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Assembly of the Motor
1. Using an arbor press against the inner race of the
bearing, install the Front Rotor Bearing (28) onto the
Arbor (27).
2. Inspect the Front End Plate (29) for nicks or burrs. If
replacement is necessary, wipe the part with oil.
Press the Arbor Bearing into the Front End Plate.
3. Hold the Arbor in leather–covered or copper–covered
vise jaws. Insert the Rotor Key (30) in the slot of the
Rotor (31). The Rotor has a staked keyway on one
end. Place that end up, over the Arbor. Apply a light
film of the recommended oil to each Vane (32) and
insert one vane, straight edge out, into each slot in the
Rotor. If any new vanes are required, replace the
entire set.
4. Place the Cylinder over the Rotor matching the
Cylinder Dowel hole to the alignment hole in the
Front End Plate (29), with the kidney port to the right
of the dowel hole.
5. Apply the Rear End Plate (35) with the kidney port to
the right of the dowel hole.
Take all measurements 30 degrees to the left of the
dowel hole when facing the hub side of the Seal.
Install the Rotor Bearing Seal hub down.
Prior to tool assembly, carefully inspect the
Controller Assembly for nicks, gouges or dents.
Replace it with a new Controller Assembly if
necessary. Test free speed before applying a
grinding wheel.
If the Controller Assembly (37) needs to be
replaced, you must also replace the Rotor Bearing
Seal Assembly (38) which consists of a rear rotor
bearing and a rotor bearing seal. If either the rear
rotor bearing or rotor bearing seal needs to be
replaced, BOTH must be replaced with a new
bearing and seal. Do not mix old and new parts.
6. Check the outside diameter and large inside diameter
of the Rotor Bearing Seal (38) for wear. If the outside
diameter is worn to 1.1764" (29.881 mm) or smaller,
and/or the large inside diameter is worn to 0.9103"
(23.122 mm) or larger, install a new Rotor Bearing
Seal.
MAINTENANCE SECTION
7. Align the Rear End Plate (35), cavity and pin up, with
8. Press the Rotor Bearing Seal Assembly onto the hub
9. Slip the Controller Assembly over the arbor. Rotate
10. Install the Controller Retaining Ring (40), concave
11. Place the lever handle in leather–covered or copper–
12. With an assembly dowel, line up the motor in the
13. Install the two Motor Clamp Washers (41) concave or
14. Apply the Cylinder Case Gasket (42), the proper
15. Again make certain the Arbor is free.
16. The Dead Handle (25) may be adjusted to two
19
the larger hole in the Rotor Bearing Seal.
of the Controller.
the Controller counterclockwise since this is a
left–hand thread.
Use only the special No. 88V60–950 Controller
Wrench for applying the assembly.
Tighten the Controller to 14 to 16 ft–lb (19.0 to
21.7 Nm) torque. Do not exceed 16 ft–lb. The
Controller may be damaged if this torque is
exceeded. Always check the free speed of a
Grinder after it has been reassembled and before it
is put back into service. Refer to the Test and
Inspection Procedure.
Never use a Grinder which runs in excess of the
maximum speed listed in the Test and Inspection
Procedure.
face closest to the Controller.
covered vise jaws, open end of the Cylinder Case
Assembly up. Lightly dampen the Rear End Plate
Gasket (36) with oil and line it up with the hole in the
Cylinder Case so that the notch in the Gasket matches
the Cylinder Case.
Cylinder Case. Remove the assembly dowel and
insert the Cylinder Dowel (34).
dish side up.
Guard (43 or 44), the Cylinder Case Screw Lock
Washers (45) and the five Screws (46). Slightly
tighten opposite screws, make sure the arbor is free,
then tighten all screws to 14 ft–lb (19 Nm) torque.
positions. Insert a 5" (127 mm) long 3/16" hex
wrench into the elongated slot in the end of the Dead
Handle and loosen the screw securing the Handle to
the Cylinder Case. Rotate the Handle 180° and
tighten the screw to 18 ft–lb (24.4 Nm) torque.
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