B. Procedure
S 864-002
(1) Open these circuit breakers and attach DO-NOT-CLOSE tags:
(a)
P6-2 Circuit Breaker Panel
1) PRESS IND SYS A
2) PRESS IND SYS B
(b)
P42 Five Volt Lighting Panel
1) 5V AC SEC XFMR
S 024-014
(2) Loosen the adjustment screw for the indicator clamp.
NOTE: The clamp adjustment screw is the larger screw found to the
____
right of the indicator.
S 024-004
(3)
Pull the indicator out from the instrument panel to get access to the electrical connector.
(4)
Disconnect the electrical connector.
(5)
Remove the hydraulic pressure indicator.
S 024-015
S 024-006
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737-300/400/500MAINTENANCE MANUAL
TASK 29-31-11-404-007
3. Hydraulic Pressure Indicator Installation
_________________________________________
A. References
(1)
AMM 24-22-00/201, Manual Control
(2)
AMM 29-09-00/201, Hydraulic Reservoir Pressurization System
(3)
AMM 29-15-00/201, Hydraulic Systems A, B, and Standby
B. Access
(1) Location Zone
101/102 Control Cabin
C. Procedure
S 424-009
(1)
Connect the electrical connector to the indicator.
S 424-016
(2)
Install the indicator into the instrument panel.
S 414-013
(3)
Tighten the adjustment screw for the indicator clamp.
NOTE: The clamp adjustment screw is the larger screw found to the
____
right of the indicator.
S 864-011
(4)
Remove the DO-NOT-CLOSE tags and close these circuit breakers:
(a)
P6-2 Circuit Breaker Panel
1) PRESS IND SYS A
2) PRESS IND SYS B
(b)
P42 Five Volt Lighting Panel
1) 5V AC SEC XFMR
(5)
Supply electrical power (AMM 24-22-00/201).
S 864-017
(6)
Pressurize system A and system B hydraulic reservoir (AMM 29-09-00/201).
(7)
Pressurize hydraulic system A and system B (AMM 29-15-00/201).
S 824-012
S 864-018
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737-300/400/500MAINTENANCE MANUAL
(8) S 714-019Make sure that a hydraulic pressure of 2800-3100 psi shows on the pressure indicator for system A and B.
(9) S 864-020Remove power from hydraulic system A and system B (AMM 29-15-00/201).
S 864-021
(10) Remove electrical power (AMM 24-22-00/201).
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737-300/400/500MAINTENANCE MANUAL
SYSTEM PRESSURE TRANSMITTER - REMOVAL/INSTALLATION
__________________________________________________
1. General_______
A. There are two tasks in this procedure. There is a task for the removal and a task for the installation of the system pressure transmitter.
B. The pressure transmitters for systems A and B are equivalent units. The pressure transmitters are installed on the forward wheel well bulkhead. You can get access to the system A transmitter through the left wheel well and the system B transmitter through the right wheel well.
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