MIRKA ROS2-550NV Notice D'utilisation page 11

shorter end of the spring pin engaging the blind hole in the
(9) Front Endplate. Note: The spring pin must project 1.5
mm (.060 in.) above the flanged side of the Cylinder. Oil the
five (7) Vanes with a quality pneumatic tool oil and place in
the slots in the Rotor. One or two drops of oil should be suf-
ficient.
7. Press fit the rear (2) Bearing (2 shields) into the (3) 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 of the
Bearing. 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. The Sleeve should press only
the inner race of the Bearing. Important: The Rear Endplate
and Bearing 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 motor assembly
is held horizontal, but be able to slide between the Endplates
with a very light force. If pressed too tightly the motor will not
run freely. If the pressed assembly is to loose, the motor will
not turn freely after assembly in the (33) Motor Housing.
8. 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 (2) 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.
9. Lightly grease the (5) O-Ring and place in the air inlet of the
(4) Cylinder Assembly.
DOC A1983
10. Lightly grease or oil the inside diameter of the (33) Motor
Housing, line up the spring pin of the (4) Cylinder Assembly
with the marking on the Motor Housing and slide the Motor
Assembly into the Motor Housing. Make sure the Spring
Pin engages the pocket in the Motor Housing. Carefully
screw the (12) Lock Ring into the Motor Housing with the
(MPA0025) T-6 Motor Lock Ring Wrench/Spindle Puller Tool.
Torque settings to be 6.2-7.3 N-m (55-65 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.
11. Spin on a new (24) Pad and hand-tighten it using the (23)
Pad Wrench.
Testing:
Place 3 drops of quality pneumatic air tool oil directly into the
motor inlet and connect the machine 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.
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Rev 11/14/11