Removal of the Lubrication and Scavenge Oil Pump [PW11]

TASK 79-21-01-000-801-A
Removal of the Lubrication and Scavenge Oil Pump

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.

WARNING: IF POSSIBLE, KEEP FUEL AND OIL AWAY FROM YOUR SKIN. USE PROTECTIVE CLOTHES. FUEL AND OIL CAN DRY YOUR SKIN AND CAUSE SKIN IRRITATION.

CAUTION: DO NOT LET FUEL OR OIL FALL ON THE ENGINE. YOU MUST IMMEDIATELY REMOVE UNWANTED FUEL OR OIL WITH A CLOTH. THE FUEL OR OIL CAN CAUSE DAMAGE TO SOME ENGINE PARTS.

ZONE: 400
FIN: 6004EM ** ON A/C NOT FOR ALL

1. Reason for the Job
Use this procedure to remove the lubrication and scavenge oil pump.
For more information about the lubrication and scavenge oil pump, refer to 79-20-00 DISTRIBUTION - DESCRIPTION AND OPERATION.
2. Job Set-up Information
A. Fixtures, Tools, Test and Support Equipment

REFERENCE	QTY	DESIGNATION
No specific	1	ACCESS PLATFORM 1M(3 FT)
No specific	1	CONTAINER 20L (5 USGAL)
No specific	AR	COVER - PROTECTION
No specific	1	PLIERS - JAWED, SOFT
PWA106340	1	JACK, HYDRAULIC - VFG, EDP, FUEL PUMP, STARTER
PWA211314	1	ADAPTER, INSTALLATION
PWA80611	1	JACK-HYDRAULIC

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, 451AL, 452AR
FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
447AL, 448AR, 461AL, 462AR

C. Referenced Information

REFERENCE	DESIGNATION
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 71-71-49-000-801-A	Removal of the Engine Drain Tubes and Pylon Drain Hoses
TASK 78-30-00-040-805-A	Deactivation of the Thrust Reverser System for Ground Maintenance
TASK 78-36-00-010-802-A	Opening of the Thrust Reverser Cowl-Doors
TASK 79-00-00-680-801-A	Drain the Engine Oil
TASK 79-21-01-400-801-A	Installation of the Lubrication and Scavenge Oil Pump
TASK 79-22-01-000-801-A	Removal and Inspection of the Magnetic Chip Collector Assemblies
TASK 79-33-23-000-801-A	Removal of the Oil Filter Differential Pressure Sensor
Removal of the Lubrication and Scavenge Oil Pump
Removal of the Lubrication and Scavenge Oil Pump (adapter)

3. Job Set-up
Subtask 79-21-01-941-050-A ** ON A/C NOT FOR ALL

A. Safety Precautions
(1) Do 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 79-21-01-010-050-A ** ON A/C NOT FOR ALL

B. Get Access
(1) Open the fan cowl doors (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
(2) Put an ACCESS PLATFORM 1M(3 FT) in position.

Subtask 79-21-01-040-050-A ** ON A/C NOT FOR ALL

C. Deactivation of the Thrust Reverser for Ground 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) Do the deactivation of the thrust reverser system for ground maintenance (Ref. AMM TASK 78-30-00-040-805).

Subtask 79-21-01-010-052-A ** ON A/C NOT FOR ALL

D. Get Access
(1) Open the thrust reverser cowl-doors (Ref. AMM TASK 78-36-00-010-802):
(a) FOR [4020KM1] (POWER PLANT-DEMOUNTABLE, ENG 1)
451AL 452AR
(b) FOR [4020KM2] (POWER PLANT-DEMOUNTABLE, ENG 2)
461AL 462AR

4. Procedure

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

Subtask 79-21-01-020-050-A ** ON A/C NOT FOR ALL

A. Removal of the Lubrication and Scavenge Oil Pump
(1) Find the lubrication and the scavenge oil pump (1) attached to the front of the Main Gearbox (MGB) at the eight o'clock position. See sheet 1 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

(2) Put the CONTAINER 20L (5 USGAL) under the oil pump (1).
(3) Drain the oil (Ref. AMM TASK 79-00-00-680-801).
(4) Remove and disconnect the wiring harnesses as follows: See sheets 1 and 2 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

