(b)  
If the filter element for the EMDP contains metal contamination, replace the EMDP (AMM 29-15-22/401).

 S 162-070
 S 022-113
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A

737-300/400/500
MAINTENANCE MANUAL

HYDRAULIC SYSTEM
SEE A
SYSTEM A PRESSURE MODULE
SEE B
FWD
SYSTEM B PRESSURE MODULE
SEE C
HYDRAULIC SYSTEM A
Hydraulic Systems A and B Pressure Module Figure 201 (Sheet 1)
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A
737-300/400/500MAINTENANCE MANUAL
PRESSURE SWITCHES
MOUNTING BOLTS (EXAMPLE)
CHECK VALVE FWD SEE D
FILTER RELIEF VALVE
SEE D SEE E
SYSTEM A PRESSURE MODULE
B
PRESSURE SWITCHES
CHECK VALVE
SEE D FWD
FILTERS MOUNTING BOLTS (EXAMPLE)
SEE D RELIEF VALVE
SEE E
SYSTEM B PRESSURE MODULE
C
Hydraulic Systems A and B Pressure Module
Figure 201 (Sheet 2)

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A 737-300/400/500MAINTENANCE MANUAL
BACKUP
RING

O-RING
CHECK VALVE
FITTING
BACKUP RING O-RING
FILTER BOWL
FILTER (EXAMPLE)

D

RELIEF VALVE
O-RING RING RELIEF VALVE
(EXAMPLE)

E
Hydraulic Systems A and B Pressure Module Figure 201 (Sheet 3)
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A
737-300/400/500MAINTENANCE MANUAL
 (c)  
If you find metal contamination in the pressure filter, flush the hydraulic lines between the pressure module and the hydraulic pump you removed.

 (d)  
If you find metal contamination in the EMDP pressure filter, examine the acoustic filter (AMM 29-15-27/401).

 S 032-087
 (7)  Discard the filter element.
 TASK 29-15-71-402-080
 5.  Pressure Filter Installation (Fig. 201)____________________________
 A. References
 (1)  
AMM 29-09-00/201, Hydraulic Reservoir Pressurization System

 (2)  
AMM 29-15-00/201, Hydraulic Systems A, B and Standby

 B. Access
 (1)  Location Zone
 216 Main Wheel Well, LH
 217 Main Wheel Well, RH

 C. Procedure
 S 642-064
 (1)  
Apply assembly lube or hydraulic fluid to the O-ring and the backup ring.

 S 432-065

 (2)  
Install the O-ring and the backup ring in the groove of the module housing.

 S 642-066

 (3)  
Apply assembly lube or hydraulic fluid to the O-ring and the backup ring.

 S 432-067

 (4)  
Install the O-ring and the backup ring in the groove at the top of the filter element with the O-ring at the top.

 S 642-075

 (5)  
Lightly apply assembly lube or hydraulic fluid to the filter bowl threads.

 (6)  
Fill the filter bowl approximately half full with hydraulic fluid.

 S 612-076
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