2–11
MAINTENANCE SECTION
4. Using a 1/4” hex wrench or an adjustable wrench,
unscrew and remove either the Inlet Plug (24) or Inlet
Bushing (3) and Seal (25 or 5) from the side of the
Handle.
5. Depress the Throttle Lever (11) and slide the Collar
Assembly (22) rearward until it clears the Lever.
6. Remove the Throttle Lever from the Handle.
7. Using a screwdriver, unscrew and remove the Valve
Plunger Bushing (14) and Bushing Seal (15) along
with the Throttle Valve Plunger (12) and Valve
Plunger Seal (13).
8. Pull the Throttle Valve Guide (17) from the motor
end of the Handle.
9. Using an adjustable wrench for the Inlet Bushing or
a 1/4” hex wrench for the Inlet Plug, unscrew and
remove either the Inlet Bushing or Inlet Plug and Seal
from the end of the Handle.
10. Pull the Exhaust Deflector (6), Muffler Body (7) and
three Muffler Elements (8) off the end of the Handle.
11. Raise the Adjustable Grip Latch (10) to the highest
position, spread the open end slightly and slide the
Latch off the rear of the Handle.
12. Slide the Adjustable Grip (9) and Collar Assembly
off the rear of the Handle.
Assembly of the Handle
1. Slide the Collar Assembly (22) onto the Handle (1).
2. Install the Muffler Body (7), large opening trailing,
onto the inlet end of the Handle.
3. Position the three Muffler Elements (8) into the Muf-
fler Body and then capture them by installing the Ex-
haust Deflector (6) against the Muffler Body.
4. If the tool is to be used with the air supply enter-
ing the end of the Handle, install the Inlet Bushing
Seal (5) over the threads of the Inlet Bushing (3) and
install it in the end of the Handle. Tighten the Bush-
ing between 20 and 30 ft–lb (27 and 40 Nm) torque.
If the tool is to be used with the air supply enter-
ing the side of the Handle, install the Inlet Plug Seal
(25) over the threads of the Inlet Plug (24) and install
it in the end of the Handle. Tighten the Plug between
30 and 40 in–lb (3.4 and 4.5 Nm) torque.
5. Push the Throttle Valve Guide (17), open end leading,
into the recess at the motor end of the Handle. Rotate
the Guide until the hole in the side of the Guide
aligns with the opening for the Throttle Valve Plunger
(12).
6. With the Valve Plunger Seal (13) installed in the an-
nular groove in the Throttle Valve Plunger, slide the
Plunger, large end trailing, into the non–slotted end of
the Valve Plunger Bushing (14).
7. Install the Bushing Seal (15) over the threads of the
Bushing against the large head.
8. Apply Perma–Lok LH050 Pipe Sealant* to the first
two threads of the slotted end of the Bushing.
9. Using a screwdriver in the slot of the Bushing, thread
the assembled Plunger and Bushing into the Handle
until the trailing end of the Bushing is flush with the
handle surface. Make certain the Plunger enters the
hole in the Throttle Valve Guide. Make certain the
Plunger is retracted against the Bushing before instal-
ling the Throttle Valve Spring (16).
10. Install the Throttle Valve Spring, large end leading, in
the handle against the Throttle Valve Guide.
11. Install the two Reverse Valve Washers (30) on the
hub with the internal hex of the Throttle Body (20)
and secure it by installing one of the Throttle Body
Seals (21) in the annular groove ahead of it. Install
the other Seal in the annular groove on the other side
of the large hub.
12. Position the Throttle Valve Seat (19) and Throttle
Valve (18) in the central opening of the Throttle Body
opposite the internal hex and carefully slide the as-
sembly into the motor end of the Handle.
13. Using a 5/16” hex wrench, tighten the Throttle Body
between 30 and 40 in–lb (3.4 and 4.5 Nm) torque.
14. With the Collar Assembly toward the muffler end of
the Handle, position the Throttle Lever (11) in the
Handle with the rounded projection at one end of the
Lever entering the corresponding rounded notch in
the Handle. Depress the Lever and slide the Collar
Assembly forward toward the motor end of the Han-
dle to capture and retain the Lever.
15. If the tool is to be used with the air supply enter-
ing the side of the Handle, install the Inlet Bushing
Seal over the threads of the Inlet Bushing and install
it through the Collar and into the side of the Handle.
Tighten the Bushing between 20 and 30 ft–lb (27 and
40 Nm) torque.
If the tool is to be used with the air supply enter-
ing the end of the Handle, install the Inlet Plug Seal
over the threads of the Inlet Plug and install it
through the Collar and into the side of the Handle.
Tighten the Plug between 30 and 40 in–lb (3.4 and
4.5 Nm) torque.
Assembly of the Motor
1.
Place the Rear End Plate (40), face with the kidney
shaped slots leading, onto the unsplined hub of the
Rotor (41). Position the Rear Rotor Bearing (39) on
the same hub and press the Bearing onto the shaft
against the Rear End Plate.
2.
Install the Cylinder (43) over the Rotor so that the
Cylinder Dowel (44) enters the hole in the Rear End
Plate.
3.
Apply a thin film of oil to each Vane (42) and insert a
Vane into each of the rotor vane slots.
4.
Place the Rotor Spacer (46) on the hex hub of the
Rotor and install the Front End Plate (45) over the
Spacer, counterbored end trailing, against the rotor
face.
*
Product of National Starch and Chemical Corporation.
