Installation of the Hydraulic Suction Hose/Tube Assembly

TASK 29-13-49-400-001-A
Installation of the Hydraulic Suction Hose/Tube Assembly

WARNING: OBEY THE HYDRAULIC SAFETY PROCEDURES.

WARNING: DO NOT TOUCH THE HYDRAULIC SYSTEM COMPONENTS FOR A SHORT TIME AFTER THE ENGINE IS SHUTDOWN. THE ENGINE COMPONENTS STAY HOT FOR SOME TIME AND CAN CAUSE INJURY.

CAUTION: DO NOT LET HYDRAULIC FLUID FALL ON THE ENGINE. UNWANTED HYDRAULIC FLUID MUST BE REMOVED IMMEDIATELY WITH A CLEAN LINT FREE CLOTH. THE FLUID CAN CAUSE DAMAGE TO THE SURFACE PROTECTION AND TO SOME PARTS.

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

REFERENCE	QTY	DESIGNATION
No specific	AR	ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE
No specific	AR	CONTAINER 5 L (1.32 USGAL)
No specific	AR	WARNING NOTICE(S)
No specific	1	WRENCH - TORQUE
No specific	Torque wrench: range to between 75 and 66.7 lbf.ft (10.17 and 9.04 m.daN )
No specific	Torque wrench: range to between 75.3 and 66.7 lbf.ft (10.21 and 9.04 m.daN )
No specific	Torque wrench: range to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )
No specific	Torque wrench: range to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
195BB
FOR [1000EM2] (ENGINE-2)
447AL

C. Referenced Information

REFERENCE	DESIGNATION
TASK 12-12-29-611-001-A	Fill the Hydraulic Fluid Reservoir with a Hand Pump
TASK 12-12-29-611-002-A	Fill the Hydraulic Fluid Reservoir with a Hydraulic Service Cart
TASK 29-10-00-864-002-A	Depressurize the Yellow Hydraulic System
TASK 29-13-00-710-002-A	Operational Test of the Yellow Hydraulic System
TASK 29-13-51-860-001-A	Hydraulic Maintenance Procedure after an Engine Installation (with Engine Pump Installed) or after an Engine Pump Installation
TASK 29-14-00-614-001-A	Depressurization of the Hydraulic Reservoirs
TASK 71-13-00-410-040-B	Closing of the Fan Cowl Doors
Hydraulic Suction Hose/Tube Assembly
Hydraulic Suction Hose/Tube Assembly

3. Job Set-up
Subtask 29-13-49-860-060-A ** ON A/C NOT FOR ALL

A. Aircraft Maintenance Configuration
(1) Make sure that the Yellow hydraulic system is depressurized and put it in the maintenance configuration.
(Ref. AMM TASK 29-10-00-864-002)
(2) Make sure that the Yellow hydraulic reservoir is depressurized (Ref. AMM TASK 29-14-00-614-001).
(3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:

on the ground service panel 198CB.

(4) Make sure that the WARNING NOTICE(S) is (are) in position on the access door 195BB to tell persons not to pressurize the Yellow hydraulic reservoir.
(5) Make sure that the ACCESS PLATFORM 2M (6 FT) - ADJUSTABLE is in position at the engine 1(2).
(6) Make sure that the fan-cowl door 447AL is open.

Subtask 29-13-49-941-064-A ** ON A/C NOT FOR ALL

B. Safety Precautions
(1) On the center pedestal, on the ENG panel 115VU:

make sure that WARNING NOTICE(S) is (are) in position to tell persons not to start the engine.

(2) Make sure that the engine 1(2) shutdown occurred not less than 5 minutes before you do this procedure.
(3) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to pressurize the Yellow hydraulic system:

in the cockpit, on the HYD section of the overhead panel 40VU.

(4) On the overhead maintenance panel 50VU:

make sure that the ON legend of the ENG/FADEC GND PWR/1(2) pushbutton switch is off.

(5) Make sure that the WARNING NOTICE(S) is (are) in position to tell persons not to energize the FADEC 1(2).
(6) Make sure that a CONTAINER 5 L (1.32 USGAL) is below the suction-hose adapter connection to the hydraulic pump.

