ARO RG1AA, Operator'S Manual

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16
MAINTENANCE SECTION
6. Using the Inlet Retainer Removal Tool (37), depress
the two tabs on the Inlet Bushing Retainer (7), located
180 degrees apart, while pulling the Housing off the
Inlet Bushing Assembly.
7. If the Inlet Bushing Seal (8F) remained in the Housing
when the Inlet Bushing Assembly was removed,
remove it from the Housing.
Disassembly of the Gearing
1. For Series RG2C, RG2D, RG2F, RG2G, RG2H and
RG2J,
using snap ring pliers, remove the Gear
Retainer (22) from inside the Gear Case and remove
the Gear Head Spacer (23).
2. For Series RG2A, lightly rap the motor end of the
Gear Case on a wooden work bench top to remove the
Drive Plate (24).
For Series RG2C,
lightly rap the motor end of the
Gear Case on a wooden work bench top to remove the
Drive Plate (24), Planet Gear Head Assembly (25) and
the Planet Gear Head Spacer (28).
For Series RG2H and RG2J,
lightly rap the motor
end of the Gear Case on a wooden work bench top to
remove the three Planet Gears (26), the Planet Gear
Head Assembly (25) and the Planet Gear Head Spacer
(28).
For Series RG2F and RG2G, lightly rap the motor
end of the Gear Case on a wooden work bench top to
remove the three Planet Gears (26), the Rotor Pinion
(27), the Planet Gear Head Assembly (25) and the
Planet Gear Head Spacer (28).
If the Spindle Assembly is being removed or
replaced, the Spindle Bearing and Spindle Cap
Bearing may be damaged during the removal
process. We recommend that new replacement
bearings be available for installation when the tool is
reassembled.
3. Stand the Gear Case on the table of an arbor press with
the threaded end of the Spindle Assembly (29) upward.
Using a rod slightly smaller than the spindle shaft,
press the Spindle Assembly out of the Spindle Cap
Bearing (34) and Spindle Bearing (31).
4. Insert a long, small drift through the central opening of
the Spindle Bearing and push the Bearing Spacer (32)
off to one side. Using a hammer with the drift, tap the
inner ring of the Spindle Cap Bearing. Repeat the
process at several points until the Bearing is free from
the Gear Case. Remove the Bearing Spacer from the
Gear Case.
5. Using snap ring pliers, remove the two Bearing Stops
(33).
6. Stand the Gear Case on the table of an arbor press with
the threaded end upward, and press the Spindle
Bearing out of the Gear Case.
Disassembly of the Motor
1. Using snap ring pliers, remove the Rear End Plate
Assembly Retainer (12) and slide the Rear End Plate
Assembly (11) off the rear hub of the Rotor.
2. Use a piece of leather or other protective material to
grasp the splined shaft of the Rotor and pull the
assembled Rotor out of the Cylinder (13).
3. Remove the Vanes (16) from the Rotor.
4. Support the Front End Plate Assembly (17), as near the
rotor body as possible, on the table of an arbor press
and press the Rotor from the Front Rotor Bearing (19).
Remove the Bearing from the Front End Plate.
Disassembly of the Throttle Mechanism
1. Grasp the hex of the Inlet Bushing Assembly (4) in
leather--covered or copper--covered vise jaws with the
end having the Inlet Bushing Screen (5) downward.
2. Remove the Inlet Bushing Seal (8F) from the Inlet
Bushing Assembly.
3. Using snap ring pliers, remove the Valve Seat Retainer
(8E) and the Valve Seat Support (8D) from the
Bushing.
4. Using a hooked tool without sharp edges or points,
remove the Throttle Valve Seat (8C) from inside the
Bushing.
5. Remove the Throttle Valve (8A) and Throttle Valve
Spring (8B) from the Bushing.
6. If the Inlet Bushing Screen is dirty, flush it clean using
a clean, suitable, cleaning solution in a well ventilated
area. Remove the Screen only if it is damaged or as a
last resort and have a replacement Screen on hand
whenever removal becomes necessary. Use the eraser
end of a pencil to push it out the inlet end of the
Bushing.
7. If the Inlet Bushing Bezel (6) needs replacement,
slightly spread the Inlet Bushing Retainer (7) and push
it off the side of the Bushing. Slide the Bezel off the
Bushing.
8. To remove the Trigger Assembly (3A), insert a long
probe with a small hook into the opening for the Inlet
Bushing Assembly in the Motor Housing (1) and
hooking the Trigger Retainer (3B), pull the Retainer
out of the Housing. Pull the Trigger out of the
Housing.
ASSEMBLY
General Instructions
1. Always press on the inner ring of a ball--type bearing
when installing the bearing on a shaft.
2. Always press on the outer ring of a ball--type bearing
when pressing the bearing into a bearing recess.