Allison Transmission AT 1545P Service Manual

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5
Foldout 5. AT 500 Series Transmissions — Hydraulic Schematic
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Forward
Clutch
Fourth
Clutch
Third
Clutch
Second
Clutch
First
Clutch
THIRD CLUTCH PRESSURE
MAIN PRESSURE
FORWARD REGULATOR PRESSURE
DRIVE–2 PRESSURE
FOURTH CLUTCH PRESSURE
FORWARD CLUTCH PRESSURE
AT 540 / 542 / 543 / 545
ORIFICE
3 – 4
Relay Valve
Trimmer
Regulator
Valve
Main Pressure
Regulator Valve
Oil Cooler
ORIFICES
FILTER
SUMP
Oil
Pump
LUBRICATION
MAIN PRESSURE
CONVERTER – OUT
MODULATOR PRESSURE
CONVERTER – IN
BYPASS
ORIFICES
ORIFICE
2 – 3 Shift
Signal Valve
1 – 2 Shift
Signal Valve
3 – 4 Shift
Signal Valve
Manual
Selector
Valve
R
N
1 – 4
1 – 3
1 – 2
1
Priority
Valve
Neutral
Start
Switch
MAIN PRESSURE
FORWARD
CLUTCH
PRESSURE
HOLD FEED
REVERSE
DRIVE–1
PRESSURE
ORIFICE
D1
D2
D3
D4
Governor
Valve
Hold
Regulator
Valve
Modulator
Valve
0.090"
ORIFICE
ORIFICE
FIRST TRIMMER
GOVERNOR PRESSURE
V03030.01
FIRST CLUTCH PRESSURE
Vacuum
Modulator
ORIFICE
TUBE CONNECTION
TUBE CONNECTION
FILTER
SCREEN
TUBE CONNECTION
2 – 3
Relay Valve
1 – 2
Relay Valve
ORIFICE
REVERSE
FIRST FEED
ORIFICE
ORIFICE
ORIFICE
CLUTCH FEED
1st Clutch
Trimmer Valve
Trim Boost
Accumulator
ORIFICE
3rd Clutch
Trimmer Valve
2nd Clutch
Trimmer Valve
ORIFICE
4th Clutch
Trimmer Valve
ORIFICE
ORIFICE
FIRST TRIMMER
Reverse
Signal Switch
REVERSE
MAIN PRESSURE
CONVERTER–IN
CONVERTER–OUT
LUBRICATION
EXHAUST OR SUMP
GOVERNOR PRESSURE
MODULATOR PRESSURE
NEUTRAL, FORWARD REGULATOR
FIRST CLUTCH PRESSURE
TRIMMER REGULATOR PRESSURE
Main
Pressure
Tap
SECOND CLUTCH PRESSURE
DRIVE–3 PRESSURE
FIRST CLUTCH PRESSURE
BYPASS
To
Engine
Vacuum
DRIVE–2 PRESSURE
Manual
Selector
Valve
R
N
1 – 4
2nd N (Park)
1 – 3
1 – 2
1
Neutral
Start
Switch
FORWARD
CLUTCH
PRESSURE
HOLD FEED
REVERSE
ORIFICE
D1
D2
D3
D4

Allison Transmission AT 1545P Specifications

General

Brand	Allison Transmission
Model	AT 1545P
Category	Microphone system
Language	English