S 492-092
(5)
Do this task: "Installation of the Door Locks on the Body Landing Gear" (AMM 32-00-30/201).
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A
747-400 MAINTENANCE MANUAL
S 862-151
(6)
Supply electrical power (AMM 24-22-00/201).
S 862-152
(7)
Remove the pressure from hydraulic systems No. 1, 2, and 4
(AMM 29-11-00/201).
S 842-095
(8)
Do these steps to remove the hydraulic fluid from the hydraulic brake accumulator:
(a)
Look at the pressure indication of the HYD BRAKE PRESS gage on the Captain's Main Instrument Panel, P1.
(b)
Slowly push one set of brake pedals to the limit of travel, hold momentarily, and then release. Do this step 10 times.
(c)
Make sure the pressure indication of the HYD BRAKE PRESS gage decreases during manual brake operation.
(d)
After the 10 cycles of manual brake operation, make sure the measurement on the HYD BRAKE PRESS gage does not decrease in pressure.
S 862-096
(9)
Open this circuit breaker and attach a DO-NOT-CLOSE tag:
(a)
P180 DC Power Distribution Panel
1) 180J25 AUTOBRAKE
D.
Remove the Pressure Switch
S 032-097
(1) Disconnect the applicable electrical connector:
DS280 - to disconnect the right pressure switch DS281 - to disconnect the left pressure switch.
S 032-098
(2)
Put a cap on the plug of the wire bundle.
(3)
Put a cap on the receptacle of the pressure switch.
S 032-099
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747-400
MAINTENANCE MANUAL
AUTOBRAKE SHUTTLE VALVE
SEE A
CONNECTOR
BRAKE METERED PRESSURE SWITCH BACKUP RINGS O-RINGS BRACKET SUPPORT
VALVE SHUTTLE
AUTOBRAKE SHUTTLE VALVE
A
NOTE: THE LEFT SIDE INSTALLATION IS SHOWN, THE RIGHT SIDE INSTALLATION IS EQUIVALENT.
Brake Metered Pressure Switch Installation Figure 202
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747-400 MAINTENANCE MANUAL
S 032-142
(4)
Remove the lockwire that safeties the pressure switch to the shuttle valve.
S 022-101
(5)
Remove the pressure switch from the shuttle valve.
S 032-102
(6)
Put a plug in the open port of the shuttle valve.
S 032-103
(7)
Remove the O-rings and backup rings from the pressure switch and discard the O-rings.
TASK 32-42-12-402-104
5. Brake Metered Pressure Switch - Installation (Fig. 201)
____________________________________________
A. Consumable Materials
(1) D00288 Lubricant - MCS 352
NOTE: Use BMS 3-11 or MCS 352 to lubricate the
____
O-rings and fittings on the valve
assembly.
(2) D00196 Lubricant - BMS 3-11
NOTE: Use BMS 3-11 or MCS 352 to lubricate the
____
O-rings and fittings on the valve
assembly.
B. Access
(1) Location Zones
118 Electrical & Electronics Compartment, RH
(P180 DC Power Distribution Panel)
135 Wing Landing Gear Well - Left
(Aft Bulkhead, Wing Gear Wheel Well)
