Motor Assembly - MIRKA mr-312th Instrucciones De Manejo

Motor Assembly:

1. Press fit (14) Bearing (2 shields) into the (13) Front
Endplate and (3) Bearing (2 shields) into the (4)Rear
Endplate.
2. Press the Front Endplate and Bearing Assembly into
position on the (15 or 17) Motor Shaft. Place the (9)
Key(s) into the groove(s) on the Motor Shaft. Place
the (5 or 7) Rotor onto the Motor Shaft.
3. Place the (10 or 12) Cylinder over the (5 or 7) Rotor
with the short end of the spring pin engaging the blind
hole in the (13) Front Endplate. Oil the five (6 or 8)
Vanes with a quality pneumatic tool oil and place in
the slots in the Rotor. NOTE: The spring pin must
project 1.5 mm (.060 in.) above the flanged side of
the Cylinder. Lightly press fit the (4) Rear Endplate
over the (15 or 17) Motor Shaft and secure with the
(2) Retaining Ring. CAUTION: The Retaining Ring
must be placed so that the middle and two ends of the
hoop touch the (3) Bearing first. Both raised center
portions must be securely "snapped" into the groove
in the Motor Shaft by pushing on the curved portions
with a small screwdriver.
4. Lightly grease the (11) O-Ring and place in the air
inlet of the (10 or 12) Cylinder.
5. For 77mm (3 in.) machines, place the (1) Motor
Spacer into the (44) Motor Housing. Make sure the
pin engages the hole in the Motor Housing.
6. Lightly grease the inside diameter of the (44) Motor
Housing, line up the spring pin with the marking on
the Motor Housing and slide the Motor Assembly
DOC A2048
10
into the Motor Housing. Make sure the spring pin
engages the hole in the Motor Housing or (1) Motor
Spacer.
7. For 77mm (3 in.) machines, place the (16) Motor
Spacer into the (44) Motor Housing.
8. Take the (18) Planetary Gears of the Machined Spin-
dle Housing assembly and line them up, and partially
engage them with the gear in the (15 or 17) Motor
Shaft. Carefully screw the (22) Spindle Housing into
the (44) Motor Housing with the T-6 Motor Lock Ring
Wrench/Spindle Puller (Included in MPA0928 Kit) until
hand tight. Torque setting 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 service tool 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.
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 2,500 and 3,500
RPM for 3,000 RPM machines 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.
Rev 02/18/10