S 495-213-N00
 (6)  Install the PWA 85978 plug in the internal tube nut for the oil pressure tube on the exhaust case at the 10:30 o'clock position.
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SEE A
FLANGE P EXHAUST CASE
OIL PRESSURE TUBE (LP34)FLANGE N
FLANGE M
INTERNAL TUBE NUT AT THE 10:30 O'CLOCK POSITION OIL SCAVENGE
TUBE (LRO6)
SEE B
HOSE CLAMP
OIL PRESSURE
TUBE (LP33)
INTERNAL TUBE NUT AT THE 10 O'CLOCK POSITION
SPRAY SHIELD SEE C
SEE D
SEE E
SPRAY SHIELD
SEE H
OIL SCAVENGE TUBE (LRO6) SEEG SEEF
A
L-A4761
Engine Vacuum Test Component Location
Figure 510 (Sheet 1)

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////////////////////////A / PW4000 SERIES /747-400 / ENGINES /MAINTENANCE MANUAL ////////////////////////
OIL PRESSURE
TUBE (LP34)
NUT
(2 LOCATIONS)

HOSE CLAMP (EXAMPLE)
LAST CHANCE
STRAINER ELEMENT

FWD
PACKING
SPRAY SHIELD (EXAMPLE)
OIL PRESSURE TUBE (LP33)
BOLT (2 LOCATIONS)
B
FLANGE P BRACKET
BOLT
OIL PRESSURE
CLAMP
TUBE (FRONT)
(LA16)

FWD
NUT
SPACER
CLAMP

OIL SCAVENGE BOLT TUBE (LR06) OIL SCAVENGE TUBE (LR06)
NUT
C
L-A6116
D
L-A6115
Engine Vacuum Test Component Location
Figure 510 (Sheet 2)

G86057
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NUT 
BOLT 
CLAMP 
CLAMP 

BRACKET FLANGE N TUBE (LR06) OIL SCAVENGE  FWD  NUT  BOLT  FWD  BRACKET FLANGE N  OIL SCAVENGE TUBE (LR06) L-A6117 
E  F 
NUT 
BOLT  BRACKET FLANGE N  NUT  CLAMP HOSE  FLANGE M BRACKET 
BRACKET  SHIELD SPRAY  CLAMP 
FWD  NUT  BOLT 
TUBE (LR06) OIL SCAVENGE 
G BOLT  CLAMP  FWD  SPRAY SHIELD TUBE (LR05) OIL SCAVENGE  TUBE (LR06) OIL SCAVENGE 
H 
L-A6119 

Engine Vacuum Test Component Location
Figure 510 (Sheet 3)

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G86105
////////////////////////A / PW4000 SERIES /747-400 / ENGINES/MAINTENANCE MANUAL ////////////////////////
TEST NO. 12 - ENGINE VACUUM TEST
________________________________
 S 035-214-N00
 (7)  ENGINES WITHOUT PW SB 79-75; Disconnect and loosen the oil scavenge tube assembly (LR06) for the No. 4 bearing:
 (a)  
Remove the lockwire and disconnect the rear scavenge tube elbow from the internal tube nut on the exhaust case at the 10 o'clock position (Fig. 510, View A).

 (b)  
Remove the bolt, nut, and clamp which attach the spray shield to the flange M bracket at the 7 o'clock position (Fig. 510, View H).

 (c)  
Remove the hose clamp which attaches the forward end of the
 spray shield to the oil scavenge tube and remove the spray
 shield.

 (d)  
Disconnect the tube nut at Flange M from the tube adapter.

 (e)  
　
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