Volvo 50-42LE transmission. Manual - part 10
S1
"ON"
VIEWED FROM THE
WORM TRACK SIDE
n.c.
STH (epc)
SL
"OFF"
X
X
X
X
X
X
X
X
X
X
X
.039" balance
orifice thru valve
PRESSURE CONTROL
SOLENOID REG. VALVE
MANUAL VALVE
2-3 SHIFT
VALVE
3-4 SHIFT
VALVE
1-2 SHIFT
VALVE
NEUTRAL CONTROL
VALVE (Blocked)
CLUTCH MODULATOR
VALVE
TCC SOLENOID
REGULATOR VALVE
PRESSURE REGULATOR
VALVE
SECONDARY REGULATOR
VALVE
LOCK-UP CONTROL
VALVE
C1 ACCUMULATOR
LOW COAST
MODULATOR
VALVE (B3)
LEGEND
B1 ACCUMULATOR
VALVE
ACCUMULATOR
CONTROL
VALVE
B2 ACCUMULATOR
VALVE
B2
ACCUMULATOR
C2 ACCU-
MULATOR
C2 ACCU-
MULATOR
VALVE
C3 ACCUMULATOR
VALVE
OUTPUT
SUCTION
TCC
RELEASE SIDE
TCC
APPLY SIDE
THE RETURN
LINE IS LOCATED
IN THE FRONT PAN
CLUTCH PACKS
C3
ACCUMULATOR
.038" ORIFICE
.058" CROSS-
DRILLED HOLE
.0
3
0
"
.0
3
0
"
2
2
6
W
1
.0
5
1
"
VOID
C-3
C-3
ATF
COOLER
X
X
B4 BRAKE BAND
"OFF"
B4 SERVO
B4 ACCUMULATOR
PISTON
B
-4
A
-2
.0
3
2
"
.0
8
6
"
.0
4
0
"
.0
3
5
"
.0
3
9
"
.0
4
2
"
**
.0
3
9
"
C
B
3
C
B
6
.0
7
8
"
Rear
lube
Central
lube
Pressure
port
503L
SUMP
X
X
PUMP
TORQUE
CONVERTER
B-1
C
B
1
C
B
2
C
B
8
C
B
9
C
B
1
0
.059"
X
.047"
X
X
COOLER
RELIEF
X
0
. 32"
X
X
X
X
503L
.0
4
0
"
X
X
X
X
.032”
Differential
lube
.0
5
9
”
.
2"
03
B
1
9
B
1
9
n.c.
S2
"OFF"
n.o.
X
X
X
X
X
X
.035" balance
orifice thru valve
P
R N D 3 L
50-42LE
2
4
9
W
2
.0
3
9
"
C
B
4
C
B
5
.0
5
0
"
.0
4
2
"
W
2
W
2
X
X
.039"
.070"
.0
3
9
"
.0
3
9
"
X
X
.0
3
0
"
C
B
7
DRIVE POSITION
3rd GEAR
B3 BRAKE
(LOW/REV. BRAKE)
C2 CLUTCH
(DIRECT CLUTCH)
LEGEND
LINE PRESSURE
EPC PRESSURE
SECONDARY REG.
PRESSURE
TO SUMP
SOLENOID PRESSURE
COOLER PRESSURE
CONNECTED CIRCUIT
W1- W2 SPACER
PLATE DIFFERENCES
** THIS HOLE IS USED ONLY
ON CHECK VALVE VERSIONS
ACCUMULATOR BACK PRESH.
C1 CLUTCH
(FORWARD CLUTCH)
B1 BRAKE
(OVERRUN BRAKE)
B2 BRAKE
(INT. BRAKE)
C3 CLUTCH
(UNDERDRIVE CLUTCH)
.058” ORIFICE