7
2. Support the pulley on the bracket side in such a manner
that the support will not interfere with the removal of the
roller bearing (15). Use a pressing tool of adequate
diameter to engage the outer race of the ball bearing.
Press out both ball bearings (15) and the spacer (18).
The bearings will be damaged after this point of
disassembly and must be replaced.
3. Remove the three isolators (8) from the bosses of the
pulley. They may require turning and at the same pulling
until they disengage from their seats.
FAN PLATE DISASSEMBLY
1. Support the fan mounting surface of the fan plate
assembly making certain sufficient space is left beneath
to permit the ball bearings(11) to be pressed out. Use a
pressing tool of adequate diameter to contact the outer
race of the ball bearing, press out both ball bearings
(11) and the spacer (10). The bearing must be replaced
once removed.
CLEAN & INSPECT
1. Prior to assembly, wash all metal parts thoroughly using
a quality commercial solvent (such as mineral spirits).
2. Inspect all component parts for wear or damage and
replace any parts that fail this visual inspection.
ASSEMBLY (REFER TO FIGURE 9)
PULLEY ASSEMBLY
1. Support the pulley drive end down and using the same
pressing tool as used in the disassembly procedure,
press one of the two ball bearings (15) into the pulley
until it contacts the lip on the pulley housing. (Do not
use a force greater than 1,100 lbs.)
2. Install the spacer (18) into the housing making it as
concentric as possible to the inner race of the bearing
installed in Step 1.
3. Install the second ball bearing (15) into the housing and
using the pressing tool, press until contact has been
made on the spacer. (Do not use a force greater than
1,100 lbs.) Do not continue pressing the bearing once
the inner race has touched the spacer or severe damage
to the bearings may result. As a check after assembly,
the bearing spacer should be in contact with the inner
races of each ball bearing but able to be moved by a
finger load.
4. Install the three isolators (8) onto their seats on the pulley
making certain they are fully seated.
ASSEMBLY OF PULLEY ONTO THE BRACKET AND
SHAFT
1. Support the bracket with the shaft pointing up. Apply
one band of Loctite RC609 around the shaft at the location
of inner races of the bearings (15) in the pulley. Also put
a band of the Loctite on the inner races of the bearings
(15). NOTE: Parts MUST BE free of oil and grease for
Loctite to properly bond.
2. Slide the pulley onto the shaft, making sure the bottom
bearings inner race contacts the bracket.
3. Place lockwasher (17) on the shaft engaging the I.D.
tab in the slot in the shaft and install hexnut (16) using
the same tool as Step 7 of “Disassembly.” Torque hexnut
to 80-130 ft. lbs. until two of the tangs of the lockwashers
(17) can be bent up against the flats of the locknut.
Never back the torque off to align parts. Allow 24 hours
for complete curing of the Loctite to take affect.
ASSEMBLY OF FAN PLATE
1. Place the fan plate face up on a level surface and with
the pressing tool used in disassembly procedure, press
one of the ball bearings (11) into the housing until it
contacts the lip of the bore. (Do not use a force greater
than 700 lbs)
2. Install spacer(10) into the bore of the fan plate (as
illustrated in Figure 1) concentric with the inner race of
the ball bearing previously installed. (NOTE: Flanged
end of spacer (10) should be toward the forward nose
of the fan plate.)
3. Install the second ball bearing (11) into the bore of the
fan plate and utilizing the pressing tool used in Step 1,
press the ball bearing until it contacts the spacer (10).
(Do not use a force greater than 700 lbs.) Do not
continue pressing the bearing once the inner race has
touched the spacer, severe damage to the bearings
may result. As a check after assembly, the bearing
spacer should be in contact with the inner races of
each ball bearing but able to be moved by a finger load.
FINAL ASSEMBLY
1. Support the bracket, shaft and pulley assembly with the
shaft pointing up.
2. Install the six springs (7) on the pulley. Three into the
isolators (8) and three onto the bosses provided. NOTE:
The isolators must be equally spaced around the
circumference of the pulley (every other spring).
3. Apply a thin film of silicone lubricant BW-665M to the
three o-rings (2-3-4). Install o-ring (2 & 4) onto the shaft
and o-ring (3) into the groove of the piston (14).
4. Install the pressure plate (6) on the pulley assembly
making sure the bosses on the underside of the plate
mate with the O.D. of the six springs (7) previously
installed on the pulley assembly.
5. Lubricate the I.D. of the piston housing (13) with the
same lubricant used on the o-rings in Step 3. Install the
piston (4) (with o-ring (3) in place) into the piston housing.
Install the piston and housing assembly onto the shaft,
making sure the flats on the I.D. of the piston mate with
the flats on the shaft.
