Page 89 - Hydra-matic 6 Speed RWD Technician's Guide (October 2005)

64B
2

plates.
exhausted.
2c 2-6 Clutch:

1d 3-5 Reverse Clutch:
2-6 CLUTCH RELEASES

2b 2-6 Clutch Regulator Valve:
3-5 REVERSE CLUTCH APPLIES
Page 88
(full line pressure) to the clutch.
1b 3-5 Reverse Clutch Boost Valve:
the valve allowing the switch to close.
2a CB26 Pressure Control Solenoid 4:
3 and opens the normally-closed switch.
1c 3-5 Reverse Clutch Regulator Valve:
COMPLETE HYDRAULIC CIRCUIT
and then to the 3-5 reverse clutch boost valve.
valve and enter the exhaust backfill fluid circuit.
CLUTCH
SPRAG
backfill pressure relief valve where excess pressure is
35 reverse clutch fluid enters the 1-2-3-4 & 3-5 reverse clutch
housing to move the piston against spring force combined with
regulator valve against 3-5 reverse clutch regulator valve spring
The CB26 pressure control solenoid 4 is commanded OFF
force from the compensator to apply the 3-5 reverse clutch
valve 2. When the 3-5 reverse clutch regulator valve is in this
clutch regulator valve passes through the valve and enters the
valve to exhaust. 26 clutch/1234 clutch feed fluid at the 2-6
full feed position sending full 35 reverse clutch feed pressure
results in the 3-5 reverse clutch regulator valve moving to the
allowing PCS 26 clutch fluid from the 2-6 clutch regulator
from the center support. 26 clutch fluid is routed through the
the 2-6 clutch plates and forces 26 clutch fluid to exhaust
PCS 35 reverse clutch fluid moves the 3-5 reverse clutch
allow 26 clutch fluid from the 2-6 clutch to pass through the
2-6 clutch regulator valve spring force moves the valve to
PS3 fluid circuit. PS3 fluid is then routed to pressure switch
reverse feed to pass through the valve and enter the 3-5 reverse
2-6 clutch spring force moves the 2-6 clutch piston to release
force and 35 reverse clutch feedback fluid. This allows 35
clutch circuit. 35 reverse clutch fluid is then routed to the 3-5
reverse clutch, the 3-5 reverse boost valve and the clutch select
2-6 clutch regulator valve where it enters the exhaust backfill
PCS 35 reverse clutch fluid is also routed through orifice #40
passes through the valve and enters the 35 reverse clutch
feedback circuit. As PCS 35 reverse clutch fluid pressure is
PCS 35 reverse clutch fluid pressure acts on a differential
fluid circuit and is routed through orifice #30 to the exhaust
increased to a given value, the 3-5 reverse clutch boost valve
position, PS1 fluid from the pressure switch 1 exhausts through
opens the 35 reverse clutch feedback circuit to exhaust. This
5 reverse clutch boost valve spring. 35 reverse clutch fluid
area moving the 3-5 reverse clutch boost valve against the 3-
N.L.
C35R
N.L.
N.L.
