DMC:V2500-A0-72-42-3000-00A-710A-B|Issue No:003|Issue Date:2017-05-01

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

All

Common Information

TASK 72-42-30-440-001 No. 4 Bearing Compartment Assembly - Assemble, Assembly-001

General

Fig/item numbers in parentheses in the procedure agree with those used in the IPC. Only the primary Fig/item numbers are used. For the service bulletin alpha variants refer to the IPC.

For all parts identified in a different Chapter/Section/Subject, the applicable Chapter/Section/Subject comes before the Fig/item number.

For standard torque data and procedures, refer to the SPM TASK 70-41-00-400-501 and SPM TASK 70-41-02-400-501.

Special torque data is identified by the symbol * after the torque value.

Special torque data and assembly tolerances are included in the procedure.

Lubricate all threads and abutment faces of nuts and bolts with CoMat 10-077 APPROVED ENGINE OILSs, unless other lubricants are referred to in the procedure.

To identify, lubricate and install seal rings, refer to the SPM TASK 70-44-01-400-501.

The number for each radial location must be identified in a clockwise direction. These start at the engine top position when you look from the rear of the engine, unless stated differently in the procedure.

NOTE

To identify the consumable materials refer to the PCI.

NOTE

Special tools are identified in the procedure by the tool primary number.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

Name	Manufacturer	Part Number / Identification	Quantity
IAE 1F10026 Hydraulic hand pump	0AM53	IAE 1F10026	1
IAE 6F10027 Heater control unit	0AM53	IAE 6F10027	1
IAE 6F10029 Air flow test cart	0AM53	IAE 6F10029	1
IAE 1P16389 Holding base	0AM53	IAE 1P16389	1
IAE 1P16041 Heater	0AM53	IAE 1P16041	1
IAE 1P16069 Wrench	0AM53	IAE 1P16069	1
IAE 1P16068 Support fixture	0AM53	IAE 1P16068	1
IAE 1P16469 Heater	0AM53	IAE 1P16469	1
IAE 1P16266 Air flow fixture	0AM53	IAE 1P16266	1
IAE 1P16390 Removal/installation drift	0AM53	IAE 1P16390	1
IAE 1P16104 Cover	0AM53	IAE 1P16104	1
IAE 1P16106 cover	0AM53	IAE 1P16106	1
IAE 1P16108 cover	0AM53	IAE 1P16108	1
IAE 1P16145 Crimp fixture	0AM53	IAE 1P16145	1
IAE 1P16469 Heater	0AM53	IAE 1P16469	1
IAE 1P17000 Protective cover	0AM53	IAE 1P17000	1

Consumables, Materials and Expendables

Name	Manufacturer	Part Number / Identification	Quantity	Remark
CoMat 10-077 APPROVED ENGINE OILS	LOCAL	CoMat 10-077
CoMat 02-141 LOCKWIRE	LOCAL	CoMat 02-141

Spares

Name	Manufacturer	Part Number / Identification	Quantity	Remark
Key washer			1
Key washer			1
Key washer			15
Gasket			1
Gasket			1
Key washer			1

Safety Requirements

NONE

Procedure

SUBTASK 72-42-30-220-051 Reference the Fits and Clearances of the No. 4 Bearing Front Compartment at Location 2052

Refer to Figure.

Reference the clearance/interference at location 2052. If required, use the data written as a note in TASK 72-42-33-200-001 (INSPECTION-001) and TASK 72-42-35-200-001 (INSPECTION-001).

