(2)
The left brake cable loop is driven by a quadrant connected by a short shaft to the captain's left brake bellcrank. Similarly the right brake cable loop is driven by a quadrant connected by a short shaft to the first officer's right brake bellcrank. The captain's right brake bellcrank is mounted on the shaft that is part of the captain's left brake bellcrank and quadrant assembly and is free to rotate on this shaft. This bellcrank is connected by a transverse control rod to the first officer's right brake bellcrank and thus, to the right cable quadrant. The first officer's left brake bellcrank is in a similar manner, connected to the captain's left brake bellcrank and thus to the left cable system. This interconnecting mechanism allows the pilot's equal and simultaneous control.
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MAINTENANCE MANUAL
CONTROL SEE B CABLES
SEE B
QUADRRANT(PART OFTURNBUCKLES BRAKE
MODULE) METERINGVALVE
DE-SPIN
ASSEMBLY
LGB4A ACTUATOR
(PART OF(PART OF
MODULE)
LGB4B VALVE)
TURNBUCKLES RODASSEMBLY
WHEEL WELL
LGB2A FORWARD
(PART OF LGB2B BULKHEAD
MODULE)
FIRST OFFICER'SBRAKE PEDALS
INPUTCRANK SEE A
(PART OFMODULE)
BRAKE METERING VALVE ASSEMBLY(LEFT SIDE INSTALLATION SHOWN;RUDDER SYSTEM RIGHT SIDE INSTALLATION SIMILAR)
BRAKE SYSTEM
CONTROL RODS (REF) B CAPTAIN'SHOUSING
BRAKE PEDALS
HOUSING
LGB4A RUDDER SYSTEMCONTROL RODS(REF)
LGB4B BUSRODS
BRAKE SYSTEM
BRAKE
BRAKE SYSTEM
CONTROL RODS CONTROL RODS
(2 PLACES) (2 PLACES)
LGB2B
FWDBRAKE ASSEMBLYSEE CLGB2A
(ON WHEELS)
C MAIN LANDING GEAR A
Hydraulic Brake System Compoment Location
Figure 1 (Sheet 1)
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MAINTENANCE MANUAL
CHARGING LINE
ACCUMULATOR
SEE F SEE D
SEE E
RIGHT WHEEL WELL
LEFT SYSTEM PRESSURE LINE
HYDRAULIC
LINE
PRESSURE ACCUMULATOR
TRANSMITTER ISOLATION
(REF) VALVE
D
PLUGGED BRAKE LINEPRESSURELEFT SYSTEM
PORT
SWITCHPRESSURE LINE
RIGHT SYSTEM PRESSURE LINE
GEAR UP
PRESSURE
LINE THERMAL RELIEF CHECK VALVE
BRAKE
LINE INBD FWD
ALTERNATE BRAKE SELECTOR VALVE
RIGHT SYSTEM
PRESSURE LINE
F
E
Hydraulic Brake System Component Location
Figure 1 (Sheet 2)
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MAINTENANCE MANUAL
B. Cable Linkage (Fig. 1)
_____________
(1)
The cable system transmits pilot's brake pedal input from the pedal and quadrant linkage to the brake metering valve module quadrant assembly. The metered brake pressure is a function of valve slide displacement as the cable operated quadrant rotates the metering valve input shaft. The brake cable system allows the brake pedals to rotate as metered pressure increases due to cable stretch being proportional to cable tension.
(2)
The cables are 3/32 inch diameter and consist of two separate fore-aft runs. The left brake control cables run down the left side of the body and the right brake control cables run down the right side of the body beneath the passenger compartment floor panels.
(3)
One set of cables on each side of the fuselage drive both metering valves mounted on the corresponding metering valve module. Similarly the other set drives the opposite side brake metering valve module. The cables operate a quadrant and linkage on each module which drives both metering valves through a single input shaft.
(4)
The cables leave the pressurized portion of the body at the upper forward section of the wheel well. Turnbuckles join forward and aft segments of each cable run.
C.
Brake Metering Valve Module Assembly (Fig. 1, 2)
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