3. Job Set-up
__________ Subtask 29-23-41-860-050
A. Aircraft Maintenance Configuration
WARNING : OBEY THE HYDRAULIC SAFETY PROCEDURES.
_______
(1)
Obey the hydraulic safety procedures (Ref. TASK 29-00-00-910-002).
(2)
Put the warning notice(s) in position to tell persons not to pressurize the Green and Yellow hydraulic systems.
-in the cockpit on the hydraulic section 40VU of the overhead panel,
- on the ground service panel of the Green and Yellow hydraulic systems.
(3)
Make sure that the Green and Yellow hydraulic systems are depressurized and put them in the maintenance configuration (Ref. TASK 29-00-00-864-001).
(4)
Depressurize the reservoirs of the Green and Yellow hydraulic systems (Ref. TASK 29-14-00-614-001).
(5)
Open the left and right main landing gear doors (Ref. TASK 32-12-00-010-001).
(6)
Put the access platform in position.
(7)
Put the container(s) under the hydraulic connections of the power transfer unit.
(8)
Disconnect the isolation coupling of the power transfer unit (PTU) (Ref. TASK 29-23-00-860-001).
1EFF : ALL 1 29-23-41Page 402 1 1 Aug 01/05R 1 1 1CES 1
R Subtask 29-23-41-865-051
R B. Open, safety and tag this(these) circuit breaker(s):
R -------------------------------------------------------------------------------
R PANEL DESIGNATION IDENT. LOCATION
R -------------------------------------------------------------------------------
R 49VU HYD/HYD PWR/B WARN/& CTL 2702GJ C12
R 121VU HYDRAULIC/HYD POWER/Y 3803GX N30
R 121VU HYDRAULIC/Y HYD/PUMP ENG2/CTL 3701GD Q36
R 121VU HYDRAULIC/G HYD/PUMP ENG1/CTL 1701GK R35
R 121VU HYDRAULIC/G HYD/PUMP ENG1/MONG 1702GK R34
R 123VU B HYD/ELEC PUMP 2701GJ AB09
R 123VU Y HYD/ELEC/PUMP 3802GX AB06
R 123VU Y HYD/ELEC/ELEC PUMP/NORM 3801GX AB03
4. Procedure_________
(Ref. Fig. 401/TASK 29-23-41-991-001-A)
Subtask 29-23-41-020-050-A
A. Removal of the Power Transfer Unit
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.
(1)
Loosen the union nut (1) from the case drain port (17) of the Yellow hydraulic system and remove the hose.
(2)
Loosen the union nut (2) from the case drain port (18) of the Green hydraulic system and remove the hose.
(3)
Loosen the union nut (3) from the HP port (6) of the Green hydraulic system and remove the hose
(4)
Disconnect the self-sealing coupling (4) from the LP port (5) of the Green hydraulic system and remove the hose.
(5)
Disconnect the self-sealing coupling (14) from the LP port (13) of the Yellow hydraulic system.
(6)
Loosen the union nut (16) from the HP port (15) of the Yellow hydraulic system and remove the hose.
(7)
Loosen the union nut (9) from the seal drain port (10) and remove the
hose.
(8)
Put blanking plugs on the disconnected line ends.
(9)
Put blanking caps on the ports of the power transfer unit (7).
Green/Yellow Power Transfer Unit 1088GM Figure 401/TASK 29-23-41-991-001-A
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