Subtask 29-13-49-865-052-A ** ON A/C NOT FOR ALL

C. 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/Y HYD/PUMP ENG2/MONG	3700GD	Q37

4. Procedure
Subtask 29-13-49-420-054-A ** ON A/C NOT FOR ALL

A. Installation of the Hydraulic Suction Hose/Tube Assembly
(1) Remove the protective covers from the ends of the suction hose/tube (25), the fluid disconnect panel and the union in the hydraulic pump.
(2) Connect the coupling half (15) to the suction hose/tube (25).
(3) TORQUE the coupling nut on the suction hose/tube (25) to between 75 and 66.7 lbf.ft (10.17 and 9.04 m.daN )

.
(4) Connect the adapter assembly (60) to the suction hose/tube (25).
(5) TORQUE the coupling nut on the suction hose/tube (25) to between 75 and 66.7 lbf.ft (10.17 and 9.04 m.daN )

.
(6) Connect the coupling half (15) on the suction hose/tube (25) to the fluid disconnect panel. Tighten the coupling half (15) with your hand.
(7) Attach the suction hose/tube (25) to the top bracket with the clamp (20), bolt (5) and washer (10). Do not TORQUE the bolt at this time.
(8) Attach the suction hose/tube (25) to the two channels with the clamps (35), bolts (30), washers (10) and (12) and nut (14). Do not TORQUE the bolts at this time.
(9) Attach the suction hose/tube (25) to the bottom bracket with the clamp (35), bolt (30) and washer (10). Do not TORQUE the bolt at this time.
(10) Put the center line of the clamp at a distance of 1.73 in. (43.94 mm) above the flange of the suction hose/tube.
(11) Install the center mount clamp (55) as follows:
(a) Remove the bolt (40), washer (45) and nut (50) from the band on the center mount clamp (55).
(b) Open the band on the center mount clamp (55) and put the suction hose/tube (25) into its hole in the insert.
(c) Put the band on the insert and install the bolt (40), washer (45) and nut (50).
(d) Make sure that the center mount clamp (55) is installed at a distance of 12.30 in. (312.42 mm) below the flange of the suction hose/tube.
(e) Make sure that the center mount clamp (55) and hoses have a minimum clearance of 0.40 in. (10.16 mm) from the CFMI hose.
(f) TORQUE the nut (50) to between 90 and 75 lbf.in (1.02 and 0.85 m.daN )

.
(12) Make sure that the suction hose/tube (25) is in the correct position on the engine.
(13) Connect the adapter assembly (60) on the suction hose/tube (25) to the union in the hydraulic pump.

NOTE: You can use a second WRENCH - TORQUE to hold the union on the hydraulic pump when you TORQUE the adapter assembly.

(14) TORQUE the adapter assembly (60) to between 75.3 and 66.7 lbf.ft (10.21 and 9.04 m.daN )

CAUTION: YOU MUST TORQUE THE BOLTS IN THE SEQUENCE GIVEN. IF YOU DO NOT TORQUE THE BOLTS IN SEQUENCE, YOU CAN CAUSE DAMAGE TO THE SUCTION HOSE/TUBE ASSEMBLY.

(15) TORQUE the bolt (30) on the top mid-channel to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in )

.
(16) TORQUE the bolts (30) on the bottom bracket to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in )

.
(17) TORQUE the bolt (30) on the bottom mid-channel to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in )

.
(18) TORQUE the bolt (5) on the top bracket to between 0.39 and 0.34 m.daN (34.51 and 30.09 lbf.in )

.
(19) Remove the container.

Subtask 29-13-49-865-050-A ** ON A/C NOT FOR ALL

B. 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/Y HYD/PUMP ENG2/MONG	3700GD	Q37

Subtask 29-13-49-710-058-A ** ON A/C NOT FOR ALL

C. Operational Test
(1) Do an operational test of the Yellow hydraulic system (Ref. AMM TASK 29-13-00-710-002).
(2) During the dry motoring of the engine 2, make sure that there are no leaks from the suction hose/tube.
(3) Make sure that the level of the hydraulic fluid in the Yellow reservoir is correct. If necessary, fill the reservoir (Ref. AMM TASK 12-12-29-611-001) or (Ref. AMM TASK 12-12-29-611-002).

Subtask 29-13-49-860-115-A ** ON A/C NOT FOR ALL

D. Do the hydraulic maintenance procedure (Ref. AMM TASK 29-13-51-860-001).

5. Close-up
Subtask 29-13-49-410-062-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Remove the container.
(2) Remove the WARNING NOTICE(S).
(3) Remove the access platform(s).
(4) Make sure that the work area is clean and clear of tools and other items.
(5) Close the left fan-cowl door (Ref. AMM TASK 71-13-00-410-040).
(a) FOR [1000EM2] (ENGINE-2)
close the door 447AL.
(6) Close the door 195BB.

[Rev.10 from 2021] 2026.04.01 00:22:25 UTC