Spindle, and Shaft Balancer Assembly:
1. Place the Washer on the Spindle shaft with the curve of
the Washer facing up so that the outside diameter of the
Washer will contact the outer diameter of the Bearing.
Place the Dust Shield onto the Spindle shaft. Place
the Spacer onto the shoulder of the Spindle. Note: Be
sure that the Dust Shield is past the shoulder where
Spacer rests. Place the Bearing on the Spindle with the
seal side toward the Washer. Press onto Spindle using
seated at bottom.
2. When the Spindle Assembly is done correctly, the Bear-
ing will rotate freely but not loosely.
3. Take the new Filter and center it on the small bore that
the original Filter was in before removal. With a small
Place the Valve into the bore so it is oriented correctly,
the bottom of the Bearing bore.
4. Apply a pin head size drop of #271 Loctite® or equiva-
lent to the outside diameter of each of the bearings on
the spindle assembly. Spread the drop of bearing locker
around the bearing until distributed evenly. CAUTION:
Only a very small amount of bearing locker is needed
to prevent rotation of the bearing OD. Any excess will
-
sembly into the bore of the Shaft Balancer and secure
with the Retaining Ring. CAUTION: Make sure that the
Retaining Ring is completely snapped into the groove in
the Balancer Shaft. Allow the adhesive to cure.
Motor Assembly:
1. Place the Dust Shield onto the shaft of the Shaft Bal-
ancer.
2. Use the larger end of the T-13 Bearing Press Sleeve to
press the front Bearing (with 2 Shields) onto the shaft of
the Shaft Balancer.
3. Slide the Front Endplate with the bearing pocket facing
down onto the Motor Shaft. Gently press the Front End-
plate onto the Bearing using the larger end of the T-13
Bearing Press Sleeve until the Front Bearing is seated
in the bearing pocket of the Endplate. CAUTION: Only
press just enough to seat the bearing into the pocket.
Over-pressing can damage the bearing.
4. Place the Key into the groove on the Shaft Balancer.
Place the Rotor on the Shaft Balancer, making sure that
5.
place them in the slots of the Rotor. Place the Cylinder
Assembly over the Rotor with the short end of the
Spring Pin engaging the blind hole in the Front End-
plate. NOTE: The Spring Pin must project .060 in. (1.5
6.
Endplate with the T-1B Bearing Press Tool. Make sure
the T-1B Press Tool is centered on the O.D. of the outer
Assembly over the Shaft Balancer using the small end
of the T-13 Bearing Press Sleeve. The sleeve should
press only the inner race of the bearing. IMPORTANT:
The Rear Endplate and Bearing Assembly is pressed
correctly when the Cylinder is squeezed just enough
between the Endplates to stop it from moving freely
under its own weight when the shaft is held horizontal,
but be able to slide between the Endplates with a very
light force. If the assembly is pressed to tightly the
motor will not run freely. If the pressed assembly is to
loose, the motor will not turn freely after assembly in the
Housing. Secure the assembly by placing the Retaining
Ring in the groove of the Shaft Balancer. CAUTION: The
Retaining Ring must be placed so that the middle and
center portions must be securely “snapped” into the
groove in the Shaft Balancer by pushing on the curved
portions with a small screwdriver.
7. Lightly grease the O-Ring and place in the air inlet of the
Cylinder Assembly.
8. Lightly grease or oil the inside diameter of the Housing,
line up the Spring Pin with the marking on the Housing
and slide the Motor Assembly into the Housing. Make
sure the Spring Pin engages the pocket in Housing.
9. Carefully screw the Lock Ring into the Housing with the
T-6 Motor Lock Ring Wrench/Spindle Puller Tool. Torque
to 60 in/lbs (6.77 Nm.) NOTE: A simple technique to
counter clockwise with the T-6 Motor Lock Ring Wrench/
Spindle Puller while applying light pressure. You will
hear and feel a click when the lead thread of the lock
ring drops into the lead thread of the housing.
10. Spin on a new Pad and hand tighten it using a 24 mm
Pad Wrench.
Testing:
Place 3 drops of quality pneumatic air tool oil directly into
the motor inlet and connect it to a 90 psig (6.2 bar) air
supply. A 12,000 RPM tool should run between 11,500 to
12,500 RPM when the air pressure is 90 psig (6.2 bar) at
the inlet of the tool while the tool is running at free speed.
This free speed will be about 500 RPM to 1,000 RPM less
when a Vacuum or Hook Face Pad is used because of wind
resistance. This will not affect performance when sanding.
Loctite® is a registered trademark of the Loctite Corp.
DOC 0004-SP
11
Revision 06/18/14