Table 1. Fits and Clearances (all dimensions are in inches)
	NEW PART		WORN PART
	DIMENSIONS		DIMENSIONS
PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
LOCATION 2052
No. 4 Bearing Seal Assy No. 4 Bearing Front Face Seal Assembly (72-42-33, 01-010), Location Diameter
No. 4 Bearing Front Cooling Duct Assy ENGINE-NO.4 BEARING FRONT COOLING DUCT (72-42-35, 01-010), Location Diameter
Seal Assy Diameter	6.055	Clear
	6.051	0.002
Cooling Duct Assy Diameter	6.057	0.006
	6.053	Intf

Table 2. Fits and Clearances (all dimensions are in millimeters)
	NEW PART		WORN PART
	DIMENSIONS		DIMENSIONS
PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
LOCATION 2052
No. 4 Bearing Seal Assy No. 4 Bearing Front Face Seal Assembly (72-42-33, 01-010), Location Diameter
No. 4 Bearing Front Cooling Duct Assy ENGINE-NO.4 BEARING FRONT COOLING DUCT (72-42-35, 01-010), Location Diameter
Seal Assy Diameter	153.797	Clear
	153.696	0.051
Cooling Duct Assy Diameter	153.847	0.152
	153.747	Intf

SUBTASK 72-42-30-220-052 Reference the Fits and Clearances of the No. 4 Bearing Front Compartment at Location 2053

Refer to Figure.

Reference the interference at location 2053. If required, use the data written as a note in TASK 72-42-36-200-001 (INSPECTION-001) and TASK 72-42-35-200-001 (INSPECTION-001).

Table 3. Fits and Clearances (all dimensions are in inches)
	NEW PART		WORN PART
	DIMENSIONS		DIMENSIONS
PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
LOCATION 2053
No. 4 Bearing Heatshield Assy ENGINE-NO.4 BEARING FRONT HEATSHIELD (72-42-36, 01-010), Location Diameter
No. 4 Bearing Cooling Duct Assy ENGINE-NO.4 BEARING FRONT COOLING DUCT (72-42-35, 01-010), Location Diameter
Heatshield Location Diameter	5.963	Clear
	5.940	0.002
Cooling Duct Assy Location Diameter	5.975	0.035
	5.965	Clear

Table 4. Fits and Clearances (all dimensions are in millimeters)
	NEW PART		WORN PART
	DIMENSIONS		DIMENSIONS
PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
LOCATION 2053
No. 4 Bearing Heatshield Assy ENGINE-NO.4 BEARING FRONT HEATSHIELD (72-42-36, 01-010), Location Diameter
No. 4 Bearing Cooling Duct Assy ENGINE-NO.4 BEARING FRONT COOLING DUCT (72-42-35, 01-010), Location Diameter
Heatshield Location Diameter	151.46	Clear
	150.88	0.05
Cooling Duct Assy Location Diameter	151.76	0.88
	151.51	Clear

SUBTASK 72-42-30-220-053 Reference the Fits and Clearances of the No. 4 Bearing Front Compartment at Location 2054

Refer to Figure.

Reference the clearance/interference at location 2054. If required, use the data written as a note in TASK 72-42-36-200-001 (INSPECTION-001) and TASK 72-42-31-200-001 (INSPECTION-001).

Table 5. Fits and Clearances (all dimensions are in inches)
	NEW PART		WORN PART
	DIMENSIONS		DIMENSIONS
PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
LOCATION 2054
No. 4 Bearing Heatshield Assy ENGINE-NO.4 BEARING FRONT HEATSHIELD (72-42-36, 01-010), Location Diameter
No. 4 Bearing Support Assy ENGINE-NO.4 BEARING SUPPORT ASSEMBLY (72-42-31, 01-010), Location Diameter
Heatshield Assy Location Diameter	12.874	Clear
	12.860	0.016
Support Assy Location Diameter	12.876	0.008
	12.866	Intf

Table 6. Fits and Clearances (all dimensions are in millimeters)
	NEW PART		WORN PART
	DIMENSIONS		DIMENSIONS
PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
LOCATION 2054
No. 4 Bearing Heatshield Assy ENGINE-NO.4 BEARING FRONT HEATSHIELD (72-42-36, 01-010), Location Diameter
No. 4 Bearing Support Assy ENGINE-NO.4 BEARING SUPPORT ASSEMBLY (72-42-31, 01-010), Location Diameter
Heatshield Assy Location Diameter	327.00	Clear
	326.64	0.406
Support Assy Location Diameter	327.05	0.203
	326.80	Intf

SUBTASK 72-42-30-220-054 Reference the Fits and Clearances of the No. 4 Bearing Front Compartment at Location 2055

Refer to Figure.

