FWD
A
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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE A
SEE B
OIL TANK (REF) 
FWD 
A 

No. 3 Bearing Breather Tube Inspection
Figure 606 (Sheet 1)

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SEE E SEE D SEE F
FLANGE K DIFFUSER CASE INTERNAL TUBE
SEE C
NUT FWD
TUBE N0. 3 BEARING
NUT BREATHER TUBE (UPPER)
N0. 3 BEARINGSEE G BREATHER TUBE (LOWER)
BOLT
(3 LOCATIONS)

ENGINE OIL TANK (REF)
PACKING MAIN GEARBOX NUT (REF) CLAMP-
BRACKET B BOLT SHELL(REF)
CLAMP CLAMP  BRACKET (REF)
BOLT
DC
BOLT
BOLT CLAMP-CLAMP SHELL CLAMP
BRACKETCLAMP-NUT
SHELL (REF)
HPC AIR
BRACKET
NUT  CLAMP VALVE BRACKET
(REF)  BOLT
NUT
FG E
NOTE: QEC EQUIPMENT NOT SHOWN FOR CLARITY
No. 3 Bearing Breather Tube Inspection
Figure 606 (Sheet 2)

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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SEE A
HEAT SHIELD

SCREW WASHER
BOLT NUT WASHER
FWD
SCREW WASHER
MAIN GEARBOX (REF)
NOTE: IDG SHOWN ALREADY REMOVED.
A

No. 3 Bearing Oil Scavenge Manifold Inspection
Figure 607 (Sheet 1)

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DIFFUSER CASE
INTERNAL NUT

TUBE
SEE B
NUT
FOR THE NO. 3 BEARING OIL SCAVENGE MANIFOLD 
THE NO. 4 BEARING (REF) OIL SCAVENGE TUBE FOR 
SEE  C 
OIL PUMP (REF) AND SCAVENGE LUBRICATION 
SEE  D BOLTS  LUBRICATION AND SCAVENGE OIL PUMP (REF)  B 
(QTY 2) CLAMPSHELLS CLAMP  MAIN GEARBOX (REF) 
OIL SCAVENGE TUBE NO. 4 BEARING (REF) NUTS PACKING  SCAVENGE MANIFOLD NO. 3 BEARING OIL FWD  BRACKET  2 HARNESS LUGS 
WIRE HARNESS 
1 3 2  WITHOUT PW SB 79-75 ENGINES WITH PW SB 79-46 AND THAT HAS A STUD AND LUG CONNECTOR ENGINES WITH A THEROCOUPLE PROBE THAT HAS A PIN AND SOCKET CONNECTOR ENGINES WITH A THERMOCOUPLE PROBE  1  C  3  CONNECTOR ELECTRICAL  (3 LOCATIONS) BOLT  L-A4709 
Figure 607 (Sheet 2) No. 3 Bearing Oil Scavenge Manifold Inspection 

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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
SCAVENGE OIL PUMP (REF) LUBRICATION AND MAIN GEARBOX (REF) 
2 
FWD 
HARNESS LUGS 
NO. 3 BEARING OIL SCAVENGE MANIFOLD  BRACKET 
　
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