Installation of the Power Transfer Unit (PTU) Manifold of the Yellow Hydraulic System

TASK 29-13-15-400-001-A
Installation of the Power Transfer Unit (PTU) Manifold of the Yellow Hydraulic System

WARNING: MAKE SURE THAT THE GROUND SAFETY-LOCKS ARE IN POSITION ON THE LANDING GEAR. THIS WILL PREVENT UNWANTED MOVEMENT OF THE LANDING GEAR, AND THUS POSSIBLE INJURY TO PERSONS AND DAMAGE TO THE AIRCRAFT AND/OR EQUIPMENT.

FIN: 3015GM

1. Reason for the Job
Self explanatory
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE
No specific	1	BAG - PLASTIC
No specific	1	CONTAINER 4 L (1 USGAL)
No specific	AR	PLUG - BLANKING
No specific	1	SCRAPER - NON METALLIC
No specific	2	WARNING NOTICE(S)
No specific	Torque wrench: range to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )
No specific	Torque wrench: range to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )
No specific	Torque wrench: range to between 10.7 and 9.7 m.daN (78.91 and 71.53 lbf.ft )
No specific	Torque wrench: range to between 14.2 and 12.9 m.daN (104.72 and 95.13 lbf.ft )

B. Consumable Materials

REFERENCE	DESIGNATION
(Material No.02ABA1)	Phosphate Ester Hydraulic Fluid-General Power - -
(Material No.06AEA1)	Polysulfide Sealant-Low Adhesion Brushable -
(Material No.14QEB1)	Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -
(Material No.14QFB1)	Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -

C. Expendable Parts

FIG.ITEM	DESIGNATION	IPC-CSN
23	PACKING	AIPC 29-13-15-02-060
47	PACKING	AIPC 29-13-15-02-060
53	PACKING	AIPC 29-13-15-02-060
35	PACKINGS	AIPC 29-13-15-02-110
36	BACK-UP RINGS	AIPC 29-13-15-02-120
37	BACK-UP RINGS	AIPC 29-13-15-02-130
10	SQUARE-SECTION SEALS	AIPC 29-13-15-02-140
51	PACKING	AIPC 29-13-15-02-220
52	PACKING	AIPC 29-13-15-02-310

D. Referenced Information

REFERENCE	DESIGNATION
TASK 20-23-21-911-001-A	Removal/Installation of the Bobbins from their Housings and Installation of O-rings, Square Seals, and Back-up Rings on the Bobbins
TASK 29-00-00-864-001-A	Put the Related Hydraulic System in the Depressurized Configuration before Maintenance Action
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-13-33-000-001-A	Removal of the Priority Valve of the Yellow Hydraulic System
TASK 29-13-33-400-001-A	Installation of the Priority Valve of the Yellow Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-14-00-614-002-A	Pressurization of the Hydraulic Reservoirs through the Ground Connector
TASK 29-14-00-614-002-A-01	Pressurization of the Hydraulic Reservoirs with the Auxiliary Power Unit (APU)
TASK 29-23-00-710-002-A	Functional Check of the Power Transfer Unit (PTU) Green to Yellow
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 29-23-00-860-002-A	Connection of the Isolation Coupling of the Power Transfer Unit (PTU)
TASK 32-12-00-010-001-A	Open the Main Gear Doors for Access
TASK 32-12-00-410-001-A	Close the Main Gear Doors after Access
PTU Manifold
Wire Locking of the Coupling and the Attachment Bolts

3. Job Set-up
Subtask 29-13-15-860-053-A

A. Aircraft Maintenance Configuration

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

(1) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(2) Make sure that the WARNING NOTICE(S) are in position to tell persons not to pressurize the Yellow hydraulic system:

in the cockpit on the hydraulic section 40VU of the overhead panel,
on the ground service panel of the Yellow hydraulic system.

(3) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-00-00-864-001).
(4) Make sure that the reservoir of the Yellow hydraulic system is depressurized (Ref. AMM TASK 29-14-00-614-001).
(5) Make sure that the main doors of the main gear are open (Ref. AMM TASK 32-12-00-010-001).
(6) Make sure that the ACCESS PLATFORM 3M (10 FT)- ADJUSTABLE is in position at the main doors of the main gear.
(7) Make sure that the CONTAINER 4 L (1 USGAL) is in position below the location of the PTU manifold.
(8) Make sure that the isolation coupling of the Power Transfer Unit (PTU) is disconnected (Ref. AMM TASK 29-23-00-860-001).