Reference the interference at location 2055. If required, use the data written as a note in TASK 72-42-31-200-001 (INSPECTION-001) and TASK 72-42-35-200-001 (INSPECTION-001).

Table 7. Fits and Clearances (all dimensions are in inches)
	NEW PART		WORN PART
	DIMENSIONS		DIMENSIONS
PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
LOCATION 2055
No. 4 Bearing Support Assy ENGINE-NO.4 BEARING SUPPORT ASSEMBLY (72-42-31, 01-010), Location Diameter
No. 4 Bearing Front Cooling Duct Assy ENGINE-NO.4 BEARING FRONT COOLING DUCT (72-42-35, 01-010), Location Diameter
Support Assy Location Diameter	12.752	Intf	12.754	Intf
	12.748	0.002	12.748	0.000
Duct Assy Location Diameter	12.758	0.010	12.758	0.010
	12.754	Intf	12.754	Intf

Table 8. Fits and Clearances (all dimensions are in millimeters)
	NEW PART		WORN PART
	DIMENSIONS		DIMENSIONS
PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
LOCATION 2055
No. 4 Bearing Support Assy ENGINE-NO.4 BEARING SUPPORT ASSEMBLY (72-42-31, 01-010), Location Diameter
No. 4 Bearing Front Cooling Duct Assy ENGINE-NO.4 BEARING FRONT COOLING DUCT (72-42-35, 01-010), Location Diameter
Support Assy Location Diameter	323.900	Intf	323.952	Intf
	323.800	0.051	323.800	0.000
Duct Assy Location Diameter	324.053	0.254	324.053	0.254
	323.952	Intf	323.952	Intf

SUBTASK 72-42-30-220-056 Reference the Fits and Clearances of the No. 4 Bearing Front Compartment at Location 2057

Refer to Figure.

Reference the interference at location 2057. If required, use the data written as a note in TASK 72-42-33-200-001 (INSPECTION-001) and TASK 72-42-31-200-001 (INSPECTION-001).

Table 9. Fits and Clearances (all dimensions are in inches)
	NEW PART		WORN PART
	DIMENSIONS		DIMENSIONS
PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
LOCATION 2057
No. 4 Bearing Seal Assy No. 4 Bearing Front Face Seal Assembly (72-42-33, 01-010), Location Diameter
No. 4 Bearing Support Assy ENGINE-NO.4 BEARING SUPPORT ASSEMBLY (72-42-31, 01-010), Location Diameter
Seal Assy Location Diameter	10.892	Intf	10.892	Intf
	10.888	0.000	10.888	0.000
Support Assy Location Diameter	10.896	0.008	10.897	0.009
	10.892	Intf	10.892	Intf

Table 10. Fits and Clearances (all dimensions are in millimeters)
	NEW PART		WORN PART
	DIMENSIONS		DIMENSIONS
PART IDENT	Size	Clearance	Non-select	REJECT IF MORE THAN
LOCATION 2057
No. 4 Bearing Seal Assy No. 4 Bearing Front Face Seal Assembly (72-42-33, 01-010), Location Diameter
No. 4 Bearing Support Assy ENGINE-NO.4 BEARING SUPPORT ASSEMBLY (72-42-31, 01-010), Location Diameter
Seal Assy Location Diameter	276.656	Intf	276.656	Intf
	276.556	0.000	276.556	0.000
Support Assy Location Diameter	276.758	0.203	276.784	0.228
	276.656	Intf	276.656	Intf

