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3. Working over a workbench, carefully slide the
Connector Retaining Sleeve off the Angle Housing
Connector.
4. Slide the Retaining Sleeve Spring (117) off the Angle
Housing Connector.
5. Using a thin blade screwdriver, pry the two Connector
Lock Pins (115) from the Housing.
6. Using a spanner wrench in one of connector lock pin
holes, unscrew and remove the Angle Housing
Connector (114).
7. Pull the Bevel Pinion Driver (109) off the Bevel
Pinion Assembly (104).
8. Slide the Bevel Pinion Assembly, four Bevel Pinion
Clamp Washers (110), Bevel Pinion Bearing (107)
and Bevel Pinion Spacer (108) from the Angle
Housing Assembly. Remove the Angle Housing from
the vise.
9. Grasp the Angle Housing in leather–covered or
copper–covered vise jaws, Bevel Gear (111) facing
upward.
10. Using snap ring pliers, remove the Bevel Gear
Bearing Retainer (113).
11. Slide the Bevel Gear Bearing (107), Bevel Gear, and
Bevel Gear Spindle (112) from the Angle Housing.
Remove the Angle Housing from the vise.
Further disassembly of the Model 2920B9
Impactool is identical to Model 2920B.
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.
3.
Whenever grasping a tool or part in a vise, always use
leather–covered or copper–covered vise jaws. Take
extra care with threaded parts and housings.
4.
Always clean every part and wipe every part with a
thin film of the recommended oil before installation.
5.
Apply a film of o–ring lubricant to all O–rings before
final assembly.
Assembly of the Throttle Mechanism
1.
Sandwich the Exhaust Baffle (11) between the two
Exhaust Silencers (12) and install them in the
rectangular opening in the bottom of the Motor
Housing (1).
2.
Install the Exhaust Deflector Gasket (14) on the rim
of the opening.
3.
Place the Exhaust Deflector (13) over the Gasket and
after applying a thread locking compound to the four
MAINTENANCE SECTION
4.
5.
6.
Assembly of the Motor
1.
2. Slip the Front End Plate and Bearing over the splined
3. Grasp the splined end of the Rotor in leather–covered
4. Dampen each Vane (28) with light oil and insert a
5. Set the Cylinder (27) over the Rotor and onto the
6. Slide the Rear End Plate and Bearing onto the Rotor
7. Using snap ring pliers, install the Rear Rotor Bearing
8. Align the dowel hole in both End Plates with the one
9. While holding the assembled motor intact, remove it
10. Insert the protruding end of the guide rod into the cast
11. Remove the guide rod and install the Cylinder Dowel
12. Install the End Plate Dowel (30).
13. Grasp the handle of the Motor Housing in
20
Exhaust Deflector Screws (15), secure the Deflector
with the Screws. Tighten each Screw to 20 to
25 in–lb (2 to 3 Nm) torque.
Apply a thin coat of O–ring lubricant to the Throttle
Valve Face (6). Using a dowel, seat the Valve
securely and without damage.
Install the Throttle Valve on the small end of the
Throttle Valve Plunger (4) and insert the Plunger and
Valve, Plunger first, into the air inlet chamber of the
housing.
Put the small end of the Throttle Valve Spring (7)
over the trailing end of the Throttle Valve. Place the
Air Strainer Screen (8) so that it sits within the coils
of the Spring and install the Air Inlet Bushing (9).
Tighten the Inlet Bushing to 50 to 60 ft–lb (68 to
81 Nm) torque.
Using a sleeve that will contact only the outer ring of
the bearing. press the Front Rotor Bearing (32) into
the Front End Plate (29) and the Rear Rotor Bearing
(24) into the Rear End Plate (25).
hub of the Rotor (31).
or copper–covered vise jaws with the Rotor in a
vertical position.
Vane into each vane slot in the Rotor.
Front End Plate.
hub and against the Cylinder.
Retainer (23) in the groove on the rotor hub.
through the Cylinder, and insert a guide rod
3/16" x 8" (4.7 mm x 203 mm) through the holes.
Allow the rod to protrude about 3–1/2" (89 mm) from
the Rear End Plate.
from the vise.
slot at the bottom of the Motor Housing bore and slide
the assembled motor along the rod until it is
completely seated in the housing.
(33).
leather–covered or copper–covered vise jaws with the
open end of the Motor Housing upward.
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