S 422-036
(2)
Put the servo valve over the seal plate and install the four capscrews.
S 432-037
(3)
For the servo valves with the Suffix A after the serial number, tighten the screws 65 to 70 pound-inches.
S 432-038
(4)
For the servo valves without the Suffix A, tighten the screws 95 to 100 pound-inches.
S 432-039
(5)
Connect the electrical plug and attach it to the servo valve with lockwire.
(6)
Do a test on the control module (AMM 32-43-01/501).
S 722-040
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737-300/400/500MAINTENANCE MANUAL
TASK 32-43-46-002-041
9. Pressure Switch Removal (Fig. 201)
_______________________
NOTE: This applies to the pressure switch of the solenoid shutoff valve and
____
the pressure switch of the servo valve.
A. References
(1)
29-15-00/201, Hydraulic Systems
B.
Access
(1)
Location Zone
101 Control Cabin - Left
216 Left Main Wheel Well
217 Right Main Wheel Well
C.
Remove the Pressure Switch
S 842-042
(1)
Release the parking brake.
S 842-043
(2)
Remove the pressure from hydraulic systems A and B
(AMM 29-15-00/201).
S 032-044
(3)
Disconnect the electrical plug from the pressure switch.
(a)
Seal the plug and the receptacle with plugs.
S 022-045
(4)
Remove the pressure switch and discard the O-ring and the backup rings.
(a)
Seal the port with a cap.
TASK 32-43-46-402-046
10. Pressure Switch Installation
____________________________
NOTE: This applies to the pressure switch of the solenoid shutoff valve and
____
the pressure switch of the servo valve.
A. Consumable Materials
(1)
D00400 Fluid - Hydraulic, BMS 3-11
B.
References
(1)
24-22-00/201, Manual Control
(2)
29-15-00/201, Hydraulic Systems
(3)
32-43-01/501, Automatic Braking System
C.
Access
(1)
Location Zone
101 Control Cabin - Left
102 Control Cabin - Right
216 Left Main Wheel Well
217 Right Main Wheel Well
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A
737-300/400/500MAINTENANCE MANUAL
D. Procedure
S 422-047
(1)
Install the new O-ring and the backup rings on the pressure switch.
(a)
Lubricate the O-ring and backup rings with BMS 3-11 during installation.
S 422-048
(2)
Install the pressure switch in the module.
(a)
Tighten the switch to a torque of 90 to 110 pound-inches.
S 722-049
(3)
Do a test on the pressure switch.
(a)
Do a check on the switch connector receptacle between pins 2 and 3 for continuity.
(b)
Install the electrical plug and the lockwire.
(c)
Do a test on the control module (Ref 32-43-01/501).
S 842-050
(4)
Pressurize hydraulic system B (AMM 29-15-00/201).
S 842-051
(5)
Set the parking brake.
(6)
Remove the pressure from hydraulic system B (AMM 29-15-00/201).
(7)
Close the AUTOBRAKE CONTR circuit breaker on the P6-3 panel.
(8)
Remove the electrical power if it is not needed (AMM 24-22-00/201).
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