1. Refer to Figure.
2. Put the No. 4 Bearing Support ENGINE-NO.4 BEARING SUPPORT ASSEMBLY (72-42-31, 01-010) in to the IAE 1P16389 Holding base 1 off.
3. Install the IAE 1P16469 Heater 1 off to the No. 4 Bearing Support. Attach the heater to the IAE 6F10027 Heater control unit 1 off and heat the support to 345 deg F to 355 deg F (173 deg C to 179 deg C).
4. Disconnect and remove the heater control and the heater from the bearing support.
  NOTE
  Make sure the X mark on the No. 4 Bearing Outer Race is at the 12 o'clock position of the No. 4 Bearing Support. The dowel pin on the support is at the six o'clock position.
5. Put the outer race ENGINE-NO.4 BEARING (72-43-13, 01-010) in position.
6. Install the IAE 1P16390 Removal/installation drift 1 off onto the front support with the three pads that locate in the three scallops of the front support and the bearing outer race.
7. With the drift and a standard arbor press, drift the outer race in to the front support.
1. Refer to Figure and Figure.
2. Rotate the No. 4 Bearing Support ENGINE-NO.4 BEARING SUPPORT ASSEMBLY (72-42-31, 01-010) 180 degrees and attach the No. 4 Bearing Support to the IAE 1P16068 Support fixture using the four work bolts.
  NOTE
  Make sure that the bearing support and outer race are at room temperature before installation of the nut lock and the key washer.
3. Install the No. 4 Bearing ENGINE-NO.4 BEARING LOCK AND NUT (72-42-32, 01-010) key washer 1 off to the support with the tabs on the key washer in the slots on the support.
4. Install the No. 4 Bearing Outer Race Retaining Nut ENGINE-NO.4 BEARING LOCK AND NUT (72-42-32, 01-020) to the No. 4 Bearing Support.
5. CAUTION
  WHEN USING THE IAE 1P16069 WRENCH THE ACTUAL TORQUE WRENCH READING WILL BE LESS THAN THAT GIVEN BELOW. REFER TO TASK 70-41-01-400-501.
  Put the IAE 1P16069 Wrench 1 off in place on the nut and, with a standard torque wrench, torque the nut to 1900 to 2100 lbfin (214.671 to 237.268 Nm). Loosen the nut to 0 lbfin (0 Nm) and then torque to 1900 lbfin to 2100 lbfin (214.671 Nm to 237.268 Nm) again. Remove the wrench from the nut.
  NOTE
  The fixture may be turned to obtain a positive location in the nut slot. The base of the fixture is slotted for visual verification of the locator in the nut slot.
6. Lift the IAE 1P16145 Crimp fixture 1 off with a hoist and position over the assembly. Look to see if the jaws are rotated away from the base stop. Look to see if the locator has been retracted. Lower the fixture to the No. 4 Bearing Support. Hold the fixture to the support with the three capscrews and washers. Tighten by hand only, Figure.
7. Attach the IAE 1F10026 Hydraulic hand pump 1 off to the fixture and actuate to crimp the key washer. Hydraulic pressure setting should be 3000 psi (20684.3 kPa) to crimp the key washer in eight places.
8. Disconnect the hydraulic pump.
9. Remove the crimp fixture from the No. 4 Bearing Support.
1. Refer to Figure and Figure.
2. Install (01-010) gasket 1 off in the groove of the No. 4 Bearing Nozzle Assembly.
3. Put the oil nozzle in place in the Front Seal Support Assembly.
4. CAUTION
  DO NOT LUBRICATE BOLT THREADS WITH OIL OR OTHER THREAD LUBRICANT. THE SUPPLIER GIVES BOLTS THAT ARE COATED.
  Install the two bolts (01-040 and 01-080), (01-020) key washer 1 off and (01-060) key washer 1 off to hold the oil nozzle.
  NOTE
  Bolts must operate freely when you install before the final torque procedure.
5. Torque the larger bolt (01-040) to 90 to 120 lbfin (10.169 to 13.558 Nm).
  NOTE
  Bolts must operate freely when you install before the final torque procedure.
6. Torque the smaller bolt (01-080) to 45 to 60 lbfin (5.084 to 6.779 Nm).
7. 1. You must use key washers one time only. Use a new key washer for each assembly.
  2. The bent keys must always be set against sufficiently close to the hole edge in the counterclockwise direction to prevent movement of the part to be locked.
  3. Minimum of one key must be bent with at least 75 percent of its width (that is, as measured at the bottom of the key) is engaged with the flat side of the part to be locked.
  4. The two bent keys must be bent to give maximum clearance of 0.010 in. (0.25 mm) and bent flat to the flat of the bolt. Bulging is not permitted.
1. Refer to Figure.
2. Install gasket (01-010) 1 off in the groove of the No.4 Bearing Nozzle Assembly.
3. Put the oil nozzle in place in the Front Seal Support Assembly.
4. CAUTION
  DO NOT LUBRICATE BOLT THREADS WITH OIL OR OTHER THREAD LUBRICANT. THE SUPPLIER GIVES BOLTS THAT ARE COATED.
  Install bolt (01-040) 2 off and flat washer (01-020) 2 off to hold the oil nozzle.
5. Torque both bolts to 125 lbfin. to 140 lbfin. (14.123 Nm to 15.818 Nm).
1. Refer to Figure.
