DOC 2881 10 Revision 04/01/13
5. Take the Filter and center it in the small bore that the
original Filter was in before removal. With a small diam-
eter screwdriver or at-ended rod, press the Filter into
the bore until it is at in the bottom of the bore. Place the
Valve into the bore so it is oriented correctly, then press
the Retainer into the bore until it is ush with the bottom
of the spindle bearing bore.
6. Apply a pin head size drop of #271 Loctite® or equivalent
to the outside diameter of each of the bearings on the
Spindle Assembly. Spread the drop of bearing locker
around both bearings until distributed evenly. CAUTION:
Only a very small amount of bearing locker is needed
to prevent rotation of the bearing OD. Any access will
make future removal difcult. Place the Spindle Assembly
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 Shaft
Balancer shaft. Allow the adhesive to cure.
Motor Assembly:
1. Place the Front Bearing Dust Shield onto the shaft of the
Shaft Balancer.
2. Lightly grease the O-Ring with a light mineral grease and
place it in the groove of the Lock Ring, then place it on
the Shaft Balancer with the O-Ring facing towards the
small end of the Shaft Balancer.
3. 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.
4. Slide the Front Endplate with the bearing pocket facing
down onto the Shaft Balancer. Gently press the Front
Endplate 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 Front Endplate.
CAUTION: Only press just enough to seat the Bearing
into the pocket. Over-pressing can damage the Bearing.
5. Place the Key into the groove on the Shaft Balancer.
Place the Rotor onto the shaft of the Shaft Balancer,
mak-ing sure that it is a tight slip t.
6. Oil the ve Vanes with a quality pneumatic tool oil and
place in the slots in the Rotor. Place the Cylinder As-
sembly over the Rotor with the shorter end of the Spring
Pin engaging the blind hole in the Front Endplate.
NOTE: The Spring Pin must project .060 in. (1.5 mm)
above the anged side of the Cylinder.
7. Press t the Bearing (2 shields) into the Rear Endplate
with the T-1B Bearing Press Tool. Make sure the T-1B
Press Tool is centered on the O.D. of the outer race.
Lightly press t the Rear Endplate and Bearing 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 is pressed correctly when the Cylinder is
squeezed just enough between the End plates to stop it
from moving freely under its own weight when the Shaft
Balancer 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. CAUTION: If the
Rear Endplate assembly is “over-pressed” damage to
the Front and Rear Endplate Bearings may result.
8. Secure the assembly by placing the Retaining Ring in
the groove of the Shaft Balancer. CAUTION: The Retain-
ing Ring must be placed so that the middle and two ends
of the hoop touch the Bearing rst. Both raised center
portions must be securely “snapped” into the groove in
the Shaft Balancer by pushing on the curved portions
with a small screwdriver.
9. Lightly grease the O-Ring with a light mineral grease and
place in the air inlet of the Cylinder Assembly.
10. 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 Hous-
ing.
11. Carefully screw the Lock Ring with the O-ring facing the
Front Endplate into the Housing with the T-6 Motor Lock
Ring Wrench/Spindle Puller Tool. See the “Parts Page”
for torque settings. NOTE: A simple technique to assure
rst thread engagement is to turn the lock ring counter
clockwise with the service tool while applying light pres-
sure. You will hear and feel a click when the lead thread
of the lock ring drops into the lead thread of the housing,
then turn clockwise to tighten.
12. Place one of the Pad Support Assemblies into the
Housing with the 45 degree chamfer of the base facing
towards the center of the machine. Screw tight with two
Screws and Washers. Repeat for second pad support
using the other two Screws and Washers.
13. Using a straight edge placed across both bottom
surfaces of the Pad Support Assemblies, measure the
distance from the surface of the Spindle Assembly to
the straight edge. There should be approximately .010
in. (0.25 mm) of space, if not, add the supplied Spacers
in the combination that most closely results in .010 in.
(0.25 mm) of spacing. NOTE: The Spindle face must be
slightly below the Pad Supports for the best function.
Do not over spacer. Apply a small amount of anti-seize
compound in the 9-90° counter sunk holes of the Pad
Backing before assembly. Place the Pad Backing by
orientating the Spacer(s) with the screw hole and placing
the pad backing down onto the Spindle Assembly mak-
ing sure the Pin goes through the Pad Backing. Add the
Screw rst and tighten rmly. In a circular rotation, apply
smaller Screws into the Pad Backing and Pad Support
Assemblies but leave them slightly loose until all are in
place, and then tighten rmly.
14. In order for the Pad to be attached to the Pad Backing,
the Pad needs to be at a 15° angle to the Pad Backing
and then turned clockwise until the hooks on the Pad are
locked into the Pad Backing. Tighten the Pad to the Pad
Backing with the four Screws.
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 sup
ply. The tool should run between 9,500 and 10,500 Orbits
per Minute when the air pressure is 90 psig (6.2 Bar) at the
inlet of the tool while the tool is running at free speed.
Loctite® is a registered trademark of the Loctite Corp.
