Removal of the Hand Pump

TASK 52-36-11-000-001-A
Removal of the Hand Pump

WARNING: MAKE SURE THAT THE TRAVEL RANGES OF THE FLIGHT CONTROLS SURFACES ARE CLEAR. MOVEMENT OF FLIGHT CONTROLS CAN CAUSE INJURY TO PERSONS AND/OR DAMAGE TO EQUIPMENT.

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: 3009GM

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 2M (6 FT) - ADJUSTABLE
No specific	1	CONTAINER 5 L (1.32 USGAL)
No specific	AR	PLUG - BLANKING
No specific	AR	SAFETY CLIP - CIRCUIT BREAKER
No specific	1	WARNING NOTICE(S)

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
198CB, 198DB

C. Referenced Information

REFERENCE	DESIGNATION
TASK 29-00-00-910-002-A	Safety Procedures of the Hydraulic System
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 29-23-00-860-001-A	Disconnection of the Isolation Coupling of the Power Transfer Unit (PTU)
Hand Pump 3009GM

3. Job Set-up
Subtask 52-36-11-010-050-A

A. Get Access
(1) Put the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE in positon below the Yellow ground service panel.
(2) Open the access doors 198CB and 198DB.

Subtask 52-36-11-865-050-A

B. Open, safety and tag 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
122VU	DOORS/CARGO	1MJ	T12
123VU	Y HYD/ELEC/PUMP	3802GX	AB06
123VU	Y HYD/ELEC/ELEC PUMP/NORM	3801GX	AB03

Subtask 52-36-11-860-051-A

C. Aircraft Maintenance Configuration
(1) Depressurize the Yellow hydraulic system (Ref. AMM TASK 29-10-00-864-002).
(2) Depressurize the reservoir of the Yellow hydraulic system (Ref. AMM TASK 29-14-00-614-001).
(3) Put WARNING NOTICE(S) 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.

(4) Obey the hydraulic safety procedures (Ref. AMM TASK 29-00-00-910-002).
(5) Disconnect the isolation coupling of the power transfer unit (Ref. AMM TASK 29-23-00-860-001) to prevent the possible pressurization of the Green hydraulic system.
(6) Put a CONTAINER 5 L (1.32 USGAL) below the hydraulic connections of the hand pump to collect hydraulic fluid.

4. Procedure
Subtask 52-36-11-020-050-A

A. Removal of the Handpump

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.

(1) Loosen the union nut (9) from the union (10) and disconnect carefully the suction line (8) from the handpump (16).
(2) Loosen the union nut (6) from the union (5) and disconnect carefully the pressure line (7) from the handpump (16).
(3) Put the PLUG-BLANKING in each disconnected line end.
(4) Remove the attachment angle (3) from the ground service panel (15) to avoid damage to the lockwire of the handpump (16):
(a) Remove the screws (1) and the washers (2) from the attachment angle (3).
(b) Remove the screws (19) and the washers (20) from the ground service panel (15).
(c) Remove the attachment angle (3) from the ground service panel (15).
(5) Remove the screws (12) and the washers (13) from the riveted angle (14).
(6) Carefully remove the handpump (16) through the cut out of the ground service panel (15).
(7) Disassemble the hand pump (16) as follows:
(a) Remove the plug (18) together with the O-ring (17) from the port B of the handpump (16)
(b) Remove and discard the O-ring (17) from the plug (18).
(c) Remove the union (10) together with the O-ring (11) from the port C of the handpump (16).
(d) Remove the union (5) together with the O-ring (4) from the port A of the handpump (16).
(e) Remove and discard the O-rings (4) and (11) from the unions (5) and (10).

[Rev.10 from 2021] 2026.04.02 06:28:10 UTC