Installation of the Fuel Flow Divider [PW11]

TASK 73-11-03-400-801-A
Installation of the Fuel Flow Divider

WARNING: BE CAREFUL WHEN YOU DO WORK ON THE ENGINE AFTER SHUTDOWN. THE ENGINE CAN STAY HOT FOR A LONG TIME. IF YOU DO NOT OBEY THIS INSTRUCTION, INJURY CAN OCCUR.

ZONE: 400
FIN: 4090KS ** ON A/C NOT FOR ALL

1. Reason for the Job
Use this procedure to install the fuel flow divider.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	PLIERS - JAWED, SOFT
No specific	Torque wrench: range to between 18 and 15 lbf.in (0.20 and 0.17 m.daN )
No specific	Torque wrench: range to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )
No specific	Torque wrench: range to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )
No specific	Torque wrench: range to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )
No specific	Torque wrench: range to between 525 and 475 lbf.in (5.93 and 5.37 m.daN )
No specific	Torque wrench: range to between 750 and 675 lbf.in (8.48 and 7.63 m.daN )

B. Work Zones and Access Panels

ZONE/ACCESS	ZONE DESCRIPTION
400	POWER PLANT, NACELLES AND PYLONS
FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
TASK 71-00-00-720-811-A	Test No. 3A - Idle Power Test
TASK 71-00-00-860-832-A	Procedure to Prevent Engine Motoring and to Stop the Electrical Supply to the EEC
TASK 71-13-00-010-802-A	Opening of the Fan Cowl Doors
TASK 71-13-00-410-802-A	Closing of the Fan Cowl Doors
TASK 73-11-03-000-801-A	Removal of the Fuel Flow Divider
TASK 73-25-34-400-802-A	Installation of the Engine Interface Unit (EIU)
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-30-00-440-805-A	Reactivation of the Thrust Reverser System after Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 78-36-00-410-802-A	Closing of the Thrust Reverser Cowl-Doors
Installation of the Fuel Flow Divider

3. Job Set-up
Subtask 73-11-03-941-051-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Make sure that you did the procedure to prevent engine motoring and to stop the electrical supply to the Electronic Engine Control (EEC)
(Ref. AMM TASK 71-00-00-860-832).

Subtask 73-11-03-010-052-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Make sure that the fan cowl doors are open (Ref. AMM TASK 71-13-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL, 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR

Subtask 73-11-03-040-051-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser System for Maintenance

WARNING: YOU MUST DEACTIVATE THE THRUST REVERSER BEFORE YOU DO WORK ON OR AROUND IT. IF YOU DO NOT, THE THRUST REVERSER CAN OPERATE ACCIDENTALLY AND CAUSE AN INJURY AND/OR DAMAGE.

(1) Make sure that you did the deactivation of the thrust reverser system for maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 73-11-03-010-053-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Make sure that the right thrust reverser cowl-doors are open (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR

4. Procedure
Subtask 73-11-03-420-050-A ** ON A/C NOT FOR ALL

A. Installation of the Fuel Flow Divider

CAUTION: WIPE CLEAN ALL PARTS AND TOOLS AS NECESSARY TO REMOVE UNWANTED DEBRIS AND PREVENT DAMAGE TO THE ENGINE.

(1) Removal of protection covers

CAUTION: REMOVE THE PROTECTION COVERS FROM THE OPENINGS AS NECESSARY TO PREVENT ENGINE DAMAGE.

(a) Make sure that you remove all the necessary COVER - PROTECTION to prevent damage to the engine.
(2) Make sure that the drain plug on the fuel manifold is installed (Ref. AMM TASK 73-11-03-000-801).
(3) Install the fuel flow divider (1) on the High Pressure Turbine (HPT) case as follows:
(a) Install the divider (1) on the three brackets with the three captive bolts.
(b) TORQUE the three captive bolts to between 70 and 60 lbf.in (0.79 and 0.68 m.daN )

.
(c) Connect the fuel supply manifold (FM02) to the divider (1) fingertight.
(d) Connect the two fuel supply manifolds (FS01) to the divider (1) fingertight.
(e) Connect the tube (FD01) to the divider (1) fingertight.
(4) Torquing of the manifolds and tubes

CAUTION: USE A SECOND WRENCH TO HOLD THE MATING PARTS WHEN YOU LOOSEN OR TIGHTEN THE TUBE OR HOSE NUTS. IF YOU DO NOT OBEY THIS CAUTION, YOU CAN TWIST OR CAUSE DAMAGE TO THE TUBES OR HOSES.

