S 225-077
(5)
Make sure the precharge pressure is +/- 50 psi of the necessary pressure in Figure 505.
(a)
If the pressure is not +/- 50 psi, charge the accumulator
(AMM 12-15-11/301).Do a test on the accumulator operation.
S 845-055
(1)
Pressurize system B to 3000 +150/-200 psi and keep this pressure for a minimum of two minutes (AMM 29-15-00/201).
S 215-056
(2)
Make sure that the HYD BRAKE PRESS gage on the flight compartment is in 100 psi of the HYD SYS PRESS gage of system B.
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737-300/400/500MAINTENANCE MANUAL
S 845-057
(3)
Remove the pressure from systems A and B (AMM 29-15-00/201).
S 725-059
(4)
Fully push the brake pedals of the captain 5 times.
NOTE: Stop approximately 3 seconds between each time you push
____
and release brake pedals.
(a)
Make sure that the brake accumulator pressure decreases after each time that you push and release the brake pedals.
(b)
Make sure that the brake pressure is not less than 800 psi after the fifth time that you push and release the brakes.
S 725-060
(5) Make sure the brakes operate each time you push the brake pedals.
TASK 32-41-00-805-064
5. Put the Airplane Back to Normal
_______________________________
A. References
(1)
AMM 24-22-00/201, External Electrical Power
(2)
AMM 29-15-00/201, Hydraulic Systems
B.
Access
(1)
Location Zones
101 Control Cabin - Left
102 Control Cabin - Right
216 Left Main Wheel Well
217 Right Main Wheel Well
310 Left Main Landing Gear
410 Right Main Landing Gear
C.
Procedure
S 845-065
(1)
Remove the pressure from the hydraulic system A and B (AMM 29-15-00/201).
S 845-066
(2)
Remove the pressure gages from each brake bleed port and install the bleed screw.
(3)
Pressurize hydraulic systems A and B (AMM 29-15-00/201).
S 845-067
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NOT USED
Figure 504
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T93507
A 737-300/400/500MAINTENANCE MANUAL
FWD INBD
PRESSURE RELIEF VALVE BRAKE ACCUMULATOR
CHARGING INSTRUCTIONS-HYDRAULIC ACCUMULATOR WITH SYSTEM DEPRESSURIZED CHARGE WITH DRY NITROGEN TO APPLICABLE PRESSURE PER CHART BELOW - | 50 PSI
1400
BRAKE PRESSURE TRANSMITTER
CHARGING
VALVE
SERVICING DECAL
SEE A
PRESSURE
GAGE
PRESSURE-
PSI GAGE
1200 1000
800 600 -50 -25 0 +25 +50 +75 AMBIENT TEMP - ` CENTIGRADE
A
Brake Hydraulic Accumulator Precharge Check
Figure 505
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(4) S 845-068Make sure that the accumulators are charged (refer to the placard).
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