(10)
Set No. 1 "B" hydraulic system pump switch to OFF. Check that No. 1 hydraulic pump stop operating and No. 2 hydraulic pump start operating.
(11)
Set No. 1 "B" hydraulic system pump switch to ON. Check that No. 2 hydraulic pump stops operating and No. 1 hydraulic pump start operating.
(12)
Set No. 2 GEN switch to ON and check for No. 2 hydraulic pump operation.
(13)
Set No. 1 and No. 2 "B" hydraulic system pump switches to OFF.
(14)
If electrical power is no longer required, restore airplane to normal (par. 6).
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C. Test "B" Hydraulic System Power Source Transfer with APU Operating
(1)
Operate APU (Ref. 49-11-0 MP)
(2)
Connect APU to tie bus
(a) Set left and right APU GEN control switch to ON.
(3)
Place No. 1 "B" hydraulic system pump switch to ON, and check that No. 1 hydraulic pump operates.
(4)
Place No. 2 "B" hydraulic system pump switch to ON, and check that No. 2 hydraulic pump operates.
(5)
Set left APU GEN control switch to OFF. Check that No. 1 hydraulic pump stops operating.
(6)
Set No. 2 "B" hydraulic pump switch to OFF, check that No. 2 hydraulic pump stops operating, and No. 1 hydraulic pump starts operating.
(7)
Set No. 2 "B" hydraulic system pump switch to ON. Check that No. 1 hydraulic stops operating, and that No. 2 hydraulic pump starts operating.
(8)
Set left APU GEN control switch to ON and check that No. 1 hydraulic pump starts operating.
(9)
Set right APU GEN control switch to OFF and check that No. 2 hydraulic pump stops operating.
(10)
Set No. 1 "B" hydraulic system pump switch to OFF. Check that No. 1 hydraulic pump stops operating and No. 2 hydraulic pump starts operating.
(11)
Set No. 1 "B" hydraulic system pump switch to ON. Check that No. 2 hydraulic pump stops operating and No. 1 hydraulic pump starts operating.
(12)
Set right APU GEN control switch to ON and check that No. 2 hydraulic pump is operating.
(13)
Set No. 1 and No. 2 "B" hydraulic system pump switches to OFF.
(14)
If electrical power is no longer required, restore airplane to normal (par. 6).
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6. Restore System to Normal
A. Turn off lights, galleys, air conditioning and fuel boost pumps if no longer required.
B. Remove generator power.
(1)
Shut down engines (Ref 71-09-100 Operating Procedure).
(2)
Shut down APU (Ref 49-11-0 MP).
(3)
Place BAT switch to OFF.
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ENGINE-DRIVEN AC GENERATOR - REMOVAL/INSTALLATION
1. Equipment and Materials
A. Dow Corning DC4 or Mobilgrease 28 (Ref 20-30-21)
2. Remove Generator (Fig. 401)
A. Open engine cowl panels.
B. Remove generator and exciter terminal covers.
C. Remove generator and exciter terminal leads from studs.
NOTE: Observe terminal markings and tag each lead to ensure correct installation later.
If necessary, loosen release screws on quick-release clamps and move engine firewall fire detection sensing element to one side (Ref 26-11-11, R/I).
D. Remove exhaust duct support bracket (4) by removing bolts at duct support plate (5), hook assembly, and exhaust duct (6).
E. Remove exhaust duct and electrical bracket assembly (6) from collector ring (7).
F. Remove nut from tee-bolts locking two halves of collector ring and remove collector ring.
G. Remove generator cooling air inlet duct.
(1)
Remove clamp (1) between two portions at inlet cooling air duct.
(2)
Remove clamp (2), disconnect jumper, and remove elbow (3) or forward portion of inlet cooling air duct along with air blast connector cap (9).
H. Loosen generator mounting nuts around generator flange (12 places).
NOTE: Generator mounting holes are slotted to permit generator removal with nuts left on studs. Nuts must be backed off about 1/2 inch to permit rotation of generator frame without interference from nuts. It may be necessary to tap generator with rubber mallet to permit rotation.
I. Support generator.
J. Rotate generator frame counterclockwise, viewed from aft, until studs line up with flange openings, move straight aft until studs clear generator flange.
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