Subtask 29-13-15-865-051-A

B. Make sure that this(these) circuit breaker(s) is(are) open, safetied and tagged:

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

4. Procedure
Subtask 29-13-15-560-050-C

A. Preparation of the Replacement Component
(1) Remove the components which are attached to the removed manifold (7) as follows:
(a) Remove the priority valve 3064GM (Ref. AMM TASK 29-13-33-000-001).
(b) Remove the bobbins (9) (Ref. AMM TASK 20-23-21-911-001).
(c) Remove and discard these items from the bobbins:

the square section seals (10)
the back-up rings (36) and (37)
the packings (35).

(d) Put the bobbins (9) into a BAG - PLASTIC to keep them clean.
(e) Remove the check valve 3093GM and discard the packing (23).
(f) Remove the coupling half (46) and discard the packing (47).
(g) If necessary, remove the union (50) and discard the packing (51).
(h) If necessary, remove the reducer (5) and discard the packing (52).
(i) If necessary, remove the union (13) and discard the packing (53).
(j) Install a PLUG - BLANKING on the open ports of the manifold (7).
(k) Install the blanking plugs on all of the removed components.
(2) Install the removed components on the replacement manifold (7) as follows:
(a) Remove the blanking plugs from the manifold (7) and the components.
(b) Lubricate the new packings and the threads of the components with Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) .
(c) If removed, install the union (13) with a new AIPC 29-13-15-02-060 PACKING (53).
(d) TORQUE the union (13) to between 10.7 and 9.7 m.daN (78.91 and 71.53 lbf.ft )

.
(e) If removed, install the reducer (5) with a new AIPC 29-13-15-02-310 PACKING (52).
(f) TORQUE the reducer (5) to between 10.7 and 9.7 m.daN (78.91 and 71.53 lbf.ft )

.
(g) If removed, install the union (50) with a new AIPC 29-13-15-02-220 PACKING (51).
(h) TORQUE the union (50) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(i) Put the new AIPC 29-13-15-02-060 PACKING (47) in position on the coupling half (46).
(j) Install the coupling half (46) on the manifold (7).
(k) TORQUE the coupling half (46) to between 10.7 and 9.7 m.daN (78.91 and 71.53 lbf.ft )

.
(l) Put the new AIPC 29-13-15-02-060 PACKING (23) in position on the check valve 3093GM.
(m) Install the check valve 3093GM in the port D of the manifold (7).
(n) TORQUE the check valve 3093GM to between 10.7 and 9.7 m.daN (78.91 and 71.53 lbf.ft )

WARNING: USE PROTECTIVE GOGGLES AND GLOVES WHEN YOU REMOVE OR INSTALL LOCKWIRE. EACH TIME YOU CUT LOCKWIRE, REMOVE AND DISCARD IT IMMEDIATELY. LOOSE LOCKWIRE CAN CUT YOU OR MAKE YOU BLIND, AND/OR CAN CAUSE DAMAGE.

(o) Safety the check valve 3093GM with the lockwire, 14QEB1Wire-Locking Dia: 0.6 mm CRES Nickel Alloy -.
(p) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the new square-section seals, back-up rings and packings.
(q) Put the new AIPC 29-13-15-02-130 BACK-UP RINGS (37) on the side of the bobbins (9) without the identification grooves (equipment side).
(r) Put the new AIPC 29-13-15-02-140 SQUARE-SECTION SEALS (10) on the side of the bobbins (9) without the identification grooves (equipment side).
(s) Put the new AIPC 29-13-15-02-120 BACK-UP RINGS (36) on the side of the bobbins (9) with the identification grooves (manifold side).
(t) Put the new AIPC 29-13-15-02-110 PACKINGS (35) on the side of the bobbins (9) with the identification grooves (manifold side).
(u) Install the bobbins (9) with the identification grooves in the ports of the manifold (7) (Ref. AMM TASK 20-23-21-911-001).
(v) Install the priority valve 3064GM (Ref. AMM TASK 29-13-33-400-001).

