B.
References
(1)
AMM 29-15-00/201, Hydraulic Systems A, B, and Standby
(2)
AMM 32-00-01/201, Landing Gear Ground Lock Assemblies
C.
Access
(1)
Location Zones
217 Body Landing Gear Well - Right
(Hydraulic Brake Pressure Transmitter)
102 Control Cabin - Right (P6 Main Power Distribution Panel)
D. Prepare for the Removal
S 494-002
(1)
Make sure that the ground locks of the landing gear are installed in the main landing gear (AMM 32-00-01/201).
S 864-008
(2)
Remove the pressure from hydraulic systems A and B
(AMM 29-15-00/201).
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-41-52
ALL ú ú 01 Page 401 ú Nov 12/00
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
FLOW FLOW FUSE FUSE
OVERHEAD AUTOBRAKE CONTROL MODULE
ACCUMULATOR ALT BRAKE
ISOLATION SELECTOR VALVE
VALVE
ANTISKID ANTISKID SHUTTLE BRAKE METERING SHUTTLE VALVES VALVE ASSY VALVES
(2 LOCATIONS)
RIGHT LEFT LEFT
ALTERNATE PARKING BRAKE ANTISKID ALTERNATE
ANTISKID SHUTOFF VALVE OUTBD CONTROL ANTISKID
VALVE CONTROL BRAKE FLOW VALVES SHUTTLE AUTOBRAKE INBD BRAKE VALVES FLOW CONTROL VALVE
FUSES FUSES
INBD RIGHT ANTISKID
OUTBD CONTROL VALVES
ACCUMULATOR WHEEL WELL
SEE A
AFT BULKHEAD STA 727
BRAKE PRESSURE TRANSMITTER BL 0
VIEW IN THE AFT DIRECTION
BRAKE PRESSURE TRANSMITTER
LINE
PRESSURE GAGE
CHARGING VALVE MANIFOLD
FWD INBD UNION ANDELECTRICAL BRAKE CLAMP AND PACKINGCONNECTOR ACCUMULATOR BOLTS
(REF)
A
Brake Pressure Transmitter Figure 401
G38276
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. ú
32-41-52
ALL ú ú 01 Page 402 ú Mar 15/97
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A
737-300/400/500MAINTENANCE MANUAL
S 864-009
(3)
Do these steps to remove the pressure from the hydraulic brake accumulator:
(a)
Look at the pressure indication of the HYD BRAKE PRESS gage on the First Officer's Instrument Panel, P3.
(b)
Slowly push one set of brake pedals to the limit of travel, hold momentarily, and then release. Repeat this cycle 12 times.
(c)
Make sure the pressure indication of the HYD BRAKE PRESS gage decreases during manual brake operation.
(d)
After the 12 cycles of manual brake operation, make sure the HYD BRAKE PRESS gage shows no more decrease in pressure.
S 034-010
(4)
Do these steps to release the gas pressure from the hydraulic brake accumulator:
(a)
Remove the cap from the brake accumulator charging valve (Fig. 401).
WARNING:_______DO NOT LOOSEN THE BODY OF THE CHARGING VALVE. THE REMAINING PRESSURE IN THE ACCUMULATOR CAN QUICKLY PUSH THE GAS CHARGING VALVE OFF THE MANIFOLD. THIS CAN CAUSE INJURY TO PERSONS OR DAMAGE TO EQUIPMENT.
(b)
Turn the swivel nut on the charging valve a maximum of 2-1/2 turns counterclockwise to release the gas from the hydraulic brake accumulator.
(c)
Make sure the pressure indication of the direct reading pressure gage goes to zero.
S 864-019
(5)
Open this circuit breaker and attach DO-NOT-CLOSE tag:
(a)
On the P6 Main Power Distribution Panel:
1) 6A17, HYD BRAKE PRESS IND
E.
Pressure Transmitter - Removal
S 024-011
(1)
Do these steps to remove the transmitter:
(a)
Disconnect electrical connector from the transmitter.
