MIRKA AOS130-B Manual De Instrucciones página 57

bearings until distributed evenly. Caution: Only a very small
amount of bearing locker is needed to prevent rotation of the
bearing OD. Any excess will make future removal difficult.
Place the Spindle Assembly into the bore of the (13) Shaft
Balancer and secure with the (23) 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 (71) Dust Shield onto the shaft of the (13) Shaft
Balancer.
2. Use the larger end of the (MPA0494) T-13 Bearing Press
Sleeve (not shown) to press the front (10) Bearing (with 2
Shields) onto the shaft of the (13) Shaft Balancer.
3. Slide the (9) Front Endplate with the bearing pocket facing
down onto the motor shaft. Gently press the Front Endplate
onto the (10) Bearing using the larger end of the (MPA0494)
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-press-
ing can damage the bearing.
4. Place the (8) Key into the groove on the (13) Shaft Balancer.
Place the (6) Rotor on the Shaft Balancer, making sure that it
is a tight slip fit.
5. Oil the (7) Vanes with a quality pneumatic tool oil and place
them in the slots in the Rotor. Place the (5) Cylinder As-
sembly over the Rotor with the short end of the Spring Pin
engaging the blind hole in the (9) Front Endplate. Note: The
Spring Pin must project 1.5 mm (0.060 in.) above the flanged
side of the Cylinder.
6. Press fit the rear (2) Bearing (2 shields) into the (3) Rear
Endplate with the (MPA0195) T-1B Bearing Press Tool Top
(not shown). Make sure the T 1B Press Tool is centered on
the O.D. of the outer race. Lightly press fit the Rear Endplate
and Bearing over the (13) Shaft Balancer using the small end
of the (MPA0494) T-13 Bearing Press Sleeve (not shown).
The sleeve should only press on the inner race of the bear-
ing. IMPORTANT: The Rear Endplate and bearing assembly
is pressed correctly when the (4) 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
should still be able to slide between the Endplates with a very
light force. If the assembly is pressed too tightly, the motor
will not run freely. If the pressed assembly is too loose, the
motor will not turn freely after assembly in the (33) Housing.
Secure the assembly by placing the (1) Retaining Ring in the
groove of the Shaft Balancer. CAUTION: The Retaining Ring
must be placed so that the middle and two ends of the hoop
touch the Bearing first. 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.
7. Lightly grease the (5) O-Ring and place in the air inlet of the
(4) Cylinder Assembly.
8. Lightly grease or oil the inside diameter of the (33) Housing,
DOC 0745
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 (12) Lock Ring into the (33) Housing with
the (MPA0025) T-6 Motor Lock Ring Wrench/Spindle Puller
Tool. See "Parts Page" for torque settings. Note: A simple
technique to assure first thread engagement is to turn the
Lock Ring 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. Place one of the (39) Mini Pad Support Assemblies into the
(33) Housing with the 45 degree chamfer of the base facing
outward away from the center of the machine and the arc
in the base of the pad support facing toward the center of
the machine. Screw tight with the two (31) Screws and (32)
Washers using the (45) 2.5 mm Hex Wrench. Repeat for
second pad support. See "Parts Page" for torque settings.
11. Using a straight edge placed across both bottom surfaces of
the (39) Mini Pad Support Assemblies, measure the distance
from the surface of the (24) Spindle Assembly to the straight
edge. There should be approximately 0.25 mm (0.010 in.)
of space, if not, add supplied (25 or 26) Spacers in the combi-
nation that most closely results in 0.25 mm (0.010 in.) of
spacing. Note: Spindle face must be slightly below Mini Pad
Supports for best function. Do not over-shim. Apply a small
amount of anti-seize compound in the 5-90° countersunk
holes of the (41) Pad Backing before assembly. Place the
Pad Backing by orientating the Shims with the screw holes
and placing the Pad Backing down onto the Spindle As-
sembly making sure the Pin goes through the Pad Backing.
Add the (43) Screw. See "Parts Page" for torque settings. In a
circular rotation, insert the (42) Screws into the Pad Backing
and Mini Pad Support Assemblies but leave them slightly
loose until all are in place, and then tighten firmly using the
(45) 2.5 mm Hex Wrench. See "Parts Page" for torque set-
tings.
12. Attach a new (44) Pad on the (41) Pad Backing with the four
(42) Screws using the (45) 2.5 mm Hex Wrench. See "Parts
Page" for torque settings.
Testing:
Place 3 drops of quality pneumatic air tool oil directly into the
motor inlet and connect to a 6.2 Bar (90 psig) air supply. The tool
should run between 9,500 and 10,500 Orbits per Minute when the
air pressure is 6.2 Bar (90 psig) at the inlet of the tool while the
tool is running at free speed.
* LOCTITE® is a registered trademark of the Loctite Corp.
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Rev 12/01/14