2. Loosen the thumb screws that attach the bracket of the IAE 1P16266 Air flow fixture 1 off and slide the inlet and outlet tubes to make space for installation of the Front Seal Assembly and the pressure tube.
3. Remove the screws and the washers from the top ring and remove the ring.
4. Install the gasket in to the recess in the flanged end of the pressure tube.
5. Attach the pressure tube to the Front Seal Assembly with the three work bolts.
6. Install IAE 1P17000 Protective cover 1 off on the No. 4 Bearing face seal.
7. Install the front assembly and the pressure tube in to the air flow fixture. Take care not to hit the pressure tube on the fixture during installation.
8. Install the two packings on the end of the air pressure tube.
9. Install the top ring and safety the Front Seal Assembly in the fixture with the two screws and washers.
10. Put the assembly on the IAE 6F10029 Air flow test cart 1 off and connect the air supply to the pressure tube.
11. 1. Combined flow through both the nozzles must be 32 lb to 38 lb (14.51 kg to 17.24 kg) per hour.
12. Disconnect and remove the front seal and the pressure tube from the air flow cart.
13. Disconnect and remove the front seal and the pressure tube from the air flow fixture.
14. Remove the protective cover from the No. 4 Bearing face seal.
15. Remove the two packings from the oil pressure tube.
16. Remove the bolts that attach the pressure tube to the front seal.
17. Remove the gasket from the flanged end of the pressure tube.
1. Refer to Figure.
2. Install the seven spacers No. 4 Bearing Front Face Seal Assembly (72-42-33, 01-300) on the forward side of the flange.
3. Torque the spacers to 55 lbfin to 60 lbfin (5.084 Nm to 6.779 Nm).
1. Refer to Figure.
2. Remove the work bolts which hold the bearing support to the fixture.
3. Lift the bearing support above the IAE 1P16068 Support fixture 1 off and turn the bearing support so the rear flange is down.
4. Put the bearing support in the support fixture. Make sure to align the dowel pin with the offset hole in the support fixture.
5. Attach the bearing support to the support fixture with the four work bolts and washers.
1. Refer to Figure.
2. Install (01-100) gasket 1 off on the front side of the forward flange of the Support Assembly ENGINE-NO.4 BEARING SUPPORT ASSEMBLY (72-42-31, 01-010).
3. Heat the No. 4 Bearing Front Seal Assembly to 225 deg F - 250 deg F (107 deg C - 121 deg C).
4. Install the Seal Assembly No. 4 Bearing Front Face Seal Assembly (72-42-33, 01-010) on the support. Make sure the Seal Assembly offset hole aligns with the offset hole of the Support Assembly Inner Flange.
5. Install the work bolts from the rear to secure the Seal Assembly to the Bearing Support Flange.
1. Refer to Figure.
2. CAUTION
  DO NOT LUBRICATE THE SPACER THREADS ON THE NO. 4 BEARING FRONT COOLING DUCT WITH OIL OR OTHER THREAD LUBRICANTS. THESE SPACERS MUST HAVE ANTIGALLING COMPOUND PER TASK 72-42-35-200-001 BEFORE ASSEMBLY.
  Decrease the temperature of the Cooling Duct.
3. Install the Cooling Duct ENGINE-NO.4 BEARING FRONT COOLING DUCT (72-42-35, 01-010) to the bearing support and the Seal Assembly.
4. Let the temperature of the Cooling Duct increase to room temperature.
5. Install (01-160) key washers 7 off and nuts (01-180) to attach the Cooling Duct to the Seal Assembly.
6. Torque the nuts to 24 lbfin to 36 lbfin (2.712 Nm to 4.067 Nm). Bend the key washers to safety the nuts.
7. Install the four spacers (01-200) on the two sides of the scavenge tube mounting pad and the two sides of the pressure tube pad.
8. Torque the spacers to 62 * lbfin to 72 * lbfin (7.005 Nm to 8.135 Nm).
1. Refer to Figure.
2. Decrease the temperature of the heatshield.
3. Install the heatshield ENGINE-NO.4 BEARING FRONT HEATSHIELD (72-42-36, 01-010) over the Cooling Duct.
4. Let the temperature of the heatshield increase to room temperature.
5. CAUTION
  MAKE SURE YOU INSTALL THE NUTS WITH THE SHOULDERS AGAINST THE COOLING DUCT.
  NOTE
  Nut for spacers adjacent to the pressure and scavenge tube ports will be installed after the tubes are installed.
  Install (01-160) key washers 8 off and 8 nuts (01-180).
6. Torque the nuts to 24 lbfin to 36 lbfin (2.712 Nm to 4.067 Nm). Bend the key washers to safety the nuts.
1. Install the IAE 1P16108 cover 1 off in to the No. 4 Bearing Front Cooling Duct Opening.
2. Remove the work bolts that attach the No. 4 Bearing Front Compartment to the IAE 1P16068 Support fixture.
3. Turn the No. 4 Bearing Front Compartment so that the outer rear flange of the bearing support is up in the fixture.
4. CAUTION
  MAKE SURE YOU INSTALL THE NUTS WITH THE SHOULDERS AGAINST THE HEATSHIELD.
  Install the IAE 1P16104 Cover 1 off in to the No. 4 Bearing Front Support.
5. Install the IAE 1P16106 cover 1 off over the No. 4 Bearing Outer Race.
6. Remove the No. 4 Bearing Front Compartment from the fixture and put in to a container.