N.H.
LINE
C1234
CB26
N.H.
N.C.
TCC
ON
SOL 1
N.C.
SHIFT
SOL 2
CONTROL
CONTROL
CONTROL
PRESSURE
CONTROL
SOLENOID
CONTROL
CONTROL
CBR1/C456
PRESSURE
1a
ON
PRESSURE
ON
N.H. OFF
OFF
OFF
PRESSURE
SOLENOID
SOLENOID 2
SOLENOID 5
PRESSURE
PRESSURE
2a
SOLENOID 3
SOLENOID 4
SOLENOID
ACT FD LIM orifice #48 and then to the 3-5 reverse clutch regulator valve. OFF SOL 1 fluid circuit. PCS 35 reverse clutch fluid is routed through SHIFT 5 allowing actuator feed fluid to enter the PCS 35 reverse clutch N.C. The C35R pressure control solenoid 2 is commanded ON 1a C35R Pressure Control Solenoid 2: VALVE ASSEMBLY 1 CONTROL 3-5 clutch apply. C35R pressure control solenoid 2 is also commanded ON to regulate normally-low CB26 pressure control solenoid 4. At the same time the sensors
PCS TCC
1
3
N.C.
N.C.
PS5
PS3
PS1
PCS LINE ACT FD LIM SOL 2 ACT FD LIM ACT FD LIM COMP FEED
ACT FD LIM
ACT FD LIM
ACT FD LIM ACT FD LIM LINE
PCS 1234 CL
PCS CBR1/456 CL PCS TCC CLUTCH REVERSE 3-5
PS3
LINE LINE LINE 35 REV CLUTCH 1234 CLUTCH
COMP FD COMP FD 26 COMP FD 1d
EX BF PCS 26 CL PCS CBR1/456 CL
44
42
EX BACKFILL
EX BACKFILL
36
48
EX 39 PS5 35 REV CLUTCH 1234 CLUTCH COMP FD
ACT FD LIM
SOL 2
35
EX 40 35R CL BOOST VALVE 456 CL 31 EX
SHTL
PCS 35 REV CL
2-6 GAIN
47
EX BF EX BF 30 LINE 456 CL BOOST VALVE EX BF
EX 46 26 CL 2-6 CLUTCH REG 43 CBR1/456 CL FD CBR1/C456 CL REG VALVE 38
34
35R FD PS1 2b
ACT FD LIM 3-5 REV CL REGULATOR VALVE EX PS3 EXHAUST BACKFILL EX
33
EX PRESSURE RELIEF VALVE PS5
PCS 1234 CL
1234 CL DFLT
LINE
PS4 1234 CL EX 35 REV CL FDBK CBR1 FDBK EX ACT FD LIM LINE
EX #7 35 REV CL 1b 26 CL/1234 CL FD CBR1/456 CL FD 37 DRIVE 1-6 ASSEMBLY CLUTCH 4-5-6
COMP FD
26 CL 41
1-2-3-4 CL REGULATOR VALVE
1234 CL FD
35 REV CL 35 REV CLUTCH 456 CLUTCH 2c
45
1c
25
50
1234 CL 1234 CL 1234 CLUTCH
DRIVE 1-6 DRIVE RANGE - 3RD GEAR
#6
26 CL 26 CLUTCH
35R SPL #5 23 #4
32
26 CL/1234 CL FD PS5 26 CLUTCH ASSEMBLY 2-6 CLUTCH
Figure 60
1234 CL FDBK
456 CL 456 CLUTCH
CBR 1
35 CL REV FD
DRIVE 1-6 CBR
ACT FD LIM ASSEMBLY CENTER SUPPORT
1234 CL
12
ACT FEED LIMIT VALVE
LINE
CSV2 LATCH
LINE ASSEMBLY CLUTCH REVERSE LOW &
35 REV CL
#1
LINE
DRIVE 1-6
DRIVE 1-6
COMP FD
REVERSE DRIVE
PCS 1234 CL 1234 CL BOOST VALVE 35 CL REV FD DRV B
DRIVE
29
1234 CL DRIVE BRAKE
1234 CL DFLT
1234 CL FDBK DRV B
REG APPLY
EX EX DRIVE LINE
DRIVE BRAKE
CBR1/456 CL FD
REVERSE EX EX
11
456 CL FD 456 CL FD MANUAL VALVE
456 CL
REVERSE
SOL 2
14
EX 35 CL REV FD CBR EX CLUTCH SELECT VALVE 2
CBR1/CBR FD EX
CLUTCH SELECT VALVE 3
EX CBR1/CBR FD EX
REG APPLY
13
LINE FD REG VALVE COMPENSATOR TCC REGULATOR VALVE SHTL PCS TCC 21 DRIVE 1-6
EX M
COMP FD DRIVE
1234 CL DFLT FD EX D
EX 9 1234 CL DFLT FD N
CSV3 ENABLE
10
SOL 1 20 35 REV CL R
456 CL 22 CSV2 ENABLE P
#3
65