Motor Assembly - MIRKA ROP2 Manual De Instrucciones

ing locker around the Bearings until it is distributed
evenly. Caution: Only a very small amount of bear-
ing locker is needed to prevent rotation of the bear-
ing OD. Any excess will make future removal difficult.
Place the Spindle Assembly into the bore of the (13)
Shaft Balancer and secure with the (22) Retaining
Ring. Caution: Make sure that the Retaining Ring is
completely snapped into the groove in the Shaft Bal-
ancer. Allow the adhesive to cure.

Motor Assembly:

1. Place the (62) Dust Shield onto the shaft of the (13)
Shaft Balancer.
2. Lightly grease the (11) O-Ring with a light mineral
grease and place it in the groove of the (12) Lock
Ring, then place it on the (13) Shaft Balancer with the
O-Ring facing towards the keyway.
3. Use the larger end of the T-13 Bearing Press Sleeve
to press the front (10) Bearing (with 2 shields) onto
the shaft of the (13) Shaft Balancer.
4. 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 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 two (6) Keys into the grooves of the (13)
Shaft Balancer. Place the (4) Rotor on the shaft of
the (13) Shaft Balancer, making sure that it is a light
slip-fit.
6. Place the (8) Cylinder Assembly over the (4) Rotor
with the shorter end of the spring pin engaging the
blind hole in the Front Endplate. Note: The spring
pin must project 1.5 mm (0.060 in.) above the flanged
side of the Cylinder. Oil the five (5) Vanes with a qual-
ity pneumatic tool oil and place in the slots in the Ro-
tor. One or two drops of oil should be sufficient.
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 T-13 Bearing
Press Sleeve. The Sleeve should only press on
the inner race of the Bearing. Important: The Rear
Endplate and Bearing is pressed correctly when the
(8) 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 should still be able to slide between the Endplates
DOC A2301
52
with a very light force. If pressed to tightly the mo-
tor will not run freely. If the pressed assembly is too
loose, the motor will not turn freely after assembly in
the Motor Housing.
8. Secure the assembly by placing the (1) Retaining
Ring in the groove of the (13) Shaft Balancer. Cau-
tion: The Retaining Ring must be placed so that the
middle and two ends of the hoop touch the (2) Bear-
ing 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 screw-
driver.
9. Lightly grease the (7) O-Ring and place in the air inlet
of the (8) Cylinder Assembly.
10. Lightly grease or oil the inside diameter of the (32)
Motor Housing, line up the spring pin of the (8) Cylin-
der Assembly with the groove 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 T-6 Motor Lock Ring
Wrench/Spindle Puller Tool. Torque settings to be
6.2–7.3 Nm (55–65 in lbs). Note: A simple technique
to ensure 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 hous-
ing.
11. Spin on a new (35) Pad and hand-tighten it using the
(34) 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 10,000 rpm tool should run between
10,500 to 9,500 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 be-
cause of wind resistance. This will not affect performance
when sanding.
Loctite® is a registered trademark of the Loctite Corp.
Rev 11/11/14