(a) Use the PLIERS - JAWED, SOFT to disconnect the wiring harness (WC10) connector (P35) from the oil pump (1) receptacle (J35).
(b) Remove the wiring harnesses (W03) and (W04) from the bracket (13) spring clips.
(5) Remove the tube (LR21) (11) as follows: See sheet 2 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

(a) Remove the three bolts (12) that connect the tube (LR21) (11) to the oil pump (1).
(b) Remove the bracket (13) from the tube (LR21) (11).
(c) Remove the three bolts (15) that connect the tube (LR21) (11) to the oil scavenge tube (LR20).
(d) Remove the two face seals (14).
(6) Remove the 2.5 drain bleed tube (DR65) (Ref. AMM TASK 71-71-49-000-801).
(7) Remove the tube (LR01) (29) as follows: See sheet 3 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

(a) Remove the three bolts (12) that connect the tube (LR01) (29) to the oil pump (1).
1 Remove the bracket (28) from the tube (LR01) (29).
2 Disconnect the W03 harness from the bracket (28).
(b) Remove the three nuts (25) from the three bolts (27) that connect the tube (29) (LR01) to the tube (LR02).
(c) Remove the tube (LR01) (29).
(d) Remove the two face seals (26).
(8) Remove the tubes (LB01) (44) and (LP03) (48) as follows: See sheet 4 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

(a) Remove the two bolts (43) that connect the tube (LB01) (44) to the MGB.
(b) Remove the three bolts (27) and the nut (46) that connect the tube (LB01) (44) to the tube (LB02) and the bracket (47).
(c) Remove the bolt (42) that connects the tube (LB01) (44) to the oil pump (1).
(d) Remove the three bolts (40) that connect the bracket (39) and tube (LP03) (48) to the oil pump (1).
(e) Remove the three bolts (27) and the nut (46) that connect the tube (LP03) (48) to the tube (LP02) and the bracket (47).
(f) Remove the bracket (39).
(g) Remove the bracket (47).
(h) Remove the tube (LB01) (44).
(i) Remove the face seals (45) and (41).
(j) Remove the tube (LP03) (48).
(k) Remove the two face seals (26).
(9) Remove the tube (LR35) (59) as follows: See sheet 5 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

(a) Remove the three bolts (12) that connect the tube (LR35) (59) to the oil pump (1).
(b) Remove the two bolts (60) that connect the bracket (61) and the tube (LR35) (59) to the Angle Gearbox (AGB).
(c) Remove the bracket (61).
(d) Remove the tube (LR35) (59).
(e) Remove the face seals (58) and (62).
(10) Disconnect the tube (LR30) (73) from the oil pump (1) as follows: See sheet 6 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

(a) Remove the three bolts (12) that connect the bracket (74) and the tube (LR30) (73) to the oil pump (1).
(b) Remove the bracket (74).
(c) Remove the face seal (72).

PRE SB C72-00-0077A (Config-1 Initial Design Configuration)

(11) Remove the oil pump (1) as follows:
(a) Install the detail base to the PWA106340 JACK, HYDRAULIC - VFG, EDP, FUEL PUMP, STARTER with the three detail cap screws.

Removal of the Lubrication and Scavenge Oil Pump (adapter) ** ON A/C NOT FOR ALL

NOTE: It is permitted to use the PWA80611 JACK-HYDRAULIC if the PWA106340 JACK, HYDRAULIC - VFG, EDP, FUEL PUMP, STARTER is not available.

(b) Attach the PWA211314 ADAPTER, INSTALLATION to the base with the four captive screws.

CAUTION: BEFORE YOU REMOVE OR INSTALL THE OIL PUMP, MAKE SURE THAT THE TUBE (LR30) IS PROTECTED WITH PADS OR CLOTH. IF THE TUBE IS NOT PROTECTED, DAMAGE TO IT CAN OCCUR.

CAUTION: HOLD THE WEIGHT OF THE OIL PUMP DURING THE INSTALLATION. DO NOT LET THE OIL PUMP HANG ON THE DOWEL PINS OR ON THE DRIVE SHAFT WITHOUT THE BOLTS ENGAGED. IF YOU DO, THE OIL PUMP CAN DISENGAGE THE GEARBOX AND DROP. THE OIL PUMP WEIGHT IS 66 LBS (30 KGS). IF YOU DO NOT OBEY THIS CAUTION, DAMAGE TO THE OIL PUMP AND ENGINE CAN OCCUR.

