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* Charge and scavenge oil filters
* Differential pressure indicator (pop-out)
* Oil level sightglass
* Drain plug
* Pressure fill adaptor.
Push-To-Vent Valve
The vent valve is a spring-actuated valve that keeps constant
internal pressure in the IDG case. You also push the button to
release the air pressure before you service the IDG with oil or
drain the oil.
Case Pressure Relief Valve
The case pressure relief valve prevents the IDG case from
rupture if the fuel/oil cooler leaks fuel into the oil system. The oil
vents into the area between the engine accessory gearbox and
the IDG. Fluid in this area drains overboard through the engine
drain system.
See the power plant section for more information on the engine
drain system.
Electrical Connectors
The IDG has two electrical connectors. Electrical connector A
has wire connections of systems with these functions:
* Neutral current transformer information to the GCU
* Disconnect solenoid power from the GEN DRIVE
DISCONNECT switch (P5)
* PMG AC power to the GCU.
Electrical connector B has wire connections of systems with
these functions:
GENERATOR DRIVE - INTEGRATED DRIVE GENERATOR (IDG)
EFFECTIVITY
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* Exciter field DC power input
* Oil pressure signal to the DRIVE light on the P5 panel.
Phase Lead Terminal
The three phase AC feeder wires and ground wire attach at this
terminal block.
Disconnect Reset Ring
You use the disconnect reset ring to reconnect the IDG after a
manual disconnect. The engine must not be turning when you
do a reset of the IDG.
Charge Oil Filter
The charge oil filter is downstream of the IDG charge pump. Oil
bypasses this filter if it becomes clogged. There is no visual
indication on the IDG that this filter is in the bypass condition.
You replace the charge oil filter on regular intervals. See the
SERVICING page in this section for more information.
Scavenge Oil Filter
The scavenge oil filter is downstream of the IDG scavenge
pump. Oil bypasses this filter if it becomes clogged. You replace
the scavenge oil filter on regular intervals. See the SERVICING
page in this section for more information.
Differential Pressure Indicator
The differential pressure indicator is in the IDG scavenge oil
system and monitors pressure upstream and downstream of
the scavenge oil filter. The indicator supplies a visual indication
of a clogged scavenge filter. A temperature lockout feature
prevents a false differential pressure indication during engine
start with cold oil.
Oil Level Sightglass
The oil level sightglass shows the relative amount of oil in the
IDG. You use the sightglass to do a check of the oil quantity. See
the SERVICING page in this section for more information.
Drain Plug
You remove the drain plug to drain the IDG oil. See the
SERVICING page in this section for more information.
Pressure Fill Adaptor
You use the pressure fill adaptor when servicing the IDG oil
level. See the SERVICING page in this section for more
information.
Safety Lanyards
Three lanyards attach to the IDG and the engine. These
lanyards keep the IDG on the engine if there is very high engine
vibration. You must disconnect the lanyards from the IDG for
IDG removal.
GENERATOR DRIVE - INTEGRATED DRIVE GENERATOR (IDG)
EFFECTIVITY
GUN ALL 24-10-00
Page 12
D633A101-GUN Oct 10/2002
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
24-10-00-010
GENERATOR DRIVE - INTEGRATED DRIVE GENERATOR (IDG)
GENERATOR DRIVE - INTEGRATED DRIVE GENERATOR (IDG)
EFFECTIVITY
GUN ALL 24-10-00
Page 13
D633A101-GUN Feb 10/2003
BOEING PROPRIETARY - Copyright#- Unpublished Work - See title page for details.
737-600/700/800/900 AIRCRAFT MAINTENANCE MANUAL
24-10-00-010
Purpose
The quick attach/detach (QAD) adapter attaches the IDG to the
engine accessory gearbox (AGB).
Location
The QAD adapter is on the front face of the AGB.
General
The QAD adapter has these parts:
* Engine adapter plate
* Ring
* Tension bolt.
Screws hold the engine adapter plate to the AGB. The engine
adapter plate has an alignment mark near the 4 o’clock position
(when looking aft).
The ring is on the engine adapter plate. The ring is free to turn
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