Fan Drive Clutch - Lincoln Continental 1964 Shop Manual

(241)
PART
11-4
11-9
FAN DRIVE CLUTCH
Section
Page Section Page
1 Description and Operation
......... 11-9
2 Removal and Installation .................. 11-9
a
DESCRIPTION AND OPERATION
Air-conditioner-equipped vehicles
contain a fan drive clutch assembly,
a six-bladed fan, a compressor drive
pulley, and a compressor clutch
drive belt.
The six-bladed fan is mounted at
the rear of the fan drive clutch. The
clutch assembly and compressor
drive pulley are secured to the water
pump drive pulley with four cap-
screws.
The fan drive clutch and fan as-
sembly is regulated by underhood
temperatures to control the fan rpm
as engine cooling requirements
change. The unit also increases us-
able engine horsepower during high
speed operation.
The fan drive clutch is controlled
by a heat-sensitive, bi-metal spring
located on the clutch front cover. As
underhood temperatures increase,
this spring expands, causing a plate
within the unit to uncover an open-
ing between the oil reservoir and
drive chambers. Centrifugal force
of the drive chamber, as it revolves
at water pump pulley speed, causes
the fluid to enter the drive chamber.
Lands and grooves in the drive plat1e
EJ
REMOVAL AND INSTALLATION
The fan drive clutch assembly is
serviced only as a unit. If malfunc-
tion occurs, the unit must be re-
placed.
REMOVAL
1. Disconnect the ground cable at
t~e battery.
1
2. Loosen the compressor support
bracket bolts and adjusting bracket
bolts. Move the compressor inward
toward the engine. Remove the com-
pressor drive belt.
3. Remove the four bolts securing
the fan drive clutch and compressor
drive pulley to the water pump pul-
ley. Remove the fan drive clutch, fan
and pulley as a unit.
4. Remove the four capscrews and
disassemble the fan from the fan
drive clutch.
CLEANING AND INSPECTION
Refer to Part 11-1, Section 4 for
the cleaning and inspection proce-
dures.
INSTALLATION
1. Install the fan on the fan drive
clutch and tighten the capscrews.
located within the chamber cause
sufficient friction buildup to rotate
the housing and mounted fan. Con-
versely, a decrease in underhood
temperatures allows the heat-sensi-
tive spring to close the valve and
permits the return of the oil to the
reservoir section of the unit. As the
drive chamber empties, the drive
plate rotates freely and the fan no
longer receives torque from the en-
gine. The unit permits slippage so
that some fan rotation will be ex-
perienced, even under low tem-
perature operation.
2. Install the clutch assembly and
compressor drive pulley on the water
pump pulley and tighten the mount-
ing bolts.
3. Install the compressor drive
belt on the compressor clutch and
the drive pulley. Adjust the compres-
sor to obtain the specified belt ten-
sion and tighten the compressor to
mounting bracket attaching bolts.
Tighten the support bracket bolts:
4. Connect the ground cable to
the battery. Remove the fender cov-
ers and close the hood.