1
®
Bendix
®
FD-2
™
Clutch Type Fan Drive
SD-09-8503
FIGURE 1
FIGURE 2
DESCRIPTION
The Bendix
®
FD-2
™
fan clutch is an air operated thermostat
controlled clutch for the engine cooling fan. Its purpose is
to maintain engine temperature by engaging or disengaging
the cooling fan, thereby providing better fuel economy,
greater engine efficiency, faster warm-ups, and a quieter
vehicle.
The FD-2
™
fan clutch is produced in several different models
to accommodate the variety of installation requirements
resulting from the many engine, vehicle and accessory
combinations. Its fail-safe design prevents overheating in
the event of air loss for any cause.
OPERATION
GENERAL
The FD-2
™
fan clutch replaces the standard fan hubs on the
engine and interchanges with other Bendix and competitive
fan clutches. It is controlled by a temperature sensitive air
valve (see Figure 5). The same valves used to control radiator
shutters are used to control the FD-2
™
fan clutch. Installed
in the engine block, the control valve directly senses coolant
temperature. Provided coolant temperature remains below
the setting of the valve, air passes through it to disengage
the fan clutch. When coolant temperature rises to the valve
setting, the valve closes and exhausts air pressure from the
fan clutch which engages the fan.
PRESSURE PLATE
BEARINGS
BRACKET
SHAFT
PISTON
DRIVE PIN
DUST
CAP
LOCK
NUT
FAN HUB
RETURN SPRING
PULLEY
AIR INLET
BEARINGS
PISTON HOUSING
