MIRKA ROS525NV Notice D'utilisation page 11

3. Take the new (14) Filter and center it on the small bore
that the original Filter was in before removal. With a small
diameter screwdriver or flat-ended rod, press the (14) Filter
into the bore until it is flat in the bottom of the bore. Place the
(15) Valve into the bore so it is oriented correctly, then press
the (16) Retainer into the bore until it is flush with the bottom
of the Bearing bore.
4. 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 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 make future removal
difficult. Place the (22) Spindle Assembly into the bore of
the (13) 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 (61) Dust Shield onto the shaft of the (13) Shaft
Balancer.
2. Use the larger end of the (MPA0494) T-13 Bearing Press
Sleeve to press the (10) front 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 (9) Front
Endplate onto the (10) Bearing using the larger end of the
T-13 Bearing Press Sleeve until the Front Bearing is seated
in the bearing pocket of the (9) Front Endplate. CAUTION:
Only press just enough to seat the bearing into the pocket.
Over-pressing can damage the bearing.
4. Place the (8) Key into the groove on the (13) Shaft Balancer.
Place the (6) Rotor on the (13) Shaft Balancer, making sure
that it is a tight slip fit.
5. Oil the five (7) Vanes with a quality pneumatic tool oil and
place them in the slots of the (6) Rotor. Place the (4) Cylinder
Assembly over the (6) Rotor with the short end of the Spring
Pin engaging the blind hole in the (9) Front Endplate.
6. Press fit the (2) rear Bearing (2 shields) into the (3) Rear
Endplate with the (MPA0195) T-1B Bearing Press Tool. Make
sure the T-1B Press Tool is centered on the O.D. of the outer
race. Lightly press fit the (3) Rear Endplate and Bearing
Assembly over the (13) 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
DOC A0348
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 (1) Retaining
Ring in the groove of the (13) 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 (27) Housing,
line up the Spring Pin with the marking on the (27) 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 (27) Housing
with the (MPA0025) T-6 Motor Lock Ring Wrench/Spindle
Puller Tool. Torque to 6.77 Nm (60 in/lbs). 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. Spin on a new (36) Pad and hand tighten it using a 24 mm
Pad Wrench.
Testing:
Place 3 drops of quality pneumatic air tool oil directly into the mo-
tor inlet and connect it to a 6.2 bar (90 psig) air supply. A 12,000
RPM tool should run between 11,500 to 12,500 RPM when the
air pressure is 6.2 bar (90 psig) 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.
10
Rev 01/14/14