(c) Adjust the adapter handle, the hand knob and the two lift hand wheels to align the PWA211314 ADAPTER, INSTALLATION with the oil pump (1). See sheet 7 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

Removal of the Lubrication and Scavenge Oil Pump (adapter) ** ON A/C NOT FOR ALL

(d) Attach the three adapter captive screws to the oil pump (1). See sheet 7 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

(e) Remove the four bolts (89) and the four washers (88) from the oil pump (1).
(f) Loosen the four captive bolts on the oil pump (1).

CAUTION: BE CAREFUL WHEN REMOVING THE OIL PUMP. MAKE SURE THERE IS NO INTERFERENCE WITH THE OIL PUMP DRIVESHAFT WITH ANY OF THE OTHER PARTS. THE OIL PUMP WEIGHT IS 66 LBS (30 KGS). IF YOU DO NOT OBEY THIS CAUTION, DAMAGE TO THE OIL PUMP AND ENGINE CAN OCCUR.

(g) Remove the oil pump (1) from the MGB.
(h) Remove the seal plate (87).

NOTE: The seal plate (87) can be used again later (Ref. AMM TASK 79-21-01-400-801).

END OF PRE SB C72-00-0077A (Config-1 Initial Design Configuration)

POST SB 72-00-0077A (Config-2 Improved Oil Pump Configuration)

(12) Remove the oil pump (1) as follows:
(a) Install the detail base to the PWA106340 JACK, HYDRAULIC - VFG, EDP, FUEL PUMP, STARTER with the three detail cap screws.

Removal of the Lubrication and Scavenge Oil Pump (adapter) ** ON A/C NOT FOR ALL

NOTE: It is permitted to use the PWA80611 JACK-HYDRAULIC if the PWA106340 JACK, HYDRAULIC - VFG, EDP, FUEL PUMP, STARTER is not available.

(b) Attach the PWA211314 ADAPTER, INSTALLATION to the base with the four captive screws.

CAUTION: BEFORE YOU REMOVE OR INSTALL THE OIL PUMP, MAKE SURE THAT THE TUBE (LR30) IS PROTECTED WITH PADS OR CLOTH. IF THE TUBE IS NOT PROTECTED, DAMAGE TO IT CAN OCCUR.

(c) Adjust the adapter handle, the hand knob and the two lift hand wheels to align the PWA211314 ADAPTER, INSTALLATION with the oil pump (1). See sheet 8 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

Removal of the Lubrication and Scavenge Oil Pump (adapter) ** ON A/C NOT FOR ALL

(d) Attach the three adapter captive screws to the oil pump (1). See sheet 8 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

(e) Remove the four bolts (89) and the four washers (88) from the oil pump (1).
(f) Loosen the four captive bolts on the oil pump (1).
(g) Disengagement of the oil pump:

(h) Remove the oil pump (1) from the MGB.
(i) Remove the seal plate (87).

NOTE: The seal plate (87) can be used again later (Ref. AMM TASK 79-21-01-400-801).

(j) Remove the strainer (90) from the oil pump (1).
(k) Remove and discard the packing (91) from the strainer (90).

END OF POST SB C72-00-0077A (Config-2 Improved Oil Pump Configuration)

(13) Remove the tube (LR30) (73) as follows. See sheet 6 of the figure:

Removal of the Lubrication and Scavenge Oil Pump ** ON A/C NOT FOR ALL

(a) Remove the bolt (12) and the two bolts (77) that attach the bracket (76) and the tube (LR30) (73) to the AGB.
(b) Remove the bracket (76).
(c) Remove the tube (LR30) (73).
(d) Remove the strainer element (75).
(14) If necessary, remove the chip collector assemblies and the oil filter differential pressure sensor as follows:
(a) Remove the magnetic chip collector assemblies (Ref. AMM TASK 79-22-01-000-801).
(b) Remove the oil filter differential pressure sensor (Ref. AMM TASK 79-33-23-000-801).

CAUTION: INSTALL PROTECTION COVERS ON ALL THE OPENINGS IMMEDIATELY TO PREVENT DAMAGE TO THE ENGINE.

(15) Make sure that you install all the necessary COVER - PROTECTION to prevent damage to the engine.

[Rev.10 from 2021] 2026.04.01 03:41:31 UTC