(a) Torque the manifold (FM02) as follows:
1 TORQUE the B-nut to between 750 and 675 lbf.in (8.48 and 7.63 m.daN )

.
2 Loosen the B-nut to zero.
3 TORQUE the B-nut again to between 750 and 675 lbf.in (8.48 and 7.63 m.daN )

NOTE: Do not loosen the B-nut.

4 TORQUE the B-nut to between 750 and 675 lbf.in (8.48 and 7.63 m.daN )

.
(b) Torque the small manifold (FS01) as follows:
1 TORQUE the B-nut to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
2 Loosen the B-nut to zero.
3 TORQUE the B-nut again to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

NOTE: Do not loosen the B-nut.

4 TORQUE the B-nut again to between 225 and 200 lbf.in (2.54 and 2.26 m.daN )

.
(c) Torque the large manifold (FS01) as follows:
1 TORQUE the B-nut to between 525 and 475 lbf.in (5.93 and 5.37 m.daN )

.
2 Loosen the B-nut to zero.
3 TORQUE the B-nut again to between 525 and 475 lbf.in (5.93 and 5.37 m.daN )

NOTE: Do not loosen the B-nut.

4 TORQUE the B-nut again to between 525 and 475 lbf.in (5.93 and 5.37 m.daN )

.
(d) Torque the tube (FD01) as follows:
1 TORQUE the B-nut to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

.
2 Loosen the B-nut to zero.
3 TORQUE the B-nut again to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

NOTE: Do not loosen the B-nut.

4 TORQUE the B-nut again to between 375 and 340 lbf.in (4.24 and 3.84 m.daN )

.
(e) Connect the hose with the clamp (4) to the fuel flow divider (1).

CAUTION: DO NOT TIGHTEN THE HOSE CLAMPS TOO MUCH. IF YOU TIGHTEN THEM TOO MUCH, YOU CAN CAUSE DAMAGE TO THE HOSE CLAMPS OR THE INSULATION COVERS.

1 TORQUE the clamp (4) until tight and not more than 18 lbf.in (0.20 m.daN).
(5) Connect the wiring harness (WC08) connector (P46) to the divider receptacle (J46) as follows:
(a) Examine, align and engage the connector.
(b) Push lightly inward on the connector while you tighten the coupling ring.
(c) Use PLIERS - JAWED, SOFT to tighten the connector against the receptacle.
(d) While you tighten, push the connector in from side to side.
(e) Make sure that you can feel the ratchet feature.
(f) Tighten the connector until the PLIERS - JAWED, SOFT slip on the connector ring.
(6) Install the heat shield (2) to the manifold (FM02) with the clamp (3).
(7) TORQUE the clamp (3) to between 18 and 15 lbf.in (0.20 and 0.17 m.daN )

.
(8) Examine the assembly for foreign objects, damage and correct assembly.

5. Close-up
Subtask 73-11-03-410-050-A ** ON A/C NOT FOR ALL

A. Close Access
(1) Make sure that the work area is clean and clear of tools and other items.
(2) Close the right thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
462AR

Subtask 73-11-03-440-050-A ** ON A/C NOT FOR ALL

B. Do the reactivation of the thrust reverser system after maintenance (Ref. AMM TASK 78-30-00-440-805).

Subtask 73-11-03-410-051-A ** ON A/C NOT FOR ALL

C. Close Access
(1) Close the fan cowl doors (Ref. AMM TASK 71-13-00-410-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
437AL 438AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL 448AR
(2) Remove the WARNING NOTICE(S).
(3) Make sure that all the circuit breakers shown in the paragraph Procedure of the engine interface unit installation are closed. If they are not, close them in the recommended sequence
(Ref. AMM TASK 73-25-34-400-802)

Subtask 73-11-03-710-050-A ** ON A/C NOT FOR ALL

D. Do this test:
(1) Do the test No. 3 - Idle power test (Ref. AMM TASK 71-00-00-720-811).

[Rev.10 from 2021] 2026.04.01 12:57:09 UTC