WD Catalog 2018

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11-2
Chapter 11 – Typical AC Systems and Components
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BLOWER MOTOR
BLOWER
WHEEL
WARM AIR OUTLET
HEATER
CORE
AIR CONTROL
KNOB
CORE HOUSING
BLOWER PLENUM
ASSEMBLY
DEFROSTER OUTLET
EXPANSION VALVE
HIGH PRESSURE LINE
RECEIVER-
DRIER
PLUMBING SCHEMATIC
LIQUID LINE
COMPRESSOR
CLUTCH ASSEMBLY
SUCTION LINE
HIGH PRESSURE
LINE
TO ROOFTOP OR
FRONT MOUNTED
CONDENSER
Figure 11-2
A universal heater defroster
unit.
UNIVERSAL HEATER/
DEFROSTER
UNIVERSAL IN–CAB
ROOF MOUNTED AIR
CONDITIONER UNIT
Figure 11-3
A universal in-cab roof
mounted air conditioner.
The compressor clutch and
condenser would probably
be mounted under the hood
or cab (cab over). Refrigera-
tion hoses would be long
compared to in-dash
mounted units. System
controls are easily acces-
sible for the driver. This
system is usually found on
off-road vehicles.