Subtask 29-13-15-420-050-E

B. Installation of the PTU Manifold

CAUTION: USE A SECOND WRENCH TO APPLY COUNTERTORQUE TO THE UNION WHEN YOU DISCONNECT/CONNECT HYDRAULIC LINES ON UNIONS. IF YOU DO NOT USE THE SECOND WRENCH, THERE IS A RISK THAT YOU WILL LOOSEN OR TIGHTEN THE UNION TOO MUCH.

CAUTION: YOU MUST INSTALL HYDRAULIC TUBES WITH HYDRAULIC FLUID AS LUBRICANT.

(1) Remove the sealant from the mating surface of the manifold (7) and the aircraft structure with a SCRAPER - NON METALLIC.
(2) Clean the component interfaces and the adjacent area.
(3) Do an inspection of the component interfaces and the adjacent area.
(4) Examine the structure of the aircraft in the area of the manifold attachment for cracks, corrosion or other damage.
(5) Apply a layer of Polysulfide Sealant-Low Adhesion Brushable - (Material No.06AEA1) to the mating surface of the manifold (7).
(6) Put the manifold (7) in position on the aircraft and install the bolts (1) and the washers (2). Do not tighten the bolts (1).
(7) Remove the blanking plugs from the pipe end-fittings and the unions on the manifold (7).
(8) Make sure that the hydraulic line end-fittings are serviceable.
(9) Apply Phosphate Ester Hydraulic Fluid-General Power - - (Material No.02ABA1) to the threads of the line end-fittings.
(10) Connect the pipe (11) to the union (13).
(11) TORQUE the pipe end-fitting (12) to between 10.7 and 9.7 m.daN (78.91 and 71.53 lbf.ft )

.
(12) Connect the pipe (21) to the check valve 3093GM.
(13) TORQUE the pipe end-fitting (22) to between 14.2 and 12.9 m.daN (104.72 and 95.13 lbf.ft )

.
(14) Connect the pipe (48) to the union (50).
(15) TORQUE the pipe end-fitting (49) to between 1.7 and 1.5 m.daN (12.54 and 11.06 lbf.ft )

.
(16) Connect the pipe (3) to the reducer (5).
(17) TORQUE the pipe end-fitting (4) to between 5.9 and 5.4 m.daN (43.51 and 39.82 lbf.ft )

.
(18) Tighten the bolts (1).

(19) If the heads of the bolts (1) have bores:

Safety the bolts (1) and the coupling half (46) with the lockwire 14QFB1Wire-Locking Dia: 0.8 mm CRES Nickel Alloy -.
Wire Locking of the Coupling and the Attachment Bolts

(20) Make sure that the isolation coupling (45) engages correctly in the coupling half (46).
(21) Remove the blanking caps from the electrical connectors.
(22) Make sure that all the electrical connections are clean and in the correct condition.
(23) Connect the electrical connector (29) to the PTU solenoid valve.

Subtask 29-13-15-865-052-A

C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):

PANEL	DESIGNATION	FIN	LOCATION
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N30
** ON A/C NOT FOR ALL
121VU	HYDRAULIC/HYD POWER/Y	3803GX	N31
** ON A/C ALL
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 29-13-15-860-054-A

D. Preparation for the Test
(1) Connect the isolation coupling of the PTU (Ref. AMM TASK 29-23-00-860-002).
(2) Pressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-002).

Subtask 29-13-15-710-050-A

E. Test
(1) Do the operational test of the PTU (Ref. AMM TASK 29-23-00-710-002).
(2) During the operational test, examine the connections of the manifold (7) and make sure that there are no leaks.

5. Close-up
Subtask 29-13-15-860-055-A

A. Put the aircraft back to the serviceable condition.
(1) Remove the container from below the PTU manifold.
(2) Remove the access platform(s).
(3) Remove the WARNING NOTICE(S).
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Close the main gear doors (Ref. AMM TASK 32-12-00-410-001).

[Rev.10 from 2021] 2026.04.01 00:19:56 UTC