Install the No. 4 Bearing Outer Race

Install the No. 4 Bearing Outer Race Retaining Nut and the Nut Lock

Crimp the No. 4 Bearing Retaining Lock Nut

Install the No. 4 Bearing Oil Nozzle in the No. 4 Front Bearing Seal Assembly (Pre SB 72-0629)

Air Flow Check the No. 4 Bearing Front Seal and the No. 4 Bearing Pressure Tube

Assemble the No. 4 Bearing Front Compartment

No. 4 Bearing Front Compartment - Fits and Clearances

No. 4 Bearing Front Compartment - Anti-Rotation Key-Washer Tabs Bending and Installation Limits (Pre SB 72-0629)

Install the No.4 Bearing Oil Nozzle in the No.4 Front Bearing Seal Assembly (Post SB 72-0629)

Requirements After Job Completion

Follow-On Conditions

NONE

Manufacturer Code:	0AM53
Enterprise Name:	IAE INTERNATIONAL AERO ENGINES AG
BU Name:	NULL
Building:	SUITE 400
Street:	628 HEBRON AVENUE
City:	GLASTONBURY
State:	CT
Zip Code:	06033
Country:	USA

Manufacturer Code:	LOCAL
Enterprise Name:	LOCALLY SUPPLIED

Manufacturer Code:	0AM53
Tool Number:	IAE 1F10026
Tool Name:	IAE 1F10026 Hydraulic hand pump

TASK 72-42-30-440-001 No. 4 Bearing Compartment Assembly - Assemble, Assembly-001

Export Control

Copyright

Applicability

Common Information

TASK 72-42-30-440-001 No. 4 Bearing Compartment Assembly - Assemble, Assembly-001

