(4)
CSD drain lines and at disconnect reset gland.
(5)
Oil supply line fill valve.
(6)
CSD line oil filter.
(7)
Oil cooler and fittings.
(a)
Check portion of oil coller which projects into engine fan air stream by removing hex nuts (6 places) and swinging cooler assembly out of engine casing. It should not be necessary to disconnect the IN and OUT oil lines at the cooler for this check.
NOTE: Cooler damage may have resulted from foreign objects ingested by the engine.
(b)
Install oil cooler. Tighten and lockwire hex nuts (6 places).
500
May 01/99 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 24-11-11 Page 407
GENERATOR CONSTANT SPEED DRIVE - ADJUSTMENT/TEST
1. General
A. The constant speed drive governor can be adjusted to change the output speed. Allowable generator output frequency is 400 +4 Hz. If frequency is out of tolerance, the governor should be adjusted to provide generator output frequency of 400 +1 Hz.
B. The constant speed drive disconnect can be tested by a static check or a dynamic check.
2. Adjust Generator Constant Speed Drive
A. Check that filter and magnetic plug show no indication of contamination or failure.
WARNING: USE EXTREME CARE WHEN DRAINING CSD OIL OR REMOVING CSD COMPONENTS. HOT OIL CAN CAUSE INJURY.
PROLONGED CONTACT WITH CSD OIL CAN CAUSE DERMATITIS. OIL WILL STAIN CLOTHING AND CAN SOFTEN PAINT.
NOTE: If filter or magnetic plug show indication of failure or contamination, or if frequency is unstable or erratic, or if frequency goes out of limits and stays out upon application or removal of loads, replace constant speed drive rather than adjust governor.
B. Start and run engine (Ref 71-09-100, Operating Procedure) for 3 minutes to allow system to reach operating temperature.
C. Check that frequency is stable during application or removal of load.
D. Record frequency to determine amount of adjustment necessary.
NOTE: If frequency is 400 +4 Hz, no adjustment is necessary.
E. Remove lockwire and insert screwdriver in adjustment screw slot on lower forward area of drive unit.
F. Turn adjustment screw clockwise to increase frequency, counterclockwise to decrease frequency. One full turn is equal to approximately 2 Hz.
G. Adjust as necessary to bring frequency to 400 +1 Hz.
H. After adjustment, secure screw with safety wire.
I. Shut down engine if engine operation is no longer required (Ref 71-09-100).
3. Generator Constant Speed Drive Disconnect Test
A. Following are two disconnect tests; only one need be performed. If engines are not operating, static-test the disconnect. If engines are running, dynamic-test the disconnect.
(1)
Static disconnect test.
(a)
Set BAT switch on P5 overhead panel to ON.
(b)
Remove lockwire and raise guard on DISCONNECT switch on P5 forward overhead panel and actuate switch.
(c)
Slowly pull disconnect reset handle on CSD to outward limit of travel, noting the amount of hand force required. A click will be felt as the disconnect reset handle is pulled. Operation of the handle should be smooth, require moderate force, and should not bind.
(d)
Allow handle to return slowly to the maximum inward position.
(e)
Slowly pull handle to outward limit of travel, noting the amount of hand force required. The force will be less than that required to pull handle first time. There will be no click as the handle is pulled.
(f)
Close and lockwire DISCONNECT switch guard on P5 panel.
(g)
Set BAT switch on P5 overhead panel to OFF.
(2)
Dynamic disconnect test.
(a)
Set BAT switch on P5 overhead panel to ON.
(b)
Start and run engine at idle speed (Ref 71-09-100, Operating Procedure).
(c)
Turn ac meters selector switch to GEN 1 or GEN 2 as applicable.
(d)
Check that voltage is indicated on ac voltmeter.
(e)
Remove lockwire and raise guard on DISCONNECT switch on P5 panel and actuate switch.
500
Feb 20/90 BOEING PROPRIETARY - Copyright . - Unpublished Work - See title page for details. 24-11-11 Page 501
CAUTION: DO NOT ACTUATE DISCONNECT BELOW MINIMUM ENGINE IDLE SPEED. DAMAGE MAY OCCUR AS A RESULT OF INCOMPLETE DISCONNECT.
DO NOT ACTUATE THE DISCONNECT SWITCH FOR PERIODS LONGER THAN 3 SECONDS. ALLOW A MINIMUM OF 60 SECONDS BETWEEN ACTUATION PERIODS. CSD MAY BE DAMAGED.
(f)
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