Assembly of the Motor
1. Using an arbor press, press against the inner race of
the bearing to install the Front Rotor Bearing (32)
onto the Rotor Shaft (33).
2. Inspect the Front End Plate (31) for nicks or burrs.
Replace if necessary. Install the Front End Plate over
the Rotor Shaft and onto the Front Rotor Bearing.
This is a light press fit.
3. Grasp the spline end of the Rotor Shaft in
copper–covered vise jaws. Insert the Rotor Key (30)
in the slot of the Rotor (28).
4. The Rotor is counterbored on one end. Place that end
over the Rotor Shaft. It should be a slip fit. If
tightness is detected, lightly polish one long side of
the Rotor Key using fine emery cloth on a hard, flat
surface. Insert the Rotor Key with the polished side
toward the Rotor Shaft. Apply a light film of
Ingersoll–Rand No. 50 Oil to each Vane (29) and
insert one Vane, straight end out, into each slot in the
Rotor. If any new Vanes are required, replace the
entire set.
5. Place the Cylinder (25) over the Rotor matching the
End Plate Dowel (short dowel) (26) to the alignment
hole in the Front End Plate.
6. Align the Rear End Plate (24) with the Cylinder
Dowel (long dowel) (27).
7. Check the outside diameter and large inside diameter
of the Rear Rotor Bearing Seal Assembly (21) for
wear. If the outside diameter of the hub is worn to
1.76" (44.704 mm) or smaller, and/or the large inside
diameter is worn to 0.910" (23.122 mm) or larger,
install a new Rear Rotor Bearing Seal Assembly. Take
all measurements 90 degrees to the left of the dowel
hole when facing the hub side of the Seal Assembly.
Install the Assembly matching the Cylinder Dowel to
the alignment hole in the Bearing Seal Assembly.
8. Press the Rear Rotor Bearing Seal Assembly onto the
hub of the Controller (20).
In the following step, tighten the Controller
between 5 and 7 ft–lb (6.8 and 9.5 Nm) torque. The
Controller may be damaged if this torque is
exceeded. Always check the free speed of a saw
after it has been reassembled and before it is put
back into service. Never use a saw which runs in
excess of the maximum speed listed on the
nameplate.
9. Slip the Controller Assembly over the Rotor Shaft.
Rotate the Controller counterclockwise since this is a
left–hand thread. Use only the special No. 99V60–950
Controller Wrench for applying the assembly.
MAINTENANCE SECTION
10. Install the Controller Nut (19) which has a right–hand
11. Dampen the Rear End Plate Gasket (18) with a light
12. Grasp the Motor Housing (1) in leather–covered or
13. Place the two Motor Clamp Washers (34) in the
14. Using an assembly dowel, line up the motor in the
15. Lightly coat the Backhead Live Air Seal (14) with
16. Lightly coat the Backhead Seal (15) with O–ring
17. Install the Backhead (13) against the Motor Housing
18. Install the Lock Washers (17) and Backhead Screws
19. Fill the oil chamber with Ingersoll–Rand No. 50 Oil
Assembly of Gearing and Installation of Guards
1. Press the Front Arbor Bearing (44) into the Stationary
2. Install the Swing Guard Washer (78) over the shielded
3. Install the Swing Guard (75), Swing Guard Shim (77)
4. Install the Arbor (40) through the Swing Guard and
5. Install the Arbor Gear Key (42) into the slot of the
25
thread that requires a clockwise rotation for
installation. Tighten between 25 and 35 in–lb (2.8 and
4.0 Nm) torque.
film of Ingersoll–Rand No. 50 Oil and place the
Gasket over the Controller Assembly and onto the
Rotor Bearing Cage making sure the hole in the
Gasket aligns with the cylinder dowel hole.
copper–covered vise jaws, large open end up.
Motor Housing, concave side up, so the inner rim of
the washers contacts the Front End Plate.
Motor Housing. Remove the assembly dowel and
insert the Cylinder Dowel.
O–ring lubricant and install the Seal in the small
recess of Motor Housing.
lubricant and install the Seal in the large recess of the
Motor Housing.
making sure the holes in both the Backhead and
Motor Housing align.
(16) slightly tightening opposite screws; then tighten
all screws between 13 and 15 ft–lb (17.6 and
20.3 Nm) torque.
and install the Oil Chamber Plug (7). Tighten the Plug
to 4 ft–lb (5.4 Nm) torque.
Guard (64), shielded side toward the Saw Blade (93).
This is a light press fit.
end of the Front Arbor Bearing and against the
Stationary Guard.
and Arbor Bearing Cap (45). Using No. R3H–26
Spanner Wrench and turning clockwise, tighten the
Arbor Bearing Cap snugly.
Stationary Guard, flanged end trailing.
Arbor. Align the staked keyway of the Arbor Gear
(43) with the Arbor Gear Key in the Arbor. Using a
soft hammer, tap the Gear onto the Arbor Shaft.