5
B. If the fan clutch installation has successfully passed
this test before, but does not do so now, the
thermostatic control valve is defective and should be
replaced.
4. With the clutch in the engaged position (control air
vented), check the condition of the drive pins and mating
holes in the pressure plate by attempting to rotate the
fan clockwise and counterclockwise. If free play exceeds
5/16” (8 MM), fan clutch must be repaired or replaced.
LEAKAGE CHECKS
In order to check for air leakage past the only two sliding
o-rings in the FD-3
™
TorqueMaster fan clutch it is necessary
to disconnect the single air control line.
Check for leakage by connecting a 90 cu. in. reservoir (Bendix
part number 225000) with a gauge installed to the control
port of the fan clutch. After filling the 90 cu. in. reservoir with
100 psi, allow the pressure to stabilized and observe the
time required for the reservoir pressure to drop to 90 psi. If
the time required is less than 1 minute, leakage is excessive
and repair or replacement is necessary.
WARNING! PLEASE READ AND FOLLOW
THESE INSTRUCTIONS TO
AVOID
PERSONAL INJURY OR DEATH:
When working on or around a vehicle, the following
general precautions should be observed at all times.
1.
Park the vehicle on a level surface, apply the
parking brakes, and always block the wheels.
Always wear safety glasses.
2.
Stop the engine and remove ignition key when
working under or around the vehicle. When
working in the engine compartment, the engine
should be shut off and the ignition key should be
removed. Where circumstances require that the
engine be in operation, EXTREME CAUTION should
be used to prevent personal injury resulting from
contact with moving, rotating, leaking, heated or
electrically charged components.
3.
Do not attempt to install, remove, disassemble or
assemble a component until you have read and
thoroughly understand the recommended
procedures. Use only the proper tools and observe
all precautions pertaining to use of those tools.
4.
If the work is being performed on the vehicle’s air
brake system, or any auxiliary pressurized air
systems, make certain to drain the air pressure from
all reservoirs before beginning ANY work on the
vehicle. If the vehicle is equipped with an AD-IS
™
air dryer system or a dryer reservoir module, be
sure to drain the purge reservoir.
5.
Following the vehicle manufacturer’s
recommended procedures, deactivate the electrical
system in a manner that safely removes all
electrical power from the vehicle.
6.
Never exceed manufacturer’s recommended
pressures.
7.
Never connect or disconnect a hose or line
containing pressure; it may whip. Never remove a
component or plug unless you are certain all
system pressure has been depleted.
8.
Use only genuine Bendix
®
replacement parts,
components and kits. Replacement hardware,
tubing, hose, fittings, etc. must be of equivalent
size, type and strength as original equipment and
be designed specifically for such applications and
systems.
9.
Components with stripped threads or damaged
parts should be replaced rather than repaired. Do
not attempt repairs requiring machining or welding
unless specifically stated and approved by the
vehicle and component manufacturer.
10. Prior to returning the vehicle to service, make
certain all components and systems are restored
to their proper operating condition.
REMOVAL
It is recommended that the FD-3
™
TorqueMaster fan clutch
be removed from the vehicle for service even though it is
possible on some installations to install kits 104937 and
104938 without clutch removal.
1. Secure the vehicle on a level surface by means other
than the brakes.
2. Drain ALL reservoirs to 0 psi (0 kPa) air pressure.
3. Disconnect the air line from the fan clutch.
4. Remove the six cap screws and lockwashers that attach
the vehicle’s fan to the fan plate of the FD-3
™
TorqueMaster.
5. Remove the fan. NOTE: Remove and retain any spacers
that may be installed between fan and fan plate
assembly.
6. Loosen, remove and retain the vehicle’s fan belts.
7. Remove the attaching hardware from the fan clutch
mounting bracket and remove the fan clutch from the
vehicle.
DISASSEMBLY (Refer to Figure 9)
1. Remove the dust cap(1) by pulling it off of the end of the
shaft.
2. Remove the cotter pin(2) from the lock nut (10).
3. Remove the locknut(10).
4. Remove the fan plate assembly and set aside.
5. Slide the piston housing(15) and piston(16) off the shaft.
6. Separate the piston(16) from the piston housing (15) and
remove the o-rings(4 & 5) from the piston.
7. Remove o-ring(3) from the shaft.
8. Remove pressure plate(7) from the shaft. Remove the
four o-rings(6) from the drive pin holes in the pressure
plate.
9. Remove the two 1/4”x20 Phillips head screws that secure
the spring pack(9) to the pulley. Remove the spring pack.
10. Remove the anti-rotation spring(17).
11. Using a drift punch, disengage the locktab of the
lockwasher(23) from the notch of the locknut(18).