4. Procedure
_________ Subtask 49-26-53-420-050
A. Installation of the Regulating Gearbox Valve
(1)
Remove the blanking plugs.
(2)
Apply a thin layer of OILS (Material No. 03-002) to the O-rings (2),
(10) and (11).
(3)
Install the new O-ring (2), O-ring (10) and O-ring (11) on to the transfer tube (1).
(4)
Install the transfer tube (1) into the APU.
(5)
Install the adapter (3) on to the transfer tube (1) with the washers
(9) and bolts (8).
(6)
TORQUE the bolts (8) to 0.56 m.daN (49.55 lbf.in).
(7)
Install the gearbox regulating valve (7) with the washers (4) and the bolts (5).
(8)
TORQUE the bolts (5) to 0.56 m.daN (49.55 lbf.in).
(9)
Install the tube (6) on the gearbox regulating valve (7).
(10) TORQUE the tube (6) B-nut to between 5.31 and 6.22 m.daN (39.15 and
45.87 lbf.ft).
Subtask 49-26-53-420-051
B. Installation of the Regulating Gearbox Valve (On APU's with series 5/ change 105 on the Mod. Plate). (Ref. Fig. 402/TASK 49-26-53-991-002)
(1)
Remove the blank plugs installed on tube ends (1) and (3).
(2)
Remove the blank plugs installed on the new valve (2).
(3)
Position the valve (2) between tubes (1) and (3).
(4)
Connect the B-nuts (1) and (3).
(5)
Hold the valve (2) firmly with a second wrench to prevent torque transfer.
(6)
TORQUE the B-nut (1) to between 5.31 and 6.22 m.daN (39.15 and 45.87 lbf.ft)
(7)
TORQUE the B-nut (3) to between 2.43 and 3.16 m.daN (17.92 and 23.30 lbf.ft)
Subtask 49-26-53-865-053
C. Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s): 1KD, 2KD.
Subtask 49-26-53-410-051
D. Close the APU access doors 315AL, 316AR. Subtask 49-26-53-710-050
E. Operate the APU for five minutes. (Ref. TASK 49-00-00-860-003) Subtask 49-26-53-010-052
F. Open the APU access doors 315AL, 316AR. Subtask 49-26-53-790-050
G. Examine the gearbox pressure-regulator valve area for oil leaks.
NOTE : No leaks are permitted.
____ 5. Close-up
________ Subtask 49-26-53-410-050
A. Close Access
(1)
Make sure that the work area is clean and clear of tool(s) and other items.
(2)
Close the APU access doors 315AL, 316AR (Ref. TASK 52-41-00-410-001).
(3)
Remove the access platform(s). Subtask 49-26-53-865-054
B.
Remove the safety clip(s) and the tag(s) and close this(these) circuit breaker(s):
-------------------------------------------------------------------------------PANEL DESIGNATION IDENT. LOCATION -------------------------------------------------------------------------------121VU APU/APU/CTL 2KD L42 121VU APU/ECB/SPLY 1KD L41
Subtask 49-26-53-860-052
C. Aircraft Maintenance Configuration
(1)
Pressurize the reservoirs of the hydraulic systems.
(Ref. TASK 29-14-00-614-002).
(2)
De-energize the ground service network
(Ref. TASK 24-42-00-862-001).
(3)
Remove the warning notice(s).
ADAPTER - AIR/OIL SEPARATOR - REMOVAL/INSTALLATION
__________________________________________________ TASK 49-26-54-000-003 Removal of the Air/Oil Separator Adapter
1.
Reason for the Job
__________________
Self Explanatory
2.
Job Set-up Information
______________________
A. Fixtures, Tools, Test and Support Equipment
-------------------------------------------------------------------------------REFERENCE QTY DESIGNATION -------------------------------------------------------------------------------
No specific circuit breaker(s) safety clip(s) No specific access platform 3.5 m (11 ft. 6 in.) No specific 1 CONTAINER 10 L(2 1/2 USGAL)
B. Referenced Information
-------------------------------------------------------------------------------REFERENCE DESIGNATION -------------------------------------------------------------------------------
24-42-00-861-001 Energize the Ground Service Network from the External Power 29-00-00-864-001 Put the Related Hydraulic System in the Depressurized
Configuration before Maintenance Action 52-41-00-010-001 Open the APU Doors for Access 49-26-54-991-001 Fig. 401
3. Job Set-up
__________ Subtask 49-26-54-860-050
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