Subtask 29-11-42-560-050
A. Preparation of the Replacement Component
(1)
Remove the parts which are attached to the removed accumulator (14) as follows:
(a)
Remove the union (5) and the O-ring (6).
(b)
Remove and discard the lockwire from the adapter (11).
(c)
Remove the adapter (11) together with the charging valve (13) and the pressure gage (12).
(d)
Remove the O-ring (10) from the accumulator (14).
(e)
Discard the O-rings (6),(10).
(2)
Install the removed parts on the replacement accumulator as follows:
(a)
Remove the blanking caps from the accumulator (14).
(b)
Clean the union (5) and the adapter (11) and make sure that they are in good condition.
(c)
Lubricate the new O-ring (6) and the new O-ring (10) and all threads with HYDRAULIC FLUIDS (Material No. 02-003).
(d)
Install the O-ring (6) on the removed union.
(e)
Install the union (5) and TORQUE to between 6.258 and 6.827 m.daN
(46.15 and 50.34 lbf.ft).
(f)
Install the O-ring (10) on the removed adapter (11).
(g)
Install the adapter (11) together with the pressure gage (12) and the air charging valve (13).
(h)
TORQUE the adapter (11) to between 1.08 and 1.19 m.daN (95.57 and
105.30 lbf.in).
(i)
Safety the adapter (11) with lockwire, corrosion resistant steel
0.8 mm (0.032 in.).. Subtask 29-11-42-420-050
B. Installation of the Power Accumulator CAUTION : USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN
_______ YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU USE THE SECOND WRENCH, YOU WILL NOT LOOSEN OR TIGHTEN THE UNION TOO MUCH.
CAUTION : YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS
_______
LUBRICANT.
(1)
Clean the component interface and/or the adjacent area.
(2)
Do an inspection of the component interface and/or the adjacent area.
(3)
Remove all blanking caps.
(4)
Fill up the accumulator assembly with HYDRAULIC FLUIDS (Material No. 02-003).
(5) Put the accumulator assembly in its mounting and install the washer (4) and the nut (3).
NOTE : Install the accumulator assembly so that you can easily read____ the pressure gage and you have good access to the charging valve.
(6) Install the clamps (7) and tighten the screws.
(7) Make sure that the hydraulic line end-fittings are serviceable.
(8) Install the union nut (2) on the union (5).
(9) TORQUE the union nut (2) to between 9.7 and 10.7 m.daN (71.53 and 78.90 lbf.ft).
(10) Apply HYDRAULIC FLUIDS (Material No. 02-003) to the threads of the line end fitting.
(11) Install the hydraulic line free of stress with the union nut (1) on the union (2).
(12) TORQUE the union nut (1) to between 9.7 and 10.7 m.daN (71.53 and 78.90 lbf.ft).
Subtask 29-11-42-790-050
C. Test of the Power Accumulator
(1) Fill the accumulator with nitrogen (Ref. TASK 12-14-29-614-001).
(2) Remove the warning notices from the ground service panel of the Green hydraulic system and from the cockpit.
(3) Pressurize the reservoir of the Green hydraulic system (Ref. TASK 29-14-00-614-002).
R R R (4) Make sure that the fluid level in the reservoir of the Green hydraulic system is correct. Add fluid as necessary (Ref. TASK 12-12-29-611-001).
R (5) Pressurize the Green hydraulic system (Ref. TASK 29-10-00-863-001).
R (6) Examine the accumulator connections and make sure that there are no hydraulic fluid or nitrogen leaks.
R (7) Make sure that the pressure gage (11) shows 3000 +100 -100 psi.
R (8) Depressurize the Green hydraulic system (Ref. TASK 29-00-00-864-001).
R R (9) Do the bleeding procedure of the Green hydraulic system downstream of the engine pump (Ref. TASK 29-00-00-870-003).
R R R NOTE : When you do the bleeding procedure, nitrogen, which has gone____ into the hydraulic system from the defective accumulator, is removed.
5. Close-up________
Subtask 29-11-42-860-051
A. Put the aircraft back to the serviceable condition.
(1) Make sure that the fluid level in the reservoir of the Green hydraulic system is correct. Add fluid as necessary (Ref. TASK 12-12-29-611-001).
(2) Connect the PTU isolation coupling (Ref. TASK 29-23-00-860-002).
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