19
MAINTENANCE SECTION
5. Grasp the splined end of the Rotor in leather–covered
or copper–covered vise jaws with the short hub of the
Rotor upward.
6. Wipe each Vane (20) with a film of light oil and place
a Vane in each slot in the Rotor.
7. Place the Cylinder (21), air port end trailing, down
over the Rotor and against the Front End Plate.
8. Place the Rear End Plate (17), flat side first, over the
short hub of the Rotor.
When performing the next step, make certain the
Rear End Plate Retainer (18) does not spring away
as you slip it onto the hub of the Rotor.
9. Install the Rear End Plate Retainer in the groove on
the rotor hub.
10. Smear a film of light grease on the Rear End Plate
Gasket (16) and place the Gasket on the End Plate so
that the port in the Gasket is aligned with the port in
the End Plate.
11. Using an assembly dowel 3/32” in diameter by 10”
long (2.3 mm x 254 mm), align the dowel holes in
the Front End Plate, Cylinder and Rear End Plate.
Insert the assembly rod through the aligned holes so
that about 3” (76 mm) of the rod extends beyond the
Rear End Plate. Insert the extension into the dowel
hole at the bottom of the housing bore, and slide the
motor into the Motor Housing until it seats.
12. Withdraw the assembly dowel and insert the Cylinder
Dowel (23) until the Cylinder Dowel is slightly below
the surface of the Front End Plate.
13. Place the two Bearing Spring Washers (26) inside the
Front Rotor Bearing Housing (25).
14. Slide the Front Rotor Bearing Housing over the Front
Rotor Bearing.
Assembly of the Gearing
1. Using a sleeve that contacts only the outer ring of the
Bearing, press the Spindle Bearing (40) into the Gear
Case (38) until it seats.
2. Place the Grease Shield (42) against the Spindle
Bearing so that the outer rim of the Grease Shield
slides over the outer ring of the Bearing.
3. Using snap ring pliers, install the Spindle Bearing
Retainer (41) in the groove behind the Bearing and
Grease Shield.
4. If the Spindle Planet Gear Bearings (30) or Gear Head
Planet Gear Bearings ((36) were removed, press a
new Bearing into each Spindle Planet Gear (29) or
Gear Head Planet Gear (35) using a bearing inserting
tool that has a pilot and that contacts the outer radius
of the Bearing. Press against the stamped end of the
Bearing.
5. Work a small amount of the recommended grease into
the gear teeth in the Gear Case.
6. Insert the Spindle, threaded end first, into the Gear
Case and through the bore of the Spindle Bearing.
7. For D ratio, align the three holes in the Drive Plate
(33) with the spindle gear shafts and install the Drive
Plate on the shafts.
For all other ratios, grease the bearings and gears of
the Spindle Planet Gear Assemblies (29) and install
them on the pins of the Spindle.
8. For M, N or Q ratio, install the Gear Head Spacer
(37) in the Gear Case against the Spindle Planet
Gears.
9. For M, N or Q ratio, grease the splined hub of the
Gear Head (34) and insert it into the Gear Case. The
splined hub must pass through the Gear Head Spacer
and mesh with the teeth of the Spindle Planet Gears.
10. For M, N or Q ratio, grease the bearings and gears
of the Gear Head Planet Gear Assemblies (35) and
install them on the pins of the Gear Head.
11. For H, J or JJ ratio, grease the Rotor Pinion (31)
and nstall it in the center of the Spindle Planet Gears.
Make certain the teeth of the Pinion and Planet Gears
mesh.
For M or N ratio, grease the Rotor Pinion (31) and
install it in the center of the Gear Head Planet Gears.
Make certain the teeth of the Pinion and Planet Gears
mesh.
12. For H, J, JJ, M or N ratio, slide the Rotor Pinion
Spacer (32) onto the splined shaft of the Rotor.
13. Install the Bearing Housing Spacer (27) against the
gearing or Drive Plate in the Gear Case.
14. Thread the assembled Gear Case onto the assembled
Motor Housing until it is hand tight. Make certain the
gear teeth on the Spindle mesh with the gear teeth of
the Rotor Pinion, Gear Head Planet Gears or Spindle
Planet Gears.
After hand tightening the Gear Case, run the
motor at free speed on low air pressure while final
tightening the Gear Case. Listen while tightening
to make certain the gears mesh properly.
15. Tighten the Gear Case between 40 and 50 ft–lb (54
and 68 Nm) torque.
16. Install the Drill Chuck Spacer (43) onto the drill
spindle.
17. Thread the Drill Chuck (47) onto the drill spindle and
tighten.
18. For M or Q ratio, install the Dead Handle Adapter
(45) and Dead Handle Assembly (46) onto the front
end of the Gear Case. Tighten the Pinch Bolt (47)
between 10 and 20 in. lb (1.4 and 2.3 Nm) torque.
