MIRKA ROS2-550NV Notice D'utilisation page 9

NOTICE: To receive any expressed or implied warranty, tool must be repaired by an authorized Mirka Service Center. The following
general service instructions provided are for use after completion of the warranty period.
DISASSEMBLY INSTRUCTIONS
Motor Disassembly:
To prevent damage to the motor assembly the following sequence
must be followed:
1. Remove the (24) Pad with the (23) 24 mm Pad Wrench.
2. Unscrew the (12) Lock Ring with the (MPA0025) T-6 Motor
Lock Ring Wrench/Spindle Puller Tool. The motor assembly
and Lock Ring can now be lifted out of the (33) Motor Hous-
ing.
3. Remove the (1) Retaining Ring and the (5) O-Ring from the
(4) Cylinder.
4. Remove the (3) Rear Endplate. This requires supporting the
Rear Endplate using a (MPA0416) Bearing Separator and
lightly pressing the shaft through the (2) Bearing and the
Rear Endplate. Remove the (4) Cylinder and the five (7)
Vanes and (6) Rotor from the shaft of the (13) Shaft Balancer.
Remove the (8) Keys then press off the (9) Front Endplate
(with (10) Bearing), (11) O-Ring and the (12) Lock Ring. It
may be necessary to remove the Bearing with a Bearing
Separator if it came out of the Front Endplate and stuck to the
shaft of the Shaft Balancer.
5. Remove and discard (69) Dust Shield from the (13) Shaft
Balancer.
6. Remove the bearing(s) from the endplates by using the
(MPA0036) T-8 Bearing Removal Tool to press out the bear-
ings.
Shaft Balancer and Spindle Disassembly:
1. With a thin screwdriver pick out the slotted end of the (22)
Retaining Ring and peel out.
2. Screw the threaded end of the (MPA0025) T-6 Motor Lock
Ring Wrench/Spindle Puller Tool into the (21) Spindle until
hand tight. Apply a gentle heat from a propane torch or hot
air gun to the large end of the (13) Shaft Balancer until it is
about 100° C (212° F) to soften the adhesive. Do not over
heat. Remove the spindle assembly by using the slider to
pull the spindle assembly outward. Allow the parts to cool
until they are safe to handle. Do not "bang out" the spindle
assembly using the T-6 Motor Lock Ring Wrench/Spindle
Puller Tool because this could damage the Bearing.
3. The AirSHIELD™ components are held in place by the light
press fit of the (16) Retainer. These components can be
damaged during removal and may need to be replaced if
removed. To remove the Retainer, use an o-ring pick or a #8
sheet metal screw to grip and pull out the Retainer. Remove
the (15) Valve and (14) Filter from the bore in the (13) Shaft
Balancer. If the Retainer and Valve were not damaged, they
can be reused. However, the Filter should be replaced on
re-assembly.
4. Remove the (17) Retaining Ring from the (21) Spindle.
5. Remove the (18) bearing from the (21) Spindle. Remove
the (19) Spacer, (70) Dust Shield and (20) Washer from the
Spindle. Discard Dust Shield.
Housing Disassembly:
1. Unscrew the threaded (25) Plug(s) and/or the (50) Handle (if
used) from the (33) Motor Housing.
2. Remove the (31) Hanger and (32) Spacer Ring. (if used)
3. Remove the (56) Retaining Ring. The (55) Speed Control
(with (54) O-Ring) will now pull straight out from the (33) Mo-
tor Housing. Use an o-ring pick to remove the O-Ring from
the Speed Control.
4. Use a T-20 Torx driver to unscrew all (52 and 53) Screws.
5. Remove the (26 and 51) Housings.
6. Remove the (27) Muffler and (28 and 29) Seals from the (26)
Housing.
MIRKA 12,000 RPM
125 mm (5 in.) & 150 mm (6 in.)
RANDOM ORBITAL SANDERS
SERVICE INSTRUCTIONS
6a. For Non-Vacuum (NV) machines: Remove the (61) End Cap.
6b. For Central Vacuum (CV) and Self Generated Vacuum (SGV)
machines: Remove the (62) End Cap. Remove the (65)
Hose Seal from the CV/SGV End Cap.
7. Unscrew the (63) Inlet Bushing from the (61 and 62) End
Cap. Remove the (60) Mufflers, (57) Captive Ring, (58) O-
Ring, and (59) O-Ring from the End Cap.
8a. For NV and CV machines: Remove the exhaust (45) Tubing,
(46) Tubing Clamp, and inlet (47) Tubing from the motor
housing assembly. Separate the exhaust Tubing, Tubing
Clamp, and inlet Tubing from each other.
8b. For SGV machines: Remove the inlet (47) Tubing from the
motor housing assembly.
9. Unscrew the three (44) Screws from the motor housing as-
sembly.
10a. For NV and CV machines: Remove the NV/CV (43) Exhaust
Nozzle and the (41) Gasket from the motor housing assem-
bly.
10b. For SGV machines: Remove the SGV (42) Exhaust Nozzle
and the (41) Gasket from the motor housing assembly.
11. Press out the (34) Spring Pin from the (33) Motor Housing
and remove the (30) Throttle Lever.
12. Remove the (40) Seal Assembly. This component can be-
come damaged during removal and will need to be replaced if
damaged.
13. Remove the (39) Spring, (38) Valve, (37) Valve Seat, and the
(35) Valve Stem from the (33) Motor Housing. Use an o-ring
pick to remove the o-ring from the Valve Stem.
14. Remove the (36) Sleeve from the (33) Motor Housing.
15. Remove the (48 or 49) Shroud from the (33) Motor Housing.
ASSEMBLY INSTRUCTIONS
NOTE: All assembly must be done with clean dry parts and all
bearings are to be pressed in place by the correct tools and
procedures as outlined by the bearing manufacturers.
Housing Assembly:
1. Press the (36) Sleeve flush to the top of the (33) Motor Hous-
ing.
2. Lightly grease the o-ring and place it in the groove of the (35)
Valve Stem. Install the Valve Stem into the (36) Sleeve.
3. Install the (37) Valve Seat, the (38) Valve and the (39) Spring.
Press the (40) Seal Assembly into the (33) Motor Housing.
4. Install the (30) Throttle Lever into the (33) Motor Housing with
the (34) Spring Pin.
5. Install the (48 or 49) Shroud onto the (33) Motor Housing.
6a. For NV and CV machines: Install the NV/CV (43) Exhaust
Nozzle and the (41) Gasket using the three (44) Screws.
Torque setting to be 2.4-3.4 N-m (21-30 in-lbs). Insert the
exhaust (45) Tubing and the inlet (47) Tubing into the (46)
Tubing Clamp. Then insert the exhaust Tubing into the
Exhaust Nozzle and insert the inlet Tubing into the (40) Seal
Assembly.
6b. For SGV machines: Install the SGV (42) Exhaust Nozzle and
(41) Gasket using the three (44) Screws. Torque setting to
be 2.4-3.4 N-m (21-30 in-lbs). Insert the inlet (47) Tubing into
(40) Seal Assembly.
7. Install the two (60) Mufflers, (58) O-Ring, (57) Captive Ring,
(59) O-Ring into the (61 or 62) End Cap. Lightly grease the
o-rings before installation.
8. Coat the threads of the (63) Bushing Assembly with 1 or 2
drops of Loctite™ 222 or equivalent non-permanent pipe
thread sealant. Screw the Bushing Assembly into the inlet
8