General

NOTE

NOTE

Preliminary Requirements

Pre-Conditions

Support Equipment

Consumables, Materials and Expendables

Spares

Safety Requirements

Procedure

SUBTASK 72-42-30-220-051 Reference the Fits and Clearances of the No. 4 Bearing Front Compartment at Location 2052

SUBTASK 72-42-30-220-052 Reference the Fits and Clearances of the No. 4 Bearing Front Compartment at Location 2053

SUBTASK 72-42-30-220-053 Reference the Fits and Clearances of the No. 4 Bearing Front Compartment at Location 2054

SUBTASK 72-42-30-220-054 Reference the Fits and Clearances of the No. 4 Bearing Front Compartment at Location 2055

SUBTASK 72-42-30-220-056 Reference the Fits and Clearances of the No. 4 Bearing Front Compartment at Location 2057

SUBTASK 72-42-30-440-051 Install the No. 4 Bearing Outer Race to the No. 4 Bearing Support

NOTE

SUBTASK 72-42-30-440-052 Install the No. 4 Bearing Retaining Nut and the No. 4 Bearing Key washer

NOTE

CAUTION

NOTE

SUBTASK 72-42-30-440-053 Install the No. 4 Bearing Oil Nozzle Assembly to the No. 4 Bearing Front Seal Assembly - Pre SB 72-0629

CAUTION

NOTE

NOTE

SUBTASK 72-42-30-440-061 Install the No.4 Bearing Oil Nozzle Assembly to the No.4 Bearing Front Seal Assembly - Post SB 72-0629

CAUTION

SUBTASK 72-42-30-720-051 Air Flow Check the No. 4 Bearing Front Seal Assembly and the No. 4 Bearing Pressure Tube

SUBTASK 72-42-30-440-055 Install the Spacers in the No. 4 Bearing Front Seal Assembly

SUBTASK 72-42-30-440-056 Turn the No. 4 Bearing Support in the Support Fixture

SUBTASK 72-42-30-440-057 Attach the No. 4 Bearing Front Seal to the No. 4 Bearing Front Support Assembly

SUBTASK 72-42-30-440-058 Install the No. 4 Bearing Front Cooling Duct

CAUTION

SUBTASK 72-42-30-440-059 Install the No. 4 Bearing Front Heatshield

CAUTION

NOTE

SUBTASK 72-42-30-440-060 Install the Covers for the No. 4 Bearing Front Compartment

CAUTION

Figure: Install the No. 4 Bearing Outer Race

Install the No. 4 Bearing Outer Race

Figure: Install the No. 4 Bearing Outer Race Retaining Nut and the Nut Lock

Install the No. 4 Bearing Outer Race Retaining Nut and the Nut Lock

Figure: Crimp the No. 4 Bearing Retaining Lock Nut

Crimp the No. 4 Bearing Retaining Lock Nut

Figure: Install the No. 4 Bearing Oil Nozzle in the No. 4 Front Bearing Seal Assembly (Pre SB 72-0629)

Install the No. 4 Bearing Oil Nozzle in the No. 4 Front Bearing Seal Assembly (Pre SB 72-0629)

Figure: Air Flow Check the No. 4 Bearing Front Seal and the No. 4 Bearing Pressure Tube

Air Flow Check the No. 4 Bearing Front Seal and the No. 4 Bearing Pressure Tube

Figure: Assemble the No. 4 Bearing Front Compartment

Assemble the No. 4 Bearing Front Compartment

Figure: No. 4 Bearing Front Compartment - Fits and Clearances

No. 4 Bearing Front Compartment - Fits and Clearances

Figure: No. 4 Bearing Front Compartment - Anti-Rotation Key-Washer Tabs Bending and Installation Limits (Pre SB 72-0629)

No. 4 Bearing Front Compartment - Anti-Rotation Key-Washer Tabs Bending and Installation Limits (Pre SB 72-0629)

Figure: Install the No.4 Bearing Oil Nozzle in the No.4 Front Bearing Seal Assembly (Post SB 72-0629)

Install the No.4 Bearing Oil Nozzle in the No.4 Front Bearing Seal Assembly (Post SB 72-0629)

Requirements After Job Completion

Follow-On Conditions