24-11-00
ú CONFIG ú 01 Page 3 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
A 737-300/400/500MAINTENANCE MANUAL
115V AC
TRANSFER
BUS 1 GEN DR OIL
NO. 1 LOW
R1
PRESS
P6-4 CIRCUIT BREAKER PANEL
CONTROL
L1
12
VENT AND
STANDBY
CYLINDER
LOW OIL
LOW OIL
PRESSURE 2
VACUUM
2
PWR OFF PRESSURE
VALVE
L3
STANDBY POWERHIGH OIL
HIGH OIL
A3 PRINTED CIRCUIT ASSY
TEMP
TEMP
DISCONNECT DISCONNECT
1
S1
BAT OFFAUTO
DRIVE TEMP
RISE
VAR. DISPL.
S3
FIXED
A
LUBEPORT
HYDRAULIC
DISPL.
1
UNIT
HYD.UNIT
IN
A
DRIVE CAN BE
RECONNECTED
RISE ONLY ON RISE
1020 GRD 1020
AXIAL GEAR
L1 GEN 1 LOW OIL PRESSURE
IN IN
DIFFERENTIAL
ENG ACCESLOW OIL
0 80120 30 0 80120 30
N68
40 160 40 160
GEAR BOX
PRESSURE
GEN DRIVE GEN DRIVE
A
SWITCH
1
OIL TEMP OIL TEMP
A
`C `C L3 GEN 1 HIGH OIL TEMP VENT GEN
RESERVOIR
28V DCDISCONNECT
DRAIN DRIVENO. 1
BAT BUS SOLENOID
TO GEN
SWIRL
CSD CONT
SWITCH 1 CHAMBER CHARGE
AC
CHARGERELIEF
BUS 1
28V DC
FILTER VALVEGEN PR OILNO. 1 TEMP S1 GEN DRIVEP6-4 CIRCUIT BREAKER PANEL
CHG
SCAVENGERPMP
DISC SWITCHPUMP
OIL OUT
TEMP SENSOR
315` F
(157` C)
GOVERNORRISE
S754 CSD OIL
T
OVERHEAT SW
OIL INTEMP SENSOR
T
IN
G6 CONSTANT
S3 DRIVE
TANKTEMP SELECT
SPEED DRIVE
DRAIN
CSD DRAINPRESSUREPLUG ANDRESET HANDLE
ENG 1GOVERNORDIFFERENTIAL MAGNETIC ADJUSTMENTLOCATIONINDICATOR CHIP DETECTORN68 DRIVE OIL TEMP P5-5 GEN DRIVE AND STANDBYOF CSD OIL
IND-1 (P5-5) OVHT SW
____ ENGINE 1 CSD DIAGRAM SHOWN1 TO MASTER WARNING ANDLIGHT PLATE WILL SHOWSUPPLY
NOTE:2 LINE
FILL
ENGINE 2 CSD DIAGRAM SIMILAR CAUTION CIRCUITS "DRIVE" ON SOME AIRPLANES FILTER PORT PRESSURE
COOLER SYSTEMRETURN
Constant Speed Drive Schematic Diagram
Figure 2
EFFECTIVITYùùùùùùùùùùùùùùùùùùùùùùùùùùùùùù. CONSTANT SPEED DRIVES ú
24-11-00
ú CONFIG 1 ú 01 Page 4 ú Nov 12/01
BOEING PROPRIETARY - Copyright (C) - Unpublished Work - See title page for details.
E36032
A 737-300/400/500MAINTENANCE MANUAL
3. CSD Mechanical Differential and Hydraulic Units (Fig. 3)
_______________________________________________
A. The differential is a folded type with planet gears in the center and input and output ring gears on the outside. The plate gears rotate about their own axes and also revolve about the centerline of the planet gear carrier. The planet gear carrier is driven by drive input. The variable displacement hydraulic unit is also driven by the transmission input. The fixed displacement hydraulic unit is hydraulically coupled to the variable displacement unit and is connected to the differential through the input ring gear. The output ring gear of the differential is connected to the transmission output. Constant speed of the output ring gear is maintained by either adding to or subtracting from the speed of the planet gears by controlling the direction of rotation and speed of the input ring gear. The gear and pumps are driven by a constant speed output gear.
B. Differential
(1)
The differential consists of a carrier shaft, two planet gears, and two ring gears - input and output ring gear.
(2)
At any speed and load, a torque is imposed on the output ring gear by the output gear. Input torque is supplied by the input gear turning the carrier shaft. If there were no torque on the input ring gear, it would run freely at whatever speed would allow the output ring gear to stop. Because the ring gear to carrier shaft ratio is 2:1, the speed of the input ring gear at this condition would be double that of the carrier shaft. Since a given output speed is desired, the input ring gear must be constrained.
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