CAUTION
DO NOT ACTUATE THE DISCONNECT SWITCH FOR MORE THAN 3
SECONDS. ALLOW A MINIMUM OF 60 SECONDS BETWEEN
ACTUATION PERIODS. FAILURE TO FOLLOW THIS PROCEDURE CAN
CAUSE DAMAGE TO IDG.
(d) Set the 1 DISCONNECT switch on the P5 overhead panel to the DISCONNECT position.
(e) Make sure that the 1 DRIVE light comes on.
(f) Make sure that the AC meter on the P5 overhead panel shows these values:
1) AC VOLTS = 0
2) CPS FREQ = BLANK.
NOTE: When the AC voltage goes below approximately 12 VAC, the CPS FREQ
will become blank.
(g) Stop the No. 1 engine. Do this task: Stop the Engine Procedure (Usual Engine Stop),
TASK 71-00-00-700-819-F00.
(h) Do this task: Open the Fan Cowl Panels, TASK 71-11-02-010-801-F00.
WARNING
DO NOT TOUCH THE COMPONENTS OF THE OIL SYSTEM IF THE
ENGINE IS HOT. THESE COMPONENTS STAY HOTTER THAN OTHER
COMPONENTS. HOT COMPONENTS CAN BURN YOU.
WARNING
DO NOT LET HOT OIL GET ON YOU. PUT ON CLOTHES, GOGGLES,
AND OTHER EQUIPMENT FOR PROTECTION, OR LET THE ENGINE
BECOME COOL. HOT OIL CAN BURN YOU.
CAUTION
DO NOT RE-SET THE IDG IF THE INPUT SPEED OF THE ENGINE
GEARBOX IS MORE THAN 100 REVOLUTIONS PER MINUTE (RPM). IF
THE IDG IS RE-SET WITH THE ENGINE GEARBOX SPEED GREATER
THAN 100 RPM, DAMAGE TO THE IDG WILL OCCUR.
(i) Slowly pull the IDG Disconnect Reset Ring on the IDG to the outward travel limit. Monitor
the hand force necessary to pull the ring.
(j) Make sure that a click can be felt in the IDG Disconnect Reset Ring as it gets near the
outward limit of travel.
NOTE: Operation of the IDG Disconnect Reset Ring should be smooth with moderate
force necessary and no indication of binding.
(k) Allow the IDG Disconnect Reset Ring to slowly return to the maximum inward position.
(l) Slowly pull the IDG Disconnect Reset Ring on the IDG to the outward travel limit. Monitor
the hand force necessary to pull the ring.
(m) Make sure that the amount of hand force necessary is less than the amount required in
the previous pull.
(n) Make sure that no click is felt in the IDG Disconnect Reset Ring during the second pull.
1) If a click is produced during the second pull of the IDG Disconnect Reset Ring,
replace the IDG. These are the tasks:
• Integrated Drive Generator (IDG) Removal, TASK 24-11-11-000-801
• Integrated Drive Generator (IDG) Installation, TASK 24-11-11-400-801.
737-600/700/800/900
AIRCRAFT MAINTENANCE MANUAL
24-11-00
Page 506
D633A101-ILF Feb 15/2019
ECCN 9E991 BOEING PROPRIETARY - Copyright © Unpublished Work - See title page for details
EFFECTIVITY
ILF ALL
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