new square-section seals (13) in position on the sides of the bobbins (12) without the identification grooves (equipment side).

 (m)
 Put the two new back-up rings (86) in position on the sides of the bobbins (12) with the identification grooves (manifold side).

 (n)
 Put the two new O-rings (87) in position on the sides of the bobbins (12) with the identification grooves (manifold side).

 (o)
 Install the two bobbins (12) with the identification grooves in the ports of the manifold (26) (Ref. TASK 20-23-21-911-001).

 (p)
 Put the two new back-up rings (88) in position on the sides of the bobbins (21) without the identification grooves (equipment side).

 (q)
 Put the two new square-section seals (22) in position on the sides of the bobbins (21) without the identification grooves (equipment side).

 (r)
 Put the two new back-up rings (89) in position on the sides of the bobbins (21) with the identification grooves (manifold side).
　
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