Allison B 400 - WT Hydraulic Schematic - 6 Th Range

Copyright © 1998 General Motors Corp. H–9
WTEC II ELECTRONIC CONTROLS TROUBLESHOOTING MANUAL
APPENDIX H — HYDRAULIC SCHEMATICS
V01128.04
EX
Torque
Converter
CONVERTER IN
CONVERTER OUT
Overdrive
Knockdown
Conv
Flow
LU
N/C
C2
N/O
C4
N/C
FWD
N/C
ON—OFF
C2
Latch
C1 C4
C1
Latch
Cooler
Lube
Filter
Lube
Regulator
Ctl.
Main
Reg.
EX
EX
WT HYDRAULIC SCHEMATIC — 6th RANGE
F B D
G
C4 C5
C3
C2
C1
N/O
C3
N/C
C5
N/C
A C
E
EX
Conv
Regulator
C1
Lockup
Lube
Lube
C3 Pressure
Switch
C5
C3C2
Accumulator/
Relay Valve
MAIN
CONTROL MAIN
EXHAUST
SUCTION
COOLER/LUBE
EX. BACKFILL
CONVERTER
FWD. KDN.
*SOLENOIDS ENERGIZED
CLUTCH APPLIED C2, C4 LOCKUP
LOCKUP
C2
C4
Main
Filter
Pressure Relief
Pump
Sump
Suction
Filter
Main
EX
NOTE: During 5-6 shift, Solenoid G is energized
(both Latch Valves “Down”) to exhaust C3 Clutch
through Solenoid C Regulator Valve.
EFFECTIVE S/N:
MD/B 300/B 400
S/N 6510024410
HD/B 500
ALL S/N
Main
(MD, B 300, and
B 400 models only)
Exhaust
Backfill
Main
Regulator
A D FA D F
Figure H–9. WT Hydraulic